Galena

Frae Wikipedia, the free beuk o knawledge
Jump to navigation Jump to search
Galena (leid glance)
Calcite-Galena-elm56c.jpg
Galena close-up
General
CategorySulfide meeneral
Formula
(repeatin unit)
PbS
Strunz clessification02.CD.10
Dana clessification2.8.1.1
Creestal seestemCubic Hexoctahedral cF8, space group Fm3m, No. 225
Space groupIsometric H–M symbol 4/m 3 2/m
Unit cella = 5.936 Å; Z = 4
Identification
ColourLead gray an siller-like
Creestal habitCubes an octahedra, tabular an whiles skeletal crystals
TwinninContact, penetration an lamellar
CleavageCubic perfect on [001], pairtin on [111]
FracturSubconchoidal
TenacityBrickle
Mohs scale haurdness2.5–2.75
SkinkleMetallic
StreakLead gray
DiaphaneityOpaque
Speceefic gravity7.2–7.6
Optical propertiesIsotropic an opaque
Fusibility2
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.CS1 maint: multiple names: eeditors leet (link)
  2. Galena. Webmineral
  3. Galena. Mindat.org