{{redirects|Samarium phosphide|the pentaphosphide|Samarium pentaphosphide}} {{Chembox <!-- Images --> | ImageFile = | ImageSize = 200px | ImageAlt = <!-- Names --> | IUPACName = | OtherNames = Phosphanylidynesamarium, samarium monophosphide <!-- Sections --> | Section1 = {{Chembox Identifiers | CASNo = 12066-50-1 | PubChem = 82905 | ChemSpiderID = 74806 | EINECS = 235-069-8 | UNNumber = | SMILES = P#[Sm] | StdInChI= 1S/P.Sm | StdInChIKey= QRVXKVFNBYFEOG-UHFFFAOYSA-N }} | Section2 = {{Chembox Properties | Sm=1|P=1 | Appearance = Crystals | Density = 6.3 g/cm<sup>3</sup> | MolarMass = 181.3 | Solubility = Insoluble | MeltingPtC = | BoilingPtC = | VaporPressure = }} | Section4 = {{Chembox Structure | CrystalStruct = Cubic }} | Section7 = {{Chembox Hazards | MainHazards = | GHSPictograms = | GHSSignalWord = | HPhrases = | PPhrases = | FlashPtC = | AutoignitionPt = }} | Section9 = {{Chembox Related | OtherAnions = Samarium nitride<br>Samarium arsenide<br>Samarium antimonide<br>Samarium bismuthide | OtherCations = Neodymium phosphide<br>Europium phosphide | OtherFunction = | OtherFunction_label = | OtherCompounds = }} }} '''Samarium(III) phosphide''' is an inorganic compound of samarium and phosphorus with the chemical formula '''SmP'''.<ref name="AA">{{cite web |title=Samarium Phosphide |url=https://www.americanelements.com/samarium-phosphide-12066-50-1 |publisher=American Elements |access-date=21 December 2021 |language=en}}</ref><ref>{{cite book |title=Toxic Substances Control Act (TSCA) Chemical Substance Inventory |date=1979 |publisher=U.S. Government Printing Office |page=49 |url=https://books.google.com/books?id=EwXoYmUt_B0C&dq=samarium+phosphide+SmP&pg=RA2-PA49 |access-date=21 December 2021 |language=en}}</ref><ref>{{cite book |last1=Freeman |first1=A. J. |title=The Actinides: Electronic Structure and Related Properties |date=2 December 2012 |publisher=Elsevier |isbn=978-0-323-15304-1 |page=201 |url=https://books.google.com/books?id=Z1MdFPbbsBYC&dq=samarium+phosphide+SmP&pg=PA201 |access-date=21 December 2021 |language=en}}</ref>
==Synthesis== Samarium(III) phosphide can be obtained by heating samarium and phosphorus: :: 4 Sm + P<sub>4</sub> → 4 SmP
==Physical properties== Samarium(III) phosphide forms crystals of a cubic system, space group ''Fm''3''m'', cell size a = 0.5760 nm, Z = 4, with a structure similar to sodium chloride NaCl.<ref>{{cite book |last1=Donnay |first1=Joseph Désiré Hubert |title=Crystal Data; Determinative Tables |date=1963 |publisher=American Crystallographic Association |page=888 |url=https://books.google.com/books?id=x5ghAQAAMAAJ&dq=samarium+phosphide+SmP&pg=PA888 |access-date=21 December 2021 |language=en}}</ref>
The compound exists in the temperature range of 1315–2020 °C and has a homogeneity region described by the SmP<sub>1÷0.982</sub>.<ref>{{cite book |last1=Predel |first1=B. |title=Ni-Np – Pt-Zr |chapter=P-Sm (Phosphorus-Samarium) |chapter-url=https://materials.springer.com/lb/docs/sm_lbs_978-3-540-70692-2_2381 |website=Ni-Np – Pt-Zr |series=Landolt-Börnstein - Group IV Physical Chemistry |access-date=21 December 2021 |pages=1 |language=en |doi=10.1007/10542753_2381 |date=1998|isbn=3-540-61712-4 }}</ref>
==Chemical properties== Samarium(III) phosphide readily dissolves in nitric acid.<ref>{{cite book |title=Soviet Progress in Chemistry |date=1966 |publisher=Faraday Press |page=91 |url=https://books.google.com/books?id=QLBaAAAAYAAJ&q=samarium+phosphide+SmP |access-date=21 December 2021 |language=en}}</ref>
==Uses== Samarium(III) phosphide compound is a semiconductor used in high power, high frequency applications and in laser diodes.<ref name="AA"/>
==References== {{Reflist}}
{{Samarium compounds}} {{Phosphorus compounds}} {{Phosphides}}
Category:Phosphides Category:Samarium(III) compounds Category:Semiconductors Category:Rock salt crystal structure