Citation: Licheron, M; Gervais, F; Coutures, J; Choisnet, J (1990). "Ba~2~BiO~4~" surprisingly found as a cubic double perovskite Ba~2~(Ba~2/3~Bi~1/3~)BiO~6-d~. Solid State Communications, 75, pp. 759-763.
Formula: Ba2.667 Bi1.333 O5.67
Chemical name:Barium bismuth bismuth(V) oxide (2.67/0.33/1/5.67)