Misplaced Pages

Playfairite

Article snapshot taken from Wikipedia with creative commons attribution-sharealike license. Give it a read and then ask your questions in the chat. We can research this topic together.
Playfairite
General
CategorySulfosalt minerals, Sulfides
Formula
(repeating unit)		Pb16Sb18S43
IMA symbolPyf
Strunz classification2.LB.30 (10 ed)
2/E.20-40 (8 ed)
Dana classification3.6.4.1
Crystal systemMonoclinic
Unknown space group
Identification
ColorLead gray to black
CleavagePerfect
Mohs scale hardness3.5-4
LusterMetallic
StreakBlack
Specific gravity5.72
PleochroismStrong reflection
References

Playfairite is a rare sulfosalt mineral with chemical formula Pb16Sb18S43 in the monoclinic crystal system, named after the Scottish scientist and mathematician John Playfair. It was discovered in 1966 by the Canadian mineralogist John Leslie Jambor. 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.

The type locality is Taylor Pit (Concession XIV; Lot 13), Huntingdon Township, Hastings County in Ontario, Canada. 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.

See also

References

  1. Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  2. ^ Jambor, J.L. (1967). "New lead sulfantimonides from Madoc, Ontario; Part 2, Mineral descriptions" (PDF). Canadian Mineralogist. 9: 194–196.
  3. ^ "Information page for Playfairite". Mindat.
  4. "Information page for Playfairite". Webmineral.
  5. "Information page for Playfairite" (PDF). Handbook of Mineralogy.
  6. Michael Fleischer (1968), "New Mineral Names" (PDF), American Mineralogist, 53: 1424
  7. Lynne Jambor and John Dutrizac (2008), Memorial of John L. Jambor (1936-2008), American Mineralogist, vol. 93, pp. 710-712
Categories: