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Dolomite /ˈdɒləmt/ 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-Magnésite- Navarre.jpg
Dolomite and magnesite – Spain
General
CategoryCarbonate mineral
Formula
(repeatin unit)
(CaMg)(CO3)2
Strunz clessification05.AB.10
Creestal seestemTrigonal
Space groupTrigonal rhombohedral, 3
Unit cella = 4.8012(1) Å, c = 16.002 Å; Z = 3
Identification
ColourWhite, gray tae pink
Creestal habitTabular crystals, aften wi curved faces, columnar, stalactitic, granular, massive.
TwinninCommon as simple contact twins
CleavagePerfect on {1011}, rhombohedral cleavage
FracturConchoidal
TenacityBrickle
Mohs scale haurdness3.5 tae 4
SkinkleVitreous tae pearly
StreakWhite
Speceefic gravity2.84–2.86
Optical propertiesUniaxial (-)
Refractive indexnω = 1.679–1.681 nε = 1.500
Birefringenceδ = 0.179–0.181
SolubilityPoorly soluble in dilute HCl
Ither chairacteristicsMey fluoresce white tae pink unner UV; triboluminescent.
References[1][2][3][4]

ReferencesEedit

  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.