Nitridosilicate

{{Short description|Class of chemical compounds}} The '''nitridosilicates''' are chemical compounds that have anions with [[nitrogen]] bound to [[silicon]]. Counter [[cation]]s that balance the electric charge are mostly [[electropositive]] metals from the [[alkali metal]]s, [[alkaline earth]]s or [[rare earth elements]]. Silicon and nitrogen have similar [[electronegativities]], so the bond between them is covalent. Nitrogen atoms are arranged around a silicon atom in a [[tetrahedral]] arrangement.<ref name=pb/>

Related compounds include pnictogenidosilicates :[[phosphidosilicates]], [[arsenidosilicate]]s and [[antimonosilicate]]s; pnictogenidogernamates: [[phosphidogermanate]]s. By replacing silicon, there are also [[nitridogermanate]]s, [[nitridostannate]]s, [[nitridotantalate]]s and [[nitridotitanate]]s.

==Use== Nitridosilicates are used as host substances for [[europium]] in [[LED]] [[phosphor]]s. Examples include CASN ([[calcium aluminium silicide nitride]]) (CaAlSiN₃), SCASN (SrCaAlSiN₃) and SCSN (SrCaSiN₃). These fluoresce red.<ref>{{cite book |last1=Schubert |first1=E. Fred |title=Light-Emitting Diodes |date=3 February 2018 |publisher=E. Fred Schubert |isbn=978-0-9863826-6-6 |url=https://books.google.com/books?id=GEFKDwAAQBAJ&pg=RA5-PA12 |language=en|edition=3rd }}</ref>

==Production== Nitridosilicates can be made in a [[solid state reaction]] by heating [[silicon nitride]] with metallic [[nitride]]s in a nitrogen atmosphere at over 1300&nbsp;°C. If the mixtures are exposed to oxygen or air, then oxides or [[oxynitridosilicate]]s are produced instead. Instead of metal nitrides, ammine complexes, [[Metal amides|amides]] or [[inorganic imide|imides]] can be used instead. In place of the highly stable silicon nitride, [[silicon diimide]] can be used.<ref>{{cite journal |last1=Schnick |first1=Wolfgang |last2=Huppertz |first2=Hubert |title=Nitridosilicates-A Significant Extension of Silicate Chemistry |journal=Chemistry - A European Journal |date=May 1997 |volume=3 |issue=5 |pages=679–683 |doi=10.1002/chem.19970030505 |bibcode=1997ChEuJ...3..679S }}</ref> Carbothermal reduction involves using a metal oxide or carbonate heated with carbon in a nitrogen atmosphere.<ref name=rjx/>

== Properties == The ratio of silicon to nitrogen varies from 1:4 to 7:10 (0.25 to 0.7) with increased condensation, and fewer sites for metals with high silicon content. At a ratio of 3:4 (0.75) there is no longer capacity for metal, as that is [[silicon nitride]].<ref name=":0">{{Cite journal|last1=ten Kate|first1=Otmar M.|last2=Zhang|first2=Zhijun|last3=van Ommen|first3=J. Ruud|last4=Hintzen|first4=H. T. (Bert)|date=2018|title=Dependence of the photoluminescence properties of Eu 2+ doped M–Si–N (M = alkali, alkaline earth or rare earth metal) nitridosilicates on their structure and composition|url=http://xlink.rsc.org/?DOI=C8TC00885J|journal=Journal of Materials Chemistry C|language=en|volume=6|issue=21|pages=5671–5683|doi=10.1039/C8TC00885J|issn=2050-7526|url-access=subscription}}</ref> The more condensed substances, with lower nitrogen content, have greater number of silicon atoms surrounding the nitrogen. This coordination number can vary from one to four, with the most common being three. The silicon atom always is coordinated by four nitrogen atoms. In the [[silicate]]s, silicon is surrounded by four oxygen atoms, but each oxygen is only connected to one or two silicon atoms, and only very rarely three. So nitridosilicates can form more diverse structures than the silicates.<ref name=":1">{{Cite journal|last1=ten Kate|first1=Otmar M.|last2=Zhang|first2=Zhijun|last3=Hintzen|first3=H. T. (Bert)|date=2017|title=On the relations between the bandgap, structure and composition of the M–Si–N (M = alkali, alkaline earth or rare-earth metal) nitridosilicates|journal=Journal of Materials Chemistry C|language=en|volume=5|issue=44|pages=11504–11514|doi=10.1039/C7TC04259K|issn=2050-7526|doi-access=free}}</ref>

