Dicobalt(II) lead(II) hydrogenphos-phate(V) phos-phate(V) hydroxide monohydrate.

Abderrazzak Assani,Lahcen El Ammari,Mohamed Saadi,Mohammed Zriouil

doi:10.1107/s1600536812014870

Abderrazzak Assani, Lahcen El Ammari + Show 2 more

Open Access

https://doi.org/10.1107/s1600536812014870

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Abstract

The title compound, Co2Pb(HPO4)(PO4)OH·H2O, which was synthesized under hydrothermal conditions, crystallizes in a new structure type. Except for two O atoms in general positions and two Co atoms on centres of symmetry, all other atoms in the asymmetric unit (1 Pb, 2 Co, 2 P, 8 O and 4 H) are located on mirror planes. The structure is built up from two infinite linear chains, viz. 1 ∞[CoO2/1(H2O)2/2O2/2] and 1 ∞[CoO2/1(OH)2/2O2/2], of edge-sharing CoO6 octahedra running along [010]. Adjacent chains are linked to each other through PO4 and PO3(OH) tetrahedra, leading to the formation of layers parallel to (100). The three-dimensional framework is formed by stacking along [100] of adjacent layers that are held together by distorted PbO8 polyhedra. Hydrogen bonds of the type O—H⋯O involving the water molecule are very strong, while those O atoms involving the OH groups form weak bifurcated and trifurcated hydrogen bonds.

Highlights

The title compound, Co2Pb(HPO4)(PO4)OHH2O, which was synthesized under hydrothermal conditions, crystallizes in a new structure type
Symmetry codes: (ii) −x, −y, −z; (iii) x, −y+1/2, z; (iv) −x, −y, −z+1; (xiv) −x, y−1/2, −z; (xv) x−1, y, z

Summary

Structure Reports

Symmetry codes: (i) x; y; z; (ii) x; y 12; z; (iii) x; y; z þ 1; (iv) x; y þ 12; z;. Except for two O atoms in general positions and two Co atoms on centres of symmetry, all other atoms in the asymmetric unit The structure is built up from two infinite linear chains, viz. Adjacent chains are linked to each other through PO4 and PO3(OH) tetrahedra, leading to the formation of layers parallel to (100). The three-dimensional framework is formed by stacking along [100] of adjacent layers that are held together by distorted PbO8 polyhedra. Hydrogen bonds of the type O—H O involving the water molecule are very strong, while those O atoms involving the OH groups form weak bifurcated and trifurcated hydrogen bonds

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