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 = 25 C _database_code_amcsd 0003924 5.2768 5.4213 7.5548 90 90 90 Pbnm atom x y z Uiso Na .9877 .0493 .25 .035 Mg 0 .5 0 .015 F1 .0892 .4677 .25 .027 F2 .6963 .2968 .0546 .029