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 = 200 C _database_code_amcsd 0003925 5.3047 5.4282 7.5864 90 90 90 Pbnm atom x y z Uiso Na .9856 .0455 .25 .036 Mg 0 .5 0 .014 F1 .0870 .4669 .25 .018 F2 .6951 .2956 .0481 .033