M. Bettach et al., A MIXED ZINC-NICKEL CYCLO-TETRAPHOSPHATE, ZNNIP4O12, Acta crystallographica. Section C, Crystal structure communications, 54, 1998, pp. 1209-1211
Zinc nickel cyclo-tetraphosphate is composed of cyclic [P4O12] groups
forming sheets parallel to the crystallographic (100) plane. These she
ets are separated by zigzag chains of alternating NiO6 or ZnO6 octahed
ra that share a common edge, the cations being statistically disordere
d. The chains are extended along the c axis and link two consecutive s
heets, thus ensuring the cohesion of the structure.