Difference between revisions of "Galena"
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| − | {{Mineral | name=Galena | cdesc=Lead sulfide | formula=PbS | cluster=Dark lead-gray; metallic; streak: dark lead-gray | hardness=2 1/2 | cleavage=Perfect in three directions at 90º | fracture | + | {{Mineral | name=Galena | cdesc=Lead sulfide | formula=PbS | cluster=Dark lead-gray; metallic; streak: dark lead-gray | hardness=2 1/2 | cleavage=Perfect in three directions at 90º | odata=''fracture'' subconchoidal (rare); brittle| sgravity=7.4 to 7.6 | crystal=Isometric; commonly in [[cubes]] and [[octahedrons]]; [[dodecahedrons]] less frequent; also [[massive]] and in cleavage fragments, [[coarse]]- or [[fine-grained]], [[fibrous]] | fmark=Cubic cleavage and lead-gray color | species=The cubic cleavage and dark lead-gray color will distinguish galena from [[sphalerite]], [[jamesonite]], and [[stibnite]]| enviro=Galena is the commonest of all lead minerals and occurs in several environments. | occur=Fine crystals and crystal groups| norigin=From the [[Latin]] ''galena'', which was applied to [[lead]] [[ore]] or the [[dross]] from melted lead. }} |
Chesterman, pp. 361-362 | Chesterman, pp. 361-362 | ||
Revision as of 04:55, April 25, 2007
| Galena | |
|---|---|
| Chemical name | Lead sulfide |
| Chemical formula | PbS |
| Identification | |
| Cleavage | Perfect in three directions at 90º |
| Hardness | 2 1/2 |
| Specific gravity | 7.4 to 7.6 |
Chesterman, pp. 361-362
Sources
- Chesterman, Charles W. The Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf: New York (1987)