Synchysite

{{Infobox mineral | name = Synchysite | boxwidth = | boxbgcolor = | image = Synchysite-107154.jpg | imagesize = 260 | alt = | caption = A synchysite with unknown end-member composition | category = | formula = Ca(REE)(CO₃)₂F | strunz = 5.BD. | dana = | system = Monoclinic and trigonal | symmetry = ''C2/c'' (monoclinic) | unit cell = | molweight = | color = | colour = | habit = | twinning = | cleavage = | fracture = | tenacity = | mohs = 4.5 | luster = | streak = | diaphaneity = | gravity = | density = | polish = | opticalprop = | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = <ref name=handbookofmineralogy>{{cite web|title=Synchysite-(Ce)|url=http://www.handbookofmineralogy.org/pdfs/synchysite-(Ce).pdf|work=handbookofmineralogy|accessdate=24 February 2013}}</ref><ref>{{cite journal |last1=Wang |first1=L. |last2=Ni |first2=Y. |last3=Hughes |first3=J.M. |last4=Bayliss |first4=P. |last5=Drexler |first5=J.W. |journal=The Canadian Mineralogist |volume=32 |year=1994 |pages=865–871 |title=The atomic arrangement of synchysite-(Ce), CeCaF(CO3)2 |url=https://pubs.geoscienceworld.org/canmin/article-abstract/32/4/865/12586 |access-date=30 December 2020}}</ref> }} '''Synchysite''' is a group of carbonate minerals.<ref name="Mindat Synchysite Group">{{cite web|title=Synchysite Group|url=http://www.mindat.org/min-32183.html|accessdate=24 February 2013}}</ref> The three isostructural chemical end members are synchysite-(Ce), synchysite-(Nd) and synchysite-(Y). Huanghoite-(Ce) belongs to the group, but has a different symmetry and calcium is replaced by barium.<ref name="Mindat Synchysite-(Ce)">{{cite web|title=Synchysite-(Ce)|url=http://www.mindat.org/min-3853.html|accessdate=24 February 2013}}</ref><ref name="Mindat Huanghoite-(Ce)">{{cite web|title=Huanghoite-(Ce)|url=http://www.mindat.org/min-1938.html|accessdate=24 February 2013}}</ref> {| class="wikitable" style="text-align:center;" |+ Synchesite group |- ! scope=col | Mineral name ! scope=col | Chemical formula ! scope=col | Symmetry ! scope=col | Space group |- | Huanghoite-(Ce) || {{chem|BaCe(CO|3|)|2|F}} || <math>3\;2/m</math> || <math>R\;\overline{3}\;m</math> |- | Synchysite-(Ce) || {{chem|Ca(Ce,La)(CO|3|)|2|F}} || <math>2/m</math> || <math>C\;2/c</math> |- | Synchysite-(Nd) || {{chem|CaNd(CO|3|)|2|F}} || <math>2/m</math> || <math>C\;2/c</math> |- | Synchysite-(Y) || {{chem|CaY(CO|3|)|2|F}} || <math>2/m</math> || <math>C\;2/c</math> |}

==References== {{Reflist}}

Category:Carbonate minerals Category:Monoclinic minerals Category:Minerals in space group 15