Fluornatromicrolite Andrade M B, Atencio D, Menezes L A D, Ellena J The Canadian Mineralogist 49 (2011) 615-621 The crystal structure of a microlite-group mineral with a formula near NaCaTa2O6F from the Morro Redondo mine, Coronel Murta, Minas Gerias, Brazil Locality: Morro Redondo mine, Coronel Murta, Minas Gerias, Brazil _database_code_amcsd 0018462 10.4396 10.4396 10.4396 90 90 90 *Fd3m .125 .125 .125 atom x y z occ Uiso NaA .5 .5 .5 .44 .0181 CaA .5 .5 .5 .44 .0181 PbA .5 .5 .5 .01 .0181 TaB 0 0 0 .85 .0126 NbB 0 0 0 .07 .0126 SiB 0 0 0 .06 .0126 AsB 0 0 0 .02 .0126 O1 .0684 .375 .375 .96 .0207 OH1 .0684 .375 .375 .04 .0207 F .375 .375 .375 .73 .013