Citation: Choisnet, J.; Nguyen, N.; Groult, D.; Raveau, B. (1976). De nouveaux oxydes a reseau forme d'octahedres NbO6 (TaO6) et de groupes Si2O7: Les phases A3Ta6Si4O26 (A = Ba,Sr) et K6M6Si4O26 (M = Nb,Ta) Locality: synthetic. Materials Research Bulletin, 11, pp. 887-894.