Galena

Galena
Galena
	Galena with minor pyrite
General
Category	Sulfide mineral
Formula; (repeating unit)	PbS
IMA symbol	Gn
Strunz classification	2.CD.10
Dana classification	2.8.1.1
Crystal system	Cubic
Crystal class	Hexoctahedral (m3m) ; H–M symbol: (4/m 3 2/m)
Space group	Fm3m
Unit cell	a = 5.936 Å; Z = 4
Identification
Color	Lead gray and silvery
Crystal habit	Cubes and octahedra, blocky, tabular and sometimes skeletal crystals
Twinning	Contact, penetration and lamellar
Cleavage	Cubic perfect on {001}, parting on {111}
Fracture	Subconchoidal
Tenacity	Brittle
Mohs scale hardness	2.5–2.75
Luster	Metallic on cleavage planes
Streak	Lead gray
Diaphaneity	Opaque
Specific gravity	7.2–7.6
Optical properties	Isotropic and opaque
Fusibility	2
Other characteristics	Natural semiconductor
References

Galena, also called lead glance, is the natural mineral form of lead(II) sulfide (PbS). It is the most important ore of lead and an important source of silver.^[5]

Galena is one of the most abundant and widely distributed sulfide minerals. It crystallizes in the cubic crystal system often showing octahedral forms. It is often associated with the minerals sphalerite, calcite and fluorite.

^ 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.
^ Anthony, John W.; Bideaux, Richard A.; Bladh, Kenneth W.; Nichols, Monte C., eds. (1990). "Galena". Handbook of Mineralogy (PDF). Vol. 1. Chantilly, VA: Mineralogical Society of America. ISBN 0962209708.
^ "Galena". Webmineral.
^ Galena. Mindat.org
^ Young, Courtney A.; Taylor, Patrick R.; Anderson, Corby G. (2008). Hydrometallurgy 2008: Proceedings of the Sixth International Symposium. SME. ISBN 9780873352666.

[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.

[HBM-2] Anthony, John W.; Bideaux, Richard A.; Bladh, Kenneth W.; Nichols, Monte C., eds. (1990). "Galena". Handbook of Mineralogy (PDF). Vol. 1. Chantilly, VA: Mineralogical Society of America. ISBN 0962209708.

[Webmineral-3] "Galena". Webmineral.

[Mindat-4] Galena. Mindat.org

[:0-5] Young, Courtney A.; Taylor, Patrick R.; Anderson, Corby G. (2008). Hydrometallurgy 2008: Proceedings of the Sixth International Symposium. SME. ISBN 9780873352666.

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