Playfairite

{{Infobox mineral | name = Playfairite | category = Sulfosalt minerals, Sulfides | image = Playfairite.jpg | imagesize = | caption = | formula = Pb₁₆Sb₁₈S₄₃ | IMAsymbol = Pyf<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> | molweight = | dana = 3.6.4.1 | strunz = 2.LB.30 (10 ed) <br /><small>2/E.20-40 (8 ed)</small> | system = Monoclinic <br/>Unknown space group | color = Lead gray to black | habit = | twinning = | cleavage = Perfect | fracture = | tenacity = | mohs = 3.5-4 | luster = Metallic | polish = | refractive = | opticalprop = | birefringence = | dispersion = | pleochroism = Strong reflection | fluorescence= | absorption = | streak = Black | gravity = 5.72 | density = | melt = | fusibility = | diagnostic = | solubility = | diaphaneity = | other = | references = <ref name=Jambor1967> {{cite journal |url= http://rruff.geo.arizona.edu/doclib/cm/vol9/CM9_191.pdf |author= Jambor, J.L. |year= 1967 |title= New lead sulfantimonides from Madoc, Ontario; Part 2, Mineral descriptions |journal = Canadian Mineralogist |volume= 9 |pages= 194–196}}</ref> }}

'''Playfairite''' is a rare sulfosalt mineral with chemical formula Pb₁₆Sb₁₈S₄₃ in the monoclinic crystal system,<ref name=mindat>{{cite web |url= http://www.mindat.org/min-3239.html |publisher= Mindat |title= Information page for Playfairite}}</ref><ref name=webmineral>{{cite web |url= http://webmineral.com/data/Playfairite.shtml |publisher= Webmineral |title= Information page for Playfairite}}</ref> named after the Scottish scientist and mathematician John Playfair.<ref name=handbookofmineralogy>{{cite web |url= http://www.handbookofmineralogy.org/pdfs/playfairite.pdf |publisher= Handbook of Mineralogy |title= Information page for Playfairite}}</ref> It was discovered in 1966 by the Canadian mineralogist John Leslie Jambor.<ref name=Jambor1967/><ref name=New>{{citation |url=http://www.minsocam.org/ammin/AM53/AM53_1421.pdf |author=Michael Fleischer |year=1968 |title=New Mineral Names |journal=American Mineralogist|volume=53 |page=1424}}</ref><ref name=Jambor2008>[http://www.minsocam.org/msa/ammin/toc/Abstracts/2008_Abstracts/Apr08_Abstracts/Jambor_p710_08.pdf Lynne Jambor and John Dutrizac (2008), ''Memorial of John L. Jambor (1936-2008)'', American Mineralogist, vol. 93, pp. 710-712]</ref> Lead gray to black in color, its luster is metallic. Playfairite shows strong reflection pleochroism from white to brownish gray. Playfairite has a hardness of 3.5 to 4 on Mohs scale and a specific gravity of approximately 5.72.<ref name=mindat />

The type locality is Taylor Pit (Concession XIV; Lot 13), Huntingdon Township, Hastings County in Ontario, Canada.<ref name=mindat/> Small deposits have also been found in Les Cougnasses Mine, Orpierre in the Haut-Alpes in France, Khaidarkan Sb-Hg deposit (Chaidarkan), Fergana Valley, Alai Range, Osh Oblast, Kyrgyzstan and Reese River District, Lander County, Nevada, USA.<ref name=mindat/>

== See also == *List of minerals recognized by the International Mineralogical Association

==References== {{reflist}}

{{wiktionary}}

Category:Sulfosalt minerals Category:Lead minerals Category:Monoclinic minerals

Category:Antimony minerals