#145
P32
Example – Sheldrickite, NaCa3(CO3)2F3 • H2O
Named for George M. Sheldrick, creator of the SHELX software, widely used for the refinement of crystal structures.
Sheldrickite, a new sodium-calcium-fluorocarbonate mineral species from Mont Saint-Hilaire, Quebec
Grice J D, Gault R A, Van Velthuizen J
The Canadian Mineralogist 35 (1997) 181-187
CIF
http://rruff.geo.arizona.edu/AMS/download.php?id=06016.cif&down=cif
Ca (blue)
Na (yellow)
C (black)
O (red)
F (green)
The Fascination of Crystals and Symmetry 