Nitridosilicates with higher proportion of silicon (more condensed) are more resistant to attack by water and oxygen, and so can be exposed to the atmosphere without decomposition.<ref name=":1" /> These condensed nitridosilicates are mechanically strong, and resistant to heat, acids and alkalis.<ref name=pb>{{cite thesis|url=https://edoc.ub.uni-muenchen.de/24513/1/Bielec_Philipp.pdf|author=Philipp Bielec|date=27 July 2019|title=The Ion Exchange Approach - Expanding Elemental Variety in Nitridosilicate Chemistry}}</ref>

SiN₄ tetrahedra can be connected to each other via vertices or edges. This differs from SiO₄ which only connects via vertices.<ref name=pb/>

==Use== Nitridosilicates have been used to make [[abrasive]]s, [[turbine blade]]s, [[cutting tool]]s and phosphors.<ref name=rjx>{{cite journal |last1=Xie |first1=Rong-Jun |last2=Hirosaki |first2=Naoto |last3=Li |first3=Yuanqiang |last4=Takeda |first4=Takashi |title=Rare-Earth Activated Nitride Phosphors: Synthesis, Luminescence and Applications |journal=Materials |date=21 June 2010 |volume=3 |issue=6 |pages=3777–3793 |pmc=5521753| doi=10.3390/ma3063777|bibcode=2010Mate....3.3777X |s2cid=18883144 |doi-access=free }}{{open access}}</ref>

==Nitridosilicates== {|class="wikitable" !name !formula !formula weight !crystal

system !space

group !unit cell !volume !density !comments !ref |- | || LiSi₂N₃ | | | | | | | |<ref name=":0" /> |- | |Li₂SiN₂ | | | | | | | |<ref name=":2">{{Cite journal|last1=Casas-Cabanas|first1=M.|last2=Santner|first2=H.|last3=Palacín|first3=M.R.|date=May 2014|title=The Li–Si–(O)–N system revisited: Structural characterization of Li21Si3N11 and Li7SiN3O|url=https://linkinghub.elsevier.com/retrieve/pii/S0022459614000723|journal=Journal of Solid State Chemistry|language=en|volume=213|pages=152–157|doi=10.1016/j.jssc.2014.02.022|bibcode=2014JSSCh.213..152C|via=|url-access=subscription}}</ref> |- | |Li₅SiN₃ | | | | | | | |<ref name=":2" /> |- | |Li₈SiN₄ | | | | | | | |<ref name=":6" /> |- | |Li₁₈Si₃N₁₀ | | | | | | | |<ref name=":2" /> |- | |Li₂₁Si₃N₁₁ | | |''I''4 |a=9.4584 c=9.5194 | | |[[antifluorite structure]] |<ref name=":2" /> |- | |BeSiN₂ | | | | | | | |<ref name=":7">{{Cite journal|last1=Kong|first1=Yuwei|last2=Song|first2=Zhen|last3=Wang|first3=Shuxin|last4=Xia|first4=Zhiguo|last5=Liu|first5=Quanlin|date=2018-02-19|title=The Inductive Effect in Nitridosilicates and Oxysilicates and Its Effects on 5d Energy Levels of Ce 3+|url=https://pubs.acs.org/doi/10.1021/acs.inorgchem.7b03253|journal=Inorganic Chemistry|language=en|volume=57|issue=4|pages=2320–2331|doi=10.1021/acs.inorgchem.7b03253|pmid=29394040|issn=0020-1669|url-access=subscription}}</ref> |- | || MgSiN₂ | | | | | | | |<ref name=":0" /> |- | |NaSi₂N₃ | | | | | | | |<ref name=":7" /> |- | || Ca₂Si₅N₈ |332.64 |monoclinic |''Cc'' |a = 14.3280 b = 5.61165 c = 9.69406 β = 112.1484 Z=4 |721.92 |3.06 |Eu orange fluorescence |<ref name=":0" /><ref name=":12">{{Cite journal|last1=Bielec|first1=Philipp|last2=Janka|first2=Oliver|last3=Block|first3=Theresa|last4=Pöttgen|first4=Rainer|last5=Schnick|first5=Wolfgang|date=2018-02-23|title=Fe 2 Si 5 N 8: Access to Open-Shell Transition-Metal Nitridosilicates|url=http://doi.wiley.com/10.1002/anie.201713006|journal=Angewandte Chemie International Edition|language=en|volume=57|issue=9|pages=2409–2412|doi=10.1002/anie.201713006|pmid=29336096|url-access=subscription}}</ref><ref name="rjx" /> |- | || CaSiN₂ | | | | | | | |<ref name=":0" /> |- | |Ca₃SiN₃H | |monoclinic |''C''2/''c'' |''a'' = 5.236 ''b'' = 10.461 ''c'' = 16.389 β = 91.182° ''Z'' = 8 | | |semiconductor: band gap 3.1 eV |<ref