Neighborite Chen J, Liu H, Martin C D, Parise J B, Weidner D J American Mineralogist 90 (2005) 1534-1539 Crystal chemistry of NaMgF3 perovskite and high pressure and temperature Sample: P = 4 GPa, T = 800 C _database_code_amcsd 0003929 5.4162 5.4629 7.7092 90 90 90 Pbnm atom x y z Uiso Na .9980 .0242 .25 .064 Mg 0 .5 0 .025 F1 .0607 .4914 .25 .058 F2 .7028 .2884 .0407 .048