Galena

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Galena (leid glance)
Calcite-Galena-elm56c.jpg
Galena close-up
General
Category Sulfide mineral
Formula
(repeating unit)
PbS
Strunz classification 02.CD.10
Dana classification 2.8.1.1
Crystal symmetry Isometric H–M symbol 4/m 3 2/m
Unit cell a = 5.936 Å; Z = 4
Identification
Color Lead gray an sillery
Crystal habit Cubes an octahedra, tabular an sometimes skeletal crystals
Crystal seestem Cubic Hexoctahedral cF8, space group Fm3m, No. 225
Twinnin Contact, penetration an lamellar
Cleavage Cubic perfect on [001], pairtin on [111]
Fractur Subconchoidal
Tenacity Brittle
Mohs scale hairdness 2.5–2.75
Luster Metallic
Streak Lead gray
Diaphaneity Opaque
Specific gravity 7.2–7.6
Optical properties Isotropic an opaque
Fusibility 2
References [1][2][3]

Galena is the naitural mineral form o lead(II) sulfide. It is the maist important lead ore mineral.

Galena is ane o the maist abundant an widely distributit sulfide minerals. It crystallizes in the cubic crystal seestem eften shawin octahedral furms. It is eften associatit wi the minerals sphalerite, calcite an fluorite.

References[eedit | eedit soorce]

  1. Anthony, John W.; Bideaux, Richard A.; Bladh, Kenneth W. and Nichols, Monte C., ed. (1990). "Galena" (PDF). Handbook of Mineralogy. I (Elements, Sulfides, Sulfosalts). Chantilly, VA, US: Mineralogical Society of America. ISBN 0962209708. 
  2. Galena. Webmineral
  3. Galena. Mindat.org