Galena
| Galena (leid glance) | |
|---|---|
 Galena | |
| 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 | edit soorce]- ↑ 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. Archived frae the original (PDF) on 17 September 2009. Retrieved 6 December 2013.CS1 maint: multiple names: eeditors leet (link)
- ↑ Galena. Webmineral
- ↑ Galena. Mindat.org