Nioboaeschynite-(Ce) Aleksandrov V B Doklady Akademii Nauk SSSR 142 (1962) 181-184 The crystal structure of aeschynite Locality: Vishnevye Mts, Chelyabinsk Oblast, Southern Urals, Russia _database_code_amcsd 0012439 5.37 11.08 7.56 90 90 90 Pbnm atom x y z occ Ce .042 .458 .25 .68 Ca .042 .458 .25 .17 Fe .042 .458 .25 .06 Mn .042 .458 .25 .02 Th .042 .458 .25 .01 Nb .040 .144 .008 .505 Ti .040 .144 .008 .495 O1 .378 .210 .567 O2 .264 .477 .538 O3 .167 .105 .25 O4 .375 .355 .25