#148
R-3
Example – Dolomite, CaMg(CO3)2
Named after the French mineralogist and geologist, Deodat Guy Tancrede Gratet de Dolomieu (1750-1801).
Refinement of the crystal structure of Dolomite
Steinfink H, Sans F J
American Mineralogist 44 (1959) 679-682
http://webmineral.com/data/Dolomite.shtml
CIF
http://rruff.geo.arizona.edu/AMS/download.php?id=00158.cif&down=cif
CaO6 octahedra (blue)
MgO6 octahedra (orange)
C (black)
O (red)
The Fascination of Crystals and Symmetry 