Difference between revisions of "Galena"
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| nameorigin=From the [[Latin]] ''galena'', which was applied to [[lead]] [[ore]] or the [[dross]] from melted lead. | | nameorigin=From the [[Latin]] ''galena'', which was applied to [[lead]] [[ore]] or the [[dross]] from melted lead. | ||
}} | }} | ||
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Chesterman, pp. 361-362 | Chesterman, pp. 361-362 | ||
Revision as of 22:37, December 14, 2009
| Galena | |
|---|---|
| |
| Chemical name | Lead sulfide |
| Chemical formula | PbS |
| Identification | |
| Colors | Dark lead-gray; metallic when fresh |
| Crystal habit | Commonly in cubes and octahedrons; dodecahedrons less frequent; also massive and in cleavage fragments, coarse- or fine-grained, fibrous |
| Crystal system | Isometric |
| Cleavage | Cubic cleavage |
| Fracture | Subconchoidal, (rare); brittle |
| Hardness | 2.5 |
| Name origin | From the Latin galena, which was applied to lead ore or the dross from melted lead. |
| Specific gravity | 7.4 to 7.6 |
| Streak | Dark lead-gray |
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)