Citation: Tordjman, I; Guitel, J C; Durif, A; Averbuch, M T; Masse, R (1978). Structure cristalline du monophosphate Ag Co P O~4~100521-Syntheses of Hollandite type Rb~2~ Cr~8~ O~16~, K~2~ Cr~2~ V~6~ O~16~ and K~2~ V~8~ O~16~. Materials Research Bulletin, 13, pp. 983-988.