Citation: Laligant, Y; Le Bail, A; Ferey, G; Hervieu, M; Raveau, B; Wilkinson, A; Cheetham, A K (1988). Synthesis and ab-initio structure determination from X-ray powder data of Ba~2~ Pd O~3~ with sevenfold coordinated Ba^2+^. Structural correlations with K~2~ Ni F~4~ and Ba~2~ Ni F~6~. European Journal of Solid State Inorganic Chemistry, 25, pp. 237-246.