Crystal Structure of Calciumpolyphosphate, [Ca₂(PO₃)₄]_x

Abstract

Abstract β‐Calciumpolyphosphate crystallizes in the monoclinic space group P2 1 /c, unit cell a = 6.999, b = 7.717, c = 16.944 Å, β = 90.44°. Full matrix refinement with unit weight lead to R = 0.022. The period of the anion chain amounts to 4 tetrahedra, chain direction is x. The cation polyhedra form double chains, also parallel x, in which the polyhedra are linked by common faces and edges.