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 = 24 kbar
_database_code_amcsd 0000515
4.193 4.193 4.193 90 90 90 Fm3m
atom  x  y  z Biso
Mg    0  0  0   .4
O    .5 .5 .5   .7