Citation: Groult, D; Michel, C; Raveau, B (1974). Sur l'evolution thermique des pyrochlores d'hydroxonium et d'ammonium H~3~ O M W O~6~, H~4~ O M~2~ O~6~ et N H~4~ M W O~6~ (M = Nb, Ta). Journal of Inorganic and Nuclear Chemistry, 36, pp. 61-66.
Formula: H1.5 O6.25 Ta W
Chemical name:TANTALUM TUNGSTEN OXIDE HYDRATE (1/1/5.5/.8)