Citation: Leclaire, A; Chahboun, H; Groult, D; Raveau, B (1988). Concerning the Intersecting Tunnel Structure of a Novel Vanadyldiphosphate K~2~ (V O~3~) (P~2~ O~7~)~2~ and Its Structural Relationships with Other V(V) and V(IV) Phosphates and Relatives. Journal of Solid State Chemistry, 77, pp. 170-179.