Crystal growth, crystal structure, and magnetic properties of a new lithium cobalt diphosphate
Single crystals of the new lithium cobalt diphosphate Li{sub 6}Co{sub 5}(P{sub 2}O{sub 7}){sub 4} have been grown, and their structure has been determined by X-ray diffraction techniques. This compound crystallizes in the triclinic space group P1 with a = 6.3009(7), b = 8.413(1), and c = 9.937(1) {angstrom}{alpha} = 107.894(2), {beta} = 90.247(2), and {gamma} = 92.782(2){degree}, V = 500.6(1) {angstrom}{sup 3}, and Z = 1. The structure of Li{sub 6}Co{sub 5}(P{sub 2}O{sub 7}){sub 4} is characterized by the arrangement of CoO{sub 6} octahedra, CoO{sub 5} trigonal bipyramids, and diphosphate groups. The CoO{sub 6} octahedra share edges forming infinite zigzag chains [Co{sub 3}O{sub 14}] running along the b direction. Laterally, such chains share octahedra corners with CoO{sub 5} trigonal bipyramids and P{sub 2}O{sub 7} diphosphate groups connecting with another symmetrically equivalent chain. The connection between these polyhedra defines tunnels along the [100], [001], and [011] directions, where the Li cations are located. The tunnel intