A novel modification of manganese orthophosphate Mn 3(PO 4) 2
Abstract
A new third modification of manganese(II) orthophosphate Mn 3(PO 4) 2 has been obtained under hydrothermal conditions. Its crystal structure was determined by single crystal X-ray diffraction: space group P2/n, Z=2, a=5.2344(5), b=6.6739(7), c=8.9688(10) Å, β=95.276(9)° at 293 K, wR=0.050, R=0.019. In the structure, [MnO 5] polyhedra and [MnO 6] octahedra in a ratio of 2 :1 share common edges to form chains alternating along the [110] and [ 1¯10] directions. They are further linked by common vertices and the phosphate tetrahedra to a 3D framework. The relations of this new structure type to the other polymorphs of Mn 3(PO 4) 2 and related Mn and Fe phosphates are discussed.
- Publication:
-
Solid State Sciences
- Pub Date:
- August 2005
- DOI:
- 10.1016/j.solidstatesciences.2005.03.005
- Bibcode:
- 2005SSSci...7..950M