Neighborite Mitchell R H, Alexander M, Cranswick L M D, Swainson I P Physics and Chemistry of Minerals 34 (2007) 705-712 A powder neutron diffraction study of the crystal structure of the fluoroperovskite NaMgF3 (neighborite) from 300 to 3.6 K Locality: synthetic Sample: T = 250 K _database_code_amcsd 0009115 5.3535 5.4858 7.6596 90 90 90 Pbnm atom x y z Na .9917 .0436 .25 Mg 0 .5 0 F1 .0888 .4720 .25 F2 .7025 .2955 .0469