University of Colorado

Mineral Structure and Property Data

Dolomite Group


The dolomite group is composed of the rhombohedral carbonates dolomite (CaMg(CO3)2) and ankerite (CaFe(CO3)2).

The crystal structure of dolomite.


                
                Dolomite    Ankerite
                (CaMg(CO3)2)  (CaFe(CO3)2). 

Form.Wt. Z 3 3 CrystalSystem Trig Trig PointGroup -3 -3 SpaceGroup R-3 R-3 UnitCell a(Å) 4.8069 4.830 c(Å) 16.0034 16.167 Vol(Å3) 320.24 326.63 MolarVol 64.293 65.576 Density 2.868 3.293 Thermal Expansion(Volumetric) alpha 22.8 a0 0.11928 a1 3.1703 a2 -0.5393 Elastic Parameters Ks(GPa) 94.9 G(GPa) 45.7

Mineral Data Base Index

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