Back Dolomiet Afrikaans Dolomita AN دولوميت (معدن) Arabic Dolomit Azerbaijani Доломит Bashkir Dolomit BAR Даламіт Byelorussian Даляміт BE-X-OLD Доломит Bulgarian Dolomit BS
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| Dolomite | |
|---|---|
&sq=Sri Lanka&lang=en&file=File:Dolomite_Luzenac.jpg) Dolomite (white) on talc | |
| General | |
| Category | Carbonate minerals |
| Formula (repeating unit) | CaMg(CO3)2 |
| IMA symbol | Dol[1] |
| Strunz classification | 5.AB.10 |
| Crystal system | Trigonal |
| Crystal class | Rhombohedral (3) H–M symbol: (3) |
| Space group | R3 |
| Unit cell | a = 4.8012(1), c = 16.002 [Å]; Z = 3 |
| Identification | |
| Color | White, grey to pink, reddish-white, brownish-white; colourless in transmitted light |
| Crystal habit | Tabular crystals, often with curved faces, also columnar, stalactitic, granular, massive. |
| Twinning | Common as simple contact twins |
| Cleavage | 3 directions of cleavage not at right angles |
| Fracture | Conchoidal |
| Tenacity | Brittle |
| Mohs scale hardness | 3.5–4.0 |
| 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 |
| Other characteristics | May fluoresce white to pink under UV; triboluminescent. Ksp values vary between 10−19 and 10−17 |
| References | [2][3][4][5][6] |
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Dolomite (/ˈdɒl.əˌmaɪt, ˈdoʊ.lə-/) is an anhydrous carbonate mineral composed of calcium magnesium carbonate, ideally CaMg(CO3)2. The term is also used for a sedimentary carbonate rock composed mostly of the mineral dolomite (see Dolomite (rock)). An alternative name sometimes used for the dolomitic rock type is dolostone.
- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- ^ 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 Archived 2008-04-09 at the Wayback Machine. Handbook of Mineralogy. (PDF) . Retrieved on 2011-10-10.
- ^ "Dolomite". webmineral. Archived from the original on 2005-08-27. Retrieved 12 March 2024.
- ^ "Dolomite". mindat.org. Archived from the original on 2015-11-18. Retrieved 12 March 2024.. Mindat.org. Retrieved on 2011-10-10.
- ^ Krauskopf, Konrad Bates; Bird, Dennis K. (1995). Introduction to geochemistry (3rd ed.). New York: McGraw-Hill. ISBN 9780070358201. Archived from the original on 2017-02-26.