Periclase
Hazen R M
American Mineralogist 61 (1976) 266-271
Effects of temperature and pressure on the cell dimension and X-ray temperature
factors of periclase
T = 23 C, P = 17 kbar
_database_code_amcsd 0000514
4.198 4.198 4.198 90 90 90 Fm3m
atom  x  y  z Biso
Mg    0  0  0   .3
O    .5 .5 .5   .5