Erlichmanite Knowpia

Erlichmanite
Erlichmanite
General
Category	Pyrite
Formula; (repeating unit)	OsS2
IMA symbol	Erl
Strunz classification	2/D.17-110
Dana classification	2.12.1.16
Crystal system	Isometric
Crystal class	Diploidal
Unit cell	177.47 Å³
Identification
Formula mass	254.33gm
Colour	Grey
Crystal habit	Pyritohedral crystals or grains
Mohs scale hardness	4.5-5.5
Luster	Metallic
Diaphaneity	Opaque
Specific gravity	8.28
Density	8.28 g/cm3 (Measured), 9.59 g/cm3 (Calc)
Pleochroism	Non-pleochromic
Common impurities	Iridium, Rhodium, Ruthenium, Paladium

Erlichmanite is the naturally occurring mineral form of osmium sulfide (OsS₂). It is grey with a metallic luster, hardness around 5, and specific gravity about 9.^[2] It is found in noble metal placer deposits.^[3] Named for Jozef Erlichman, electron microprobe analyst at the NASA Ames Research Center.^[4]

References edit

^ 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.
^ "Erlichmanite".
^ "Erlichmanite Mineral Data".
^ http://www.handbookofmineralogy.org/pdfs/erlichmanite.pdf ^{[bare URL PDF]}

[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] "Erlichmanite".

[3] "Erlichmanite Mineral Data".

[4] ttp://www.handbookofmineralogy.org/pdfs/erlichmanite.pdf ^{[bare URL PDF]}

[2]

[3]

[4]

[1]

Summary

References edit