name=":13">{{Cite journal |last1=Dickman |first1=Matthew J. |last2=Schwartz |first2=Benjamin V. G. |last3=Latturner |first3=Susan E. |date=2017-08-07 |title=Low-Dimensional Nitridosilicates Grown from Ca/Li Flux: Void Metal Ca 8 In 2 SiN 4 and Semiconductor Ca 3 SiN 3 H |url=https://pubs.acs.org/doi/10.1021/acs.inorgchem.7b01532 |journal=Inorganic Chemistry |language=en |volume=56 |issue=15 |pages=9361–9368 |doi=10.1021/acs.inorgchem.7b01532 |pmid=28749660 |issn=0020-1669|url-access=subscription }}</ref> |- | || Ca₄SiN₄ | | | | | | | |<ref name=":0" /> |- | |Ca₅Si₂N₆ | | | | | | | |<ref name=":0" /> |- | |Ca₁₂Si₄[SiN₄] | |triclinic |''P''{{overbar|1}} |''a'' 9.0103 ''b'' 9.0218 ''c'' 13.8252 ''α'' 71.053° ''β'' 82.738° ''γ'' 69.763° | | |black |<ref name=":14">{{Cite journal |last1=Link |first1=Lukas |last2=Niewa |first2=Rainer |date=2022-05-25 |title=Diversity in Nitridosilicate Chemistry: The Nitridoalumosilicate Ca 4 (AlSiN 5) and the Nitridosilicate Silicide Ca 12 Si 4 [SiN 4 ] |journal=Zeitschrift für anorganische und allgemeine Chemie |language=en |volume=648 |issue=10 |article-number=e202200004 |doi=10.1002/zaac.202200004 |bibcode=2022ZAACh.648E0004L |issn=0044-2313|doi-access=free }}</ref> |- | |Ca₁₆Si₁₇N₃₄ | | | | | | | |<ref name=":0" /> |- | |CaMg₃SiN₄ | | |''I''4₁/''a'' | | | | |<ref name=":15">{{Cite journal |last1=Schmiechen |first1=Sebastian |last2=Schneider |first2=Hajnalka |last3=Wagatha |first3=Peter |last4=Hecht |first4=Cora |last5=Schmidt |first5=Peter J. |last6=Schnick |first6=Wolfgang |date=2014-04-22 |title=Toward New Phosphors for Application in Illumination-Grade White pc-LEDs: The Nitridomagnesosilicates Ca[Mg 3 SiN 4 ]:Ce 3+, Sr[Mg 3 SiN 4 ]:Eu 2+, and Eu[Mg 3 SiN 4 ] |url=https://pubs.acs.org/doi/10.1021/cm500610v |journal=Chemistry of Materials |language=en |volume=26 |issue=8 |pages=2712–2719 |doi=10.1021/cm500610v |issn=0897-4756|url-access=subscription }}</ref> |- | |Ca₅[Si₂Al₂N₈] | |orthorhombic |''Pbcn'' |''a'' = 9.255 ''b'' = 6.140 ''c'' = 15.578 | | | |<ref name="onlinelibrary.wiley.com">{{Cite journal |last1=Ottinger |first1=Frank |last2=Cuervo-Reyes |first2=Eduardo |last3=Nesper |first3=Reinhard |date=May 2010 |title=Synthesis, Crystal and Electronic Structure of the Nitridoaluminosilicate Ca 5 [Si 2 Al 2 N 8 ] |url=https://onlinelibrary.wiley.com/doi/10.1002/zaac.201000046 |journal=Zeitschrift für anorganische und allgemeine Chemie |language=en |volume=636 |issue=6 |pages=1085–1089 |doi=10.1002/zaac.201000046 |bibcode=2010ZAACh.636.1085O |issn=0044-2313|url-access=subscription }}</ref> |- | |LiCa₃Si2N₅ | |monoclinic |''C''2/''c'' |''a'' = 5.145 ''b'' = 20.380 ''c'' = 10.357 ''β'' = 91.24° | | | |<ref>{{Cite journal |last1=Lupart |first1=Saskia |last2=Schnick |first2=Wolfgang |date=October 2012 |title=LiCa 3 Si 2 N 5 – A Lithium Nitridosilicate with a [Si 2 N 5 ] 7– Double-Chain |url=https://onlinelibrary.wiley.com/doi/10.1002/zaac.201200106 |journal=Zeitschrift für anorganische und allgemeine Chemie |language=en |volume=638 |issue=12–13 |pages=2015–2019 |doi=10.1002/zaac.201200106 |bibcode=2012ZAACh.638.2015L |issn=0044-2313|url-access=subscription }}</ref> |- | |Li₄Ca₃Si₂N₆ |288.24 |monoclinic |''C''2/''m'' |a=5.787 b=9.705 c=5.977 ''β''=90.45 |335.7 |2.852 | |<ref name=":0" /><ref name=":10">{{Cite journal|last1=Pagano|first1=Sandro|last2=Lupart|first2=Saskia|last3=Schmiechen|first3=Sebastian|last4=Schnick|first4=Wolfgang|date=September 2010|title=Li4Ca3Si2N6 and Li4Sr3Si2N6 - Quaternary Lithium Nitridosilicates with Isolated [Si2N6]10- Ions|url=http://doi.wiley.com/10.1002/zaac.201000163|journal=Zeitschrift für anorganische und allgemeine Chemie|language=en|volume=636|issue=11|pages=1907–1909|doi=10.1002/zaac.201000163|bibcode=2010ZAACh.636.1907P |via=}}</ref> |- | |Li₂CaSi₂N₄ | | | | | | | |<ref