Fluor-buergerite

{{Infobox mineral | name = Fluor-buergerite | image = Buergerite-179849.jpg | imagesize = 170px | category = Cyclosilicate <br/>tourmaline | formula = NaFe³⁺₃Al₆(BO₃)₃Si₆O₁₈(O,F,OH)₄ | IMAsymbol = Fbu<ref>{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|journal=Mineralogical Magazine|volume=85|issue=3|pages=291–320|doi=10.1180/mgm.2021.43|bibcode=2021MinM...85..291W|s2cid=235729616|doi-access=free}}</ref> | strunz = 9.CK.05 | color = Bronze, Dark Brown, Black, Dark Purple | system = Trigonal | class = Ditrigonal pyramidal (3m) <br/>H-M symbol: (3m) | symmetry = ''R3m'' | cleavage = Distinct prismatic | mohs = 7 | refractive = nω = 1.735 nε = 1.655 | opticalprop = Uniaxial (-) | birefringence = δ = 0.080 | streak = yellowish brown | gravity = 3.31 | diaphaneity = Translucent | other = Pyroelectric and piezoelectric | references = <ref name=Handbook>[http://rruff.geo.arizona.edu/doclib/hom/buergerite.pdf Handbook of Mineralogy]</ref><ref name=Mindat>[http://www.mindat.org/min-818.html Mindat]</ref><ref name=Webmineral>[http://www.webmineral.com/data/Buergerite.shtml Webmineral data]</ref> }} '''Fluor-buergerite''',<ref>{{Cite journal |journal=American Mineralogist |volume=96 |pages=895–913 |year=2011 |title=Nomenclature of the tourmaline-supergroup minerals |author1=Darrell J. Henry |author2=Milan Novák |author3=Frank C. Hawthorne |author4=Andreas Ertl |author5=Barbara L. Dutrow |author6=Pavel Uher |author7=Federico Pezzotta |issue=5–6 |doi=10.2138/am.2011.3636 |bibcode=2011AmMin..96..895H |s2cid=38696645 |url=http://pubsites.uws.edu.au/ima-cnmnc/henry%20et%20al%202011%20tourmaline%20tomenclature.pdf |access-date=2012-04-18 |archive-date=2012-03-26 |archive-url=https://web.archive.org/web/20120326093327/http://pubsites.uws.edu.au/ima-cnmnc/henry%20et%20al%202011%20tourmaline%20tomenclature.pdf |url-status=dead }}</ref> originally named buergerite, is a mineral species belonging to the tourmaline group. It was first described for an occurrence in rhyolitic cavities near Mexquitic, San Luis Potosi, Mexico. It was approved as a mineral in 1966 by the IMA and named in honor of Martin J. Buerger (1903–1986), professor of mineralogy at the Massachusetts Institute of Technology. It has also been reported from Minas Gerais, Brazil, and the Central Bohemia Region of the Czech Republic.<ref name=Handbook/><ref name=Mindat/><ref name=Webmineral/>

==References== <references/>

{{Commons category|Buergerite|lcfirst=yes}}

Category:Sodium minerals Category:Cyclosilicates Category:Trigonal minerals Category:Minerals in space group 160 Category:Tourmalines

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