Dolomite
Dolomite (pípè /ˈdɒləmaɪt/)
| Dolomite | |
|---|---|
 Dolomite | |
| General | |
| Category | Carbonate mineral |
| Chemical formula | CaMg(CO3)2 |
| Identification | |
| Color | white, gray to pink |
| Crystal habit | tabular crystals, often with curved faces, also columnar, stalactitic, granular, massive. |
| Crystal system | trigonal - rhombohedral, bar3 |
| Twinning | common as simple contact twins |
| Cleavage | rhombohedral cleavage (3 planes) |
| Fracture | brittle - conchoidal |
| Mohs scale hardness | 3.5 to 4 |
| Luster | vitreous to pearly |
| Streak | white |
| Specific gravity | 2.84–2.86 |
| Optical properties | Uniaxial (-) |
| Refractive index | nω = 1.679–1.681 nε = 1.500 |
| Birefringence | δ = 0.179–0.181 |
| Solubility | Poorly soluble in dilute HCl unless powdered. |
| Other characteristics | May fluoresce white to pink under UV; triboluminescent. |
| References | [1][2][3][4] |
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Itokasi àtúnṣe
- ↑ Deer, W. A., R. A. Howie and J. Zussman (1966) An Introduction to the Rock Forming Minerals, Longman, pp. 489–493. ISBN 0-582-44210-9.
- ↑ http://rruff.geo.arizona.edu/doclib/hom/dolomite.pdf Handbook of Mineralogy
- ↑ http://webmineral.com/data/Dolomite.shtml Webmineral
- ↑ http://www.mindat.org/min-1304.html Mindat data