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. | ||
}} | }} | ||
| − | '''Galena''' is a [[mineral]] whose main component is lead sulfide. It is an important [[ore]] of [[lead]]. Some samples also contain [[silver]].<ref>http://geology.com/minerals/galena.shtml</ref> | + | '''Galena''' is a [[mineral]] whose main component is lead [[sulfide]]. It is an important [[ore]] of [[lead]]. Some samples also contain [[silver]].<ref>http://geology.com/minerals/galena.shtml</ref> |
==Sources== | ==Sources== | ||
Latest revision as of 23:29, April 4, 2017
| 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 |
Galena is a mineral whose main component is lead sulfide. It is an important ore of lead. Some samples also contain silver.[1]
Sources
Further reading
- Chesterman, Charles W. pp. 361–362 The Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf: New York (1987)