NaMgF3 Martin C D, Crichton W A, Liu H, Prakapenka V, Chen J, Parise J B American Mineralogist 91 (2006) 1703-1706 Rietveld structure refinement of perovskite and post-perovskite phases of NaMgF3 (neighborite) at high pressures Locality: synthetic Sample: (d), P = 54 GPa _database_code_amcsd 0004242 2.7143 8.393 6.846 90 90 90 Cmc2_1 atom x y z Na 0 .2531 .0036 Mg 0 .0129 .2556 F1 0 .9251 0 F2 0 .6286 .1551 F3 0 .6554 .7902