Galena

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Galena (leid glance)
Calcite-Galena-elm56c.jpg
Galena close-up
General
Category Sulfide meeneral
Formula
(repeatin unit)
PbS
Strunz clessification 02.CD.10
Dana clessification 2.8.1.1
Creestal seestem Cubic Hexoctahedral cF8, space group Fm3m, No. 225
Space group Isometric H–M symbol 4/m 3 2/m
Unit cell a = 5.936 Å; Z = 4
Identification
Colour Lead gray an siller-like
Creestal habit Cubes an octahedra, tabular an whiles skeletal crystals
Twinnin Contact, penetration an lamellar
Cleavage Cubic perfect on [001], pairtin on [111]
Fractur Subconchoidal
Tenacity Brickle
Mohs scale haurdness 2.5–2.75
Skinkle Metallic
Streak Lead gray
Diaphaneity Opaque
Speceefic 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 meenerals. It crystallizes in the cubic crystal seestem aften shawin octahedral furms. It is aften associatit wi the meenerals 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". Handbook of Mineralogy (PDF). I (Elements, Sulfides, Sulfosalts). Chantilly, VA, US: Mineralogical Society of America. ISBN 0962209708. 
  2. Galena. Webmineral
  3. Galena. Mindat.org