name=":0" /> |- | |Li₂Ca₂Mg₂Si₂N₆ | | | | | | | |<ref name=":0" /> |- | |Li₂Ca₃MgSi₂N₆ | | | | | | | |<ref name=":0" /> |- | |CaMg₃SiN₄ | | |''I''4₁/''a'' |''a'' = 11.424 ''c'' = 13.445 Z=16 | | | |<ref name=":7" /> |- | |CaAlSiN₃ | |orthorhombic |''Cmc''2₁ | | | |Eu yellow fluorescence |<ref name=":3">{{Cite journal|last1=Watanabe|first1=Hiromu|last2=Wada|first2=Hiroshi|last3=Seki|first3=Keiichi|last4=Itou|first4=Masumi|last5=Kijima|first5=Naoto|date=2008|title=Synthetic Method and Luminescence Properties of Sr[sub x]Ca[sub 1−x]AlSiN[sub 3]:Eu[sup 2+] Mixed Nitride Phosphors|url=https://iopscience.iop.org/article/10.1149/1.2829880|journal=Journal of the Electrochemical Society|language=en|volume=155|issue=3|pages=F31|doi=10.1149/1.2829880|url-access=subscription}}</ref> |- | |CaAlSi₄N₇ | |orthorhombic |''Pna''2₁ |''a'' = 11.6819, ''b'' = 21.0193, ''c'' = 4.9177 Å | | | |<ref name=":4">{{Cite journal|last1=Yoshimura|first1=Fumitaka|last2=Yamane|first2=Hisanori|last3=Yamada|first3=Takahiro|date=2020-01-06|title=Synthesis, Crystal Structure, and Luminescence Properties of a White-Light-Emitting Nitride Phosphor, Ca 0.99 Eu 0.01 AlSi 4 N 7|url=https://pubs.acs.org/doi/abs/10.1021/acs.inorgchem.9b02609|journal=Inorganic Chemistry|language=en|volume=59|issue=1|pages=367–375|doi=10.1021/acs.inorgchem.9b02609|pmid=31808685|s2cid=208744271 |issn=0020-1669|url-access=subscription}}</ref> |- | |Ca₄AlSiN₅ | |orthorhombic |''Pna''2₁ |''a'' 11.2058 ''b'' 9.0512 ''c'' 6.0203 | | |faint red |<ref name=":14" /> |- | |Ca₅Al₂Si₂N₈ | |orthorhombic |''Pbca'' |a= 9.255 b = 6.140 c = 15.578 Z=4 |885.2 |3.171 |yellow |<ref name=":7" /><ref name="onlinelibrary.wiley.com"/> |- | || CaScSi₄N₇ | | | | | | | |<ref name=":0" /> |- |Manganese silicide dinitride |MnSiN₂ | |orthorhombic |Pna2₁ |a = 5.271, b = 6.521, and c = 5.0706 V=174.26 | | |intense red |<ref name=":6">{{cite journal|last1=Esmaeilzadeh|first1=Saeid|last2=Hålenius|first2=Ulf|last3=Valldor|first3=Martin|date=May 2006|title=Crystal Growth, Magnetic, and Optical Properties of the Ternary Nitride MnSiN 2|journal=Chemistry of Materials|volume=18|issue=11|pages=2713–2718|doi=10.1021/cm060382t}}</ref> |- | |Fe₂Si₅N₈ |364.23 |monoclinic |''Cc'' |a= 14.0408 b = 5.32635 c = 9.5913 β = 110.728 Z=4 | | |decompose 1370K; brown |<ref name=":12" /> |- | |ZnSiN₂ | | | | | | | |<ref name=":7" /> |- | || SrSiN₂ | | | | | | | |<ref name=":0" /> |- | || Sr₂Si₅N₈ | |orthorhombic |''Pmn''2₁ |a = 5.71006 b = 6.81914 c = 9.33599 Z=2 |363.52 |3.908 |Eu red fluorescence |<ref name=":0" /><ref name="rjx" /><ref name=":8">{{Cite journal|last1=Bielec|first1=Philipp|last2=Nelson|first2=Ryky|last3=Stoffel|first3=Ralf P.|last4=Eisenburger|first4=Lucien|last5=Günther|first5=Daniel|last6=Henß|first6=Ann-Kathrin|last7=Wright|first7=Jonathan P.|last8=Oeckler|first8=Oliver|last9=Dronskowski|first9=Richard|last10=Schnick|first10=Wolfgang|date=2019-01-28|title=Cationic Pb 2 Dumbbells Stabilized in the Highly Covalent Lead Nitridosilicate Pb 2 Si 5 N 8|url=https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.201812457|journal=Angewandte Chemie International Edition|language=en|volume=58|issue=5|pages=1432–1436|doi=10.1002/anie.201812457|pmid=30536686 |bibcode=2019ACIE...58.1432B |s2cid=54473446 |issn=1433-7851|url-access=subscription}}</ref> |- | |SrSi₆N₈ | | | | | | | |<ref name=":0" /> |- | |SrSi₇N₁₀ | | | | | | | |<ref name=":4" /> |- | |Sr₅Si₇P₂N₁₆ |920.83 | |''Pnma'' |''a''=5.6748 ''b''=28.0367 ''c''=9.5280 Z=4 |1522.1 |4.018 | |<ref>{{Cite journal |last1=Dialer |first1=Marwin |last2=Pointner |first2=Monika M. |last3=Strobel |first3=Philipp |last4=Schmidt |first4=Peter J. |last5=Schnick |first5=Wolfgang |date=2023-12-28 |title=(Dis)Order and Luminescence in Silicon-Rich (Si,P)–N Network Sr 5 Si 7 P 2 N 16 :Eu 2+ |url=https://pubs.acs.org/doi/10.1021/acs.inorgchem.3c04109 |journal=Inorganic Chemistry |volume=63 |issue=2 |pages=1480–1487 |language=en |doi=10.1021/acs.inorgchem.3c04109 |pmid=38154029 |s2cid=266597393 |issn=0020-1669|url-access=subscription }}</ref> |- | |SrAlSi₄N₇ | |orthorhombic |''Pna''2₁ |''a'' = 11.742 ''b'' = 21.391 ''c'' = 4.966 ''Z'' = 8 |1247.2 | | |<ref>{{Cite journal |last1=Hecht |first1=Cora |last2=Stadler |first2=Florian |last3=Schmidt |first3=Peter J. |last4=auf der Günne |first4=Jörn Schmedt |last5=Baumann |first5=Verena |last6=Schnick |first6=Wolfgang |date=2009-04-28 |title=SrAlSi 4 N 7 :Eu 2+ − A Nitridoalumosilicate Phosphor for Warm White Light (pc)LEDs with Edge-Sharing Tetrahedra |url=https://pubs.acs.org/doi/10.1021/cm803231h |journal=Chemistry of Materials |language=en |volume=21 |issue=8 |pages=1595–1601 |doi=10.1021/cm803231h |issn=0897-4756|url-access=subscription }}</ref> |- | |Li₂SrSi₂N₄ | |cubic | |a=10.69 Z=12 |1220 | | |<ref name=":0" /><ref>{{Cite journal|last1=Ding|first1=Jianyan|last2=You|first2=Hongpeng|last3=Wang|first3=Yichao|last4=Ma|first4=Bo|last5=Zhou|first5=Xufeng|last6=Ding|first6=Xin|last7=Cao|first7=Yaxin|last8=Chen|first8=Hang|last9=Geng|first9=Wanying|last10=Wang|first10=Yuhua|date=2018|title=Site occupation and energy transfer of Ce 3+ -activated lithium nitridosilicate Li 2 SrSi 2 N 4 with broad-yellow-light-emitting property and excellent thermal stability|url=http://xlink.rsc.org/?DOI=C7TC04397J|journal=Journal of Materials Chemistry C|language=en|volume=6|issue=13|pages=3435–3444|doi=10.1039/C7TC04397J|issn=2050-7526|url-access=subscription}}</ref> |- | |Li₄Sr₃Si₂N₆ | |monoclinic |''C''2/''m'' |a = 6.127, b = 9.687, c = 6.220, ''β'' = 90.24° Z=2 |369.1 |3.876 | |<ref name=":10" /> |- | |SrBeSi₂N₄ | | |''p''{{overbar|6}}2''c'' |''a''=4.86082 ''c''=9.42264 Z=2 | | | |<ref>{{Cite journal |last1=Strobel |first1=Philipp |last2=Weiler |first2=Volker |last3=Schmidt |first3=Peter J. |last4=Schnick |first4=Wolfgang |date=2018-05-17 |title=Sr[BeSi 2 N 4 ]:Eu 2+ /Ce 3+ and Eu[BeSi 2 N 4 ]: Nontypical Luminescence in Highly Condensed Nitridoberyllosilicates |url=https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/chem.201800912 |journal=Chemistry – A European Journal |language=en |volume=24 |issue=28 |pages=7243–7249 |doi=10.1002/chem.201800912 |pmid=29575174 |bibcode=2018ChEuJ..24.7243S |issn=0947-6539|url-access=subscription }}</ref> |- | |SrMg₃SiN₄ | | |''I''4₁/''a'' |''a'' = 11.495 ''c'' = 13.512 Z=16 | | | |<ref name=":7" /><ref name=":15" /> |- | |Sr₈Mg₇Si₉N₂₂ | | |''Cm'' |''a'' 15.280 ''b'' 7.4691 ''c'' 10.936 ''β'' 110.462° | | | |<ref>{{Cite journal |last1=Li |first1=Chao |last2=Zheng |first2=Hong-Wei |last3=Wei |first3=Heng-Wei |last4=Su |first4=Jie |last5=Liao |first5=Fu-Hui |last6=Zhang |first6=Zhen-Yi |last7=Xu |first7=Ling |last8=Yang |first8=Zu-Pei |last9=Wang |first9=Xiao-Ming |last10=Jiao |first10=Huan |date=2018 |title=Narrow-band blue emitting nitridomagnesosilicate phosphor Sr 8 Mg 7 Si 9 N 22 :Eu 2+ for phosphor-converted LEDs |url=http://xlink.rsc.org/?DOI=C8CC07218C |journal=Chemical Communications |language=en |volume=54 |issue=82 |pages=11598–11601 |doi=10.1039/C8CC07218C |pmid=30264071 |issn=1359-7345|url-access=subscription }}</ref> |- | |SrAlSiN₃ | | |''Cmc''2₁ | | | | |<ref name=":3" /> |- | |SrAlSi₄N₇ | | |''Pna''2₁ | | | | |<ref name=":4" /> |- | || SrScSi₄N₇ | | | | | | | |<ref name=":0" /> |- | |YScSi₄N₆C | |hexagonal |''P''6₃''mc'' |''a''=5.9109 ''c''=9.677 | | | |<ref>{{Cite journal |last1=Yan |first1=Chunpei |last2=Liu |first2=Zhanning |last3=Zhuang |first3=Weidong |last4=Liu |first4=Ronghui |last5=Xing |first5=Xianran |last6=Liu |first6=Yuanhong |last7=Chen |first7=Guantong |last8=Li |first8=Yanfeng |last9=Ma |first9=Xiaole |date=2017-09-18 |title=YScSi 4 N 6 C:Ce 3+ —A Broad Cyan-Emitting Phosphor To Weaken the Cyan Cavity in Full-Spectrum White Light-Emitting Diodes |url=https://pubs.acs.org/doi/10.1021/acs.inorgchem.7b01408 |journal=Inorganic Chemistry |language=en |volume=56 |issue=18 |pages=11087–11095 |doi=10.1021/acs.inorgchem.7b01408 |pmid=28841298 |issn=0020-1669|url-access=subscription }}</ref> |- | || CaYSi₄N₇ | | | | | | | |<ref name=":0" /> |- | || SrYSi₄N₇ | | | | | | | |<ref name=":0" /> |- | |Ca₈In₂SiN₄ | |orthorhombic |''Ibam'' |''a'' = 12.904 ''b'' = 9.688 ''c'' = 10.899 ''Z'' = 4 | | |metallic |<ref name=":13" /> |- | || BaSiN₂ | | | | | | | |<ref name=":0" /> |- | |Ba₅Si₂N₆ | | | | | | | |<ref name=":7" /> |- | || Ba₂Si₅N₈ | |orthorhombic |''Pmn''2₁ | | | |Eu red fluorescence |<ref name=":0" /><ref name="rjx" /> |- | |BaSi₆N₈ | | |''Imm''2 |''a'' = 7.9316, ''b'' = 9.3437, ''c'' = 4.8357, ''Z'' = 2 |358.38 | | |<ref name=":0" /><ref>{{Cite journal|last1=Stadler|first1=Florian|last2=Schnick|first2=Wolfgang|date=April 2007|title=Das reduzierte Nitridosilicat BaSi6N8|url=http://doi.wiley.com/10.1002/zaac.200600356|journal=Zeitschrift für anorganische und allgemeine Chemie|language=de|volume=633|issue=4|pages=589–592|doi=10.1002/zaac.200600356|bibcode=2007ZAACh.633..589S |via=|url-access=subscription}}</ref> |- | |BaSi₇N₁₀ | |monoclinic | |''a'' = 6.8729, ''b'' = 6.7129, ''c'' = 9.6328, β = 106.269'', Z'' = 2 | | |most condensed |<ref name=":0" /><ref>{{Cite journal|last1=Huppertz|first1=Hubert|last2=Schnick|first2=Wolfgang|date=February 1997|title=Edge-sharing SiN 4 Tetrahedra in the Highly Condensed Nitridosilicate BaSi 7 N 10|url=http://doi.wiley.com/10.1002/chem.19970030213|journal=Chemistry - A European Journal|language=en|volume=3|issue=2|pages=249–252|doi=10.1002/chem.19970030213|pmid=24022955|bibcode=1997ChEuJ...3..249H |via=|url-access=subscription}}</ref> |- | |Ba₆Si₆N₁₀O₂(CN₂) | | |''P''{{Overbar|6}} |''a'' = 16.255, ''c'' = 5.469, ''Z'' = 3 | | |yellow, grown in liquid sodium |<ref>{{Cite journal|last1=Pagano|first1=Sandro|last2=Oeckler|first2=Oliver|last3=Schröder|first3=Thorsten|last4=Schnick|first4=Wolfgang|date=June 2009|title=Ba 6 Si 6 N 10 O 2 (CN 2) - A Nitridosilicate with a NPO-Zeolite Structure Type Containing Carbodiimide Ions|url=http://doi.wiley.com/10.1002/ejic.200900157|journal=European Journal of Inorganic Chemistry|language=en|volume=2009|issue=18|pages=2678–2683|doi=10.1002/ejic.200900157|bibcode=2009EJIC.2009.2678P |via=|url-access=subscription}}</ref> |- | |BaMg₃SiN₄ | | |''P''{{Overbar|1}} |a = 3.451 b = 6.069 c = 6.101 α = 85.200 β = 73.697 γ = 73.566° Z=1 | | | |<ref>{{cite journal |last1=Schmiechen |first1=Sebastian |last2=Strobel |first2=Philipp |last3=Hecht |first3=Cora |last4=Reith |first4=Thomas |last5=Siegert |first5=Markus |last6=Schmidt |first6=Peter J. |last7=Huppertz |first7=Petra |last8=Wiechert |first8=Detlef |last9=Schnick |first9=Wolfgang |title=Nitridomagnesosilicate Ba[Mg 3 SiN 4 ]:Eu 2+ and Structure–Property Relations of Similar Narrow-Band Red Nitride Phosphors |journal=Chemistry of Materials |date=10 March 2015 |volume=27 |issue=5 |pages=1780–1785 |doi=10.1021/cm504604d}}</ref> |- | |Ba₂AlSi₅N₉ | |triclinic |''P''1 |''a'' = 9.860 ''b'' = 10.320 ''c'' = 10.346 α = 90.37° β = 118.43° γ = 103.69° ''Z'' = 4 | | | |<ref>{{Cite journal |last1=Kechele |first1=Juliane A. |last2=Hecht |first2=Cora |last3=Oeckler |first3=Oliver |last4=Schmedt auf der Günne |first4=Jörn |last5=Schmidt |first5=Peter J. |last6=Schnick |first6=Wolfgang |date=2009-04-14 |title=Ba 2 AlSi 5 N 9 —A New Host Lattice for Eu 2+ -Doped Luminescent Materials Comprising a Nitridoalumosilicate Framework with Corner- and Edge-Sharing Tetrahedra |url=https://pubs.acs.org/doi/10.1021/cm803233d |journal=Chemistry of Materials |language=en |volume=21 |issue=7 |pages=1288–1295 |doi=10.1021/cm803233d |issn=0897-4756|url-access=subscription }}</ref> |- | |Ba₅Si₁₁Al₇N₂₅ | | |''Pnnm'' |''a'' = 9.5923, ''b'' = 21.3991, ''c'' = 5.8889 Å ''Z'' = 2 | | |with Eu yellow emission |<ref name=":5">{{Cite journal|last1=Hirosaki|first1=Naoto|last2=Takeda|first2=Takashi|last3=Funahashi|first3=Shiro|last4=Xie|first4=Rong-Jun|date=2014-07-22|title=Discovery of New Nitridosilicate Phosphors for Solid State Lighting by the Single-Particle-Diagnosis Approach|journal=Chemistry of Materials|language=en|volume=26|issue=14|pages=4280–4288|doi=10.1021/cm501866x|issn=0897-4756|doi-access=free}}</ref> |- | |BaSi₄Al₃N₉ | | |''P''2₁/''C'' |''a'' = 5.8465, ''b'' = 26.726, ''c'' = 5.8386 Å, β = 118.897° and ''Z'' = 4 | | |with Eu blue emission |<ref name=":5" /> |- | || BaScSi₄N₇ | | | | | | | |<ref name=":0" /> |- | || BaYSi₄N₇ | | | | | | | |<ref name=":0" /> |- | || LaSi₃N₅ | |orthorhombic |''P''2₁2₁2₁ | ''a''=7.853 ''b''=11.264 ''c''=4.8172 | | | |<ref name=":0" /><ref name=":17">{{Cite journal |last=Woike |first=Michael |last2=Jeitschko |first2=Wolfgang |date=October 1995 |title=Preparation and Crystal Structure of the Nitridosilicates Ln3Si6N11 (Ln = La, Ce, Pr, Nd, Sm) and LnSi3N5 (Ln = Ce, Pr, Nd) |url=https://pubs.acs.org/doi/abs/10.1021/ic00125a005 |journal=Inorganic Chemistry |language=en |volume=34 |issue=21 |pages=5105–5108 |doi=10.1021/ic00125a005 |issn=0020-1669|url-access=subscription }}</ref> |- | || La₃Si₆N₁₁ | |tetragonal |''P''4''bm'' | | | | |<ref name=":0" /> |- | |La₅Si₃N₉ | | | | | | | |<ref name=":7" /> |- | |La₇Si₆N₁₅ | | | | | | | |<ref name=":7" /> |- | |Li₅La₅Si₄N₁₂ | |tetragonal |''P''{{overbar|4}}''b''2 |''a'' = 11.043 ''c'' = 5.573 ''Z'' = 2 | | | |<ref name=":16">{{Cite journal |last1=Lupart |first1=Saskia |last2=Zeuner |first2=Martin |last3=Pagano |first3=Sandro |last4=Schnick |first4=Wolfgang |date=June 2010 |title=Chain-Type Lithium Rare-Earth Nitridosilicates – Li 5 Ln 5 Si 4 N 12 with Ln = La, Ce |url=https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/ejic.201000245 |journal=European Journal of Inorganic Chemistry |language=en |volume=2010 |issue=18 |pages=2636–2641 |doi=10.1002/ejic.201000245 |issn=1434-1948|url-access=subscription }}</ref> |- |calcium lanthanum nitridosilicate |CaLaSiN₃ | | | | | | |Ca can be substituted by Yb or Eu |<ref>{{cite journal |last1=ten Kate |first1=O M |last2=Hintzen |first2=H T |last3=van der Kolk |first3=E |title=Low energy 4f-5d transitions in lanthanide doped CaLaSiN 3 with low degree of cross-linking between SiN 4 tetrahedra |journal=Journal of Physics: Condensed Matter |date=24 September 2014 |volume=26 |issue=38 |article-number=385502 |doi=10.1088/0953-8984/26/38/385502|pmid=25186054 |bibcode=2014JPCM...26L5502T |s2cid=29879915 }}</ref> |- | |CaLaSi₄N₇ | | | | | | | |<ref name=":0" /> |- | |CeSi₃N₅ | |orthorhombic |''P''2₁2₁2₁ | | | | |<ref name=":7" /><ref name=":17" /> |- | |Ce₃Si₆N₁₁ | |tetragonal |''P''4''bm'' | | | | |<ref name=":7" /> |- | |Ce₃Si₅N₉ | | | | | | | |<ref name=":7" /> |- | |Ce₇Si₆N₁₅ | |triclinic | | | | | |<ref name=":7" /> |- | |Ce₇Si₆N₁₅ | |trigonal | | | | | |<ref name=":7" /> |- | |Li₅Ce₅Si₄N₁₂ | |tetragonal |''P''{{overbar|4}}''b''2 |''a'' = 10.978 ''c'' = 5.514 ''Z'' = 2 | | | |<ref name=":16" /> |- | |PrSi₃N₅ | |orthorhombic |''P''2₁2₁2₁ | | | | |<ref name=":17" /> |- | |Pr₃Si₆N₁₁ | |tetragonal |''P''4''bm'' | | | | |<ref name=":7" /> |- | |Pr₅Si₃N₉ | | | | | | | |<ref name=":7" /> |- | |Pr₇Si₆N₁₅ | | | | | | | |<ref name=":7" /> |- | |NdSi₃N₅ | |orthorhombic |''P''2₁2₁2₁ | | | | |<ref name=":17" /> |- | |Nd₃Si₆N₁₁ | |tetragonal |''P''4''bm'' | | | | |<ref name=":17" /> |- | |Ba₂Nd₇Si₁₁N₂₃ | | | | | | |dark blue |<ref>{{Cite journal|last1=Huppertz|first1=Hubert|last2=Schnick|first2=Wolfgang|date=1997-12-15|title=Ba2Nd7Si11N23—A