Dolomite

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Dolomite
Dolomite-Magnésite- Navarre.jpg
Dolomite and magnesite – Spain
General
Category Carbonate mineral
Formula
(repeating unit)
(CaMg)(CO3)2
Strunz classification 05.AB.10
Crystal symmetry Trigonal rhombohedral, 3
Unit cell a = 4.8012(1) Å, c = 16.002 Å; Z = 3
Identification
Color White, gray tae pink
Crystal habit Tabular crystals, eften wi curved faces, an aa columnar, stalactitic, granular, massive.
Crystal seestem Trigonal
Twinnin Common as simple contact twins
Cleavage Perfect on {1011}, rhombohedral cleavage
Fractur Conchoidal
Tenacity Brittle
Mohs scale hairdness 3.5 tae 4
Luster Vitreous tae 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
Ither characteristics Mey fluoresce white tae pink unner UV; triboluminescent.
References [1][2][3][4]

Dolomite /ˈdɒləmt/ is a carbonate mineral componed o calcium magnesium carbonate CaMg(CO3)2. The wird dolomite is an aa uised tae describe the sedimentary carbonate rock, which is componed predominantly o the mineral dolomite (itherwise kent as dolostone).

References[eedit | eedit soorce]

  1. 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.
  2. Dolomite. Handbook of Mineralogy. (PDF) . Retrieved on 2011-10-10.
  3. Dolomite. Webmineral. Retrieved on 2011-10-10.
  4. Dolomite. Mindat.org. Retrieved on 2011-10-10.