Dolomite
Dolomite /ˈdɒləmaɪt/ is a carbonate mineral componed o calcium magnesium carbonate CaMg(CO3)2. The wird dolomite is forbye uised for tae describe the sedimentary carbonate rock, that is componed predominantly o the mineral dolomite (itherwise kent as dolostone).
| Dolomite | |
|---|---|
 Dolomite and magnesite – Spain | |
| General | |
| Category | Carbonate mineral |
| Formula (repeatin unit) | (CaMg)(CO3)2 |
| Strunz clessification | 05.AB.10 |
| Creestal seestem | Trigonal |
| Space group | Trigonal rhombohedral, 3 |
| Unit cell | a = 4.8012(1) Å, c = 16.002 Å; Z = 3 |
| Identification | |
| Colour | White, gray tae pink |
| Creestal habit | Tabular crystals, aften wi curved faces, columnar, stalactitic, granular, massive. |
| Twinnin | Common as simple contact twins |
| Cleavage | Perfect on {1011}, rhombohedral cleavage |
| Fractur | Conchoidal |
| Tenacity | Brickle |
| Mohs scale haurdness | 3.5 tae 4 |
| Skinkle | Vitreous tae pearly |
| Streak | White |
| Speceefic 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 |
| Ither chairacteristics | Mey fluoresce white tae pink unner UV; triboluminescent. |
| References | [1][2][3][4] |
References
eedit- ↑ 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.
- ↑ Dolomite. Handbook of Mineralogy. (PDF) . Retrieved on 2011-10-10.
- ↑ Dolomite. Webmineral. Retrieved on 2011-10-10.
- ↑ Dolomite. Mindat.org. Retrieved on 2011-10-10.