Nitridosilicate with a Zeolite-Analogous Si–N Structure|url=http://doi.wiley.com/10.1002/anie.199726511|journal=Angewandte Chemie International Edition in English|language=en|volume=36|issue=23|pages=2651–2652|doi=10.1002/anie.199726511|issn=0570-0833|url-access=subscription}}</ref> |- | |Sm₃Si₆M₁₁ | |tetragonal |''P''4''bm'' |''a''=9.997 ''c''=4.836 | | | |<ref name=":7" /><ref name=":17" /> |- | |Ca₃Sm₃[Si₉N₁₇] | |cubic |P4_3m |''a''=7.3950; ''Z''=1 |404.4 | | |<ref name=":11">{{Cite journal|last1=Huppertz|first1=Hubert|last2=Oeckler|first2=Oliver|last3=Lieb|first3=Alexandra|last4=Glaum|first4=Robert|last5=Johrendt|first5=Dirk|last6=Tegel|first6=Marcus|last7=Kaindl|first7=Reinhard|last8=Schnick|first8=Wolfgang|date=2012-08-27|title=Ca 3 Sm 3 [Si 9 N 17 ] and Ca 3 Yb 3 [Si 9 N 17 ] Nitridosilicates with Interpenetrating Nets that Consist of Star-Shaped [N [4] (SiN 3) 4 ] Units and [Si 5 N 16 ] Supertetrahedra|url=http://doi.wiley.com/10.1002/chem.201200813|journal=Chemistry - A European Journal|language=en|volume=18|issue=35|pages=10857–10864|doi=10.1002/chem.201200813|pmid=22829445|bibcode=2012ChEuJ..1810857H |url-access=subscription}}</ref> |- | |Eu₂SiN₃ | | |''Cmca'' |''a'' = 5.42, ''b'' = 10.610, ''c'' = 11.629, ''Z'' = 8 | | | |<ref name=":7" /><ref>{{Cite journal|last1=Zeuner|first1=Martin|last2=Pagano|first2=Sandro|last3=Matthes|first3=Philipp|last4=Bichler|first4=Daniel|last5=Johrendt|first5=Dirk|last6=Harmening|first6=Thomas|last7=Pöttgen|first7=Rainer|last8=Schnick|first8=Wolfgang|date=2009-08-12|title=Mixed Valence Europium Nitridosilicate Eu 2 SiN 3|url=https://pubs.acs.org/doi/10.1021/ja9040237|journal=Journal of the American Chemical Society|language=en|volume=131|issue=31|pages=11242–11248|doi=10.1021/ja9040237|pmid=19610643|bibcode=2009JAChS.13111242Z |issn=0002-7863|url-access=subscription}}</ref> |- |dieuropium penta siliconoctanitride |Eu₂Si₅N₈ | |orthorhombic |''Pnm''2₁ |a=5.7094 b=6.8207 c=9.3291 Z=2 |363.29 |5.087 |red |<ref name=":7" /><ref name=":9">{{Cite journal|last1=Huppertz|first1=H.|last2=Schnick|first2=W.|date=1997-12-15|title=Eu 2 Si 5 N 8 and EuYbSi 4 N 7 . The First Nitridosilicates with a Divalent Rare Earth Metal|url=http://scripts.iucr.org/cgi-bin/paper?S0108270197008767|journal=Acta Crystallographica Section C Crystal Structure Communications|volume=53|issue=12|pages=1751–1753|doi=10.1107/S0108270197008767|bibcode=1997AcCrC..53.1751H |issn=0108-2701|url-access=subscription}}</ref> |- | |EuMg₃SiN₄ | | |''I''4₁/''a'' |''a'' = 11.511 ''c'' = 13.552 Z=16 | | | |<ref name=":15" /> |- | |Ca₃Yb₃[Si₉N₁₇] | |cubic |P4_3m |a=730.20 Z=1 |389.3 | | |<ref name=":11" /> |- | |BaYbSi₄N₇ | | | | | | |includes NSi₄ clusters |<ref name=":7" /><ref>{{Cite journal|last1=Huppertz|first1=Hubert|last2=Schnick|first2=Wolfgang|date=1996-09-20|title=BaYbSi4N7—Unexpected Structural Possibilities in Nitridosilicates|url=http://doi.wiley.com/10.1002/anie.199619831|journal=Angewandte Chemie International Edition in English|language=en|volume=35|issue=17|pages=1983–1984|doi=10.1002/anie.199619831|issn=0570-0833|url-access=subscription}}</ref> |- |europium ytterbium tetrasiliconheptanitride |EuYbSi₄N₇ | |hexagonal |''P''6₃''mc'' |a=5.9822 c=9.7455 |302.03 |5.887 |brown |<ref name=":7" /><ref name=":9" /> |- | |SrYbSi₄N₇ | | | | | | | |<ref name=":7" /> |- | |EuYbSi₄N₇ | | | | | | | |<ref name=":7" /> |- | || CaLuSi₄N₇ | | | | | | | |<ref name=":0" /> |- | || SrLuSi₄N₇ | | | | | | | |<ref name=":0" /> |- | || BaLuSi₄N₇ | | | | | | | |<ref name=":0" /> |- | |Pb₂Si₅N₈ |666.90 |orthorhombic |''Pmn''2₁ |a = 5.774 b = 6.837 c = 9.350 |269.11 |6.001 |Pb-Pb dumbbells |<ref name=":8" /> |- |}

==References== {{Reflist}}

{{Silicides}}

[[Category:Silicon compounds]] [[Category:Nitrogen compounds]]