Disodium calcium dinickel(II) bis[diphosphate(V)] decahydrate

Disodium calcium dinickel(II) bis[diphosphate(V)] decahydrate

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In the title compound, Na2CaNi2(P2O7)2(H2O)10, there are two distinct P-atom sites, each tetrahedrally coordinated click here by four O atoms.The resulting phosphate tetrahedra link through a common O atom, forming a [P2O7]4− diphosphate unit.The Ni—O coordination is square pyramidal with four O atoms from two diphosphate groups in equatorial positions and the vertex occupied by a water O atom.The (P2O7)(H2O) units link the Ni atoms, forming a chain of pyramids biomat for sale and tetrahedra.As a result of the d-glide and twofold-axis symmetry of space group Fdd2, the chains propagate along [101] and [10overline{1}], and chains in adjacent layers are mutually orthogonal.

The Ca cation, located on a rotation axis, and the Na cation are each octahedrally coordinated by four O atoms and two waters.The Ni-chain arrangement is stabilized by Ca and Na coordination and a network of O—H.O hydrogen bonds.