Fluorite
Wyckoff R W G
Crystal Structures 1 (1963) 239-444
Second edition. Interscience Publishers, New York, New York
Fluorite structure
_database_code_amcsd 0011683
5.46295 5.46295 5.46295 90 90 90 Fm3m
atom   x   y   z
Ca     0   0   0
F    .25 .25 .25