Inorganic Inorganic High Purity Inorganic Salts High Purity Inorganic Salts 5112 AMMONIUM HEXAFLUORONIOBATE AMMONIUM HEXAFLUORONIOBATE 99.99% (NH4)5[NbF4O][NbF7]2 726.88 12062,13,4 12062134 13,4 1206213,4 12062 13 4 NR This item has the complex formula listed below, It has been determined that the simple NH4NbF6 does not exist, Assay (metals basis) 99.99% min.