Material name Dolomite
Composition (Ca0.871Mg0.129)CO3
Chemical formula weight 98.05
System Trigonal
Temperature (ºC) 24
a (Å), b (Å), c (Å) 4.9382(4) 4.9382(4) 16.832(1) @
α (deg), β (deg), γ (deg) 90 90 120 @
Unit cell volume (Å3) 355.48(7)
Calculated density (g/p3) 2.75
Z 6
Space group R3c (No.167)
atom site g x/a y/b z/c B2)
Ca 6b 0.871 0 0 0 1.42(1)
Mg 6b 0.129 0 0 0 1.42(1)
C 6a 1 0 0 1/4 1.39(3)
O 18e 1 0.2587(3) 0 1/4 2.42(3)

Reference: J. Paquette and R.J. Reeder, American Mineralogist, 75, 1151 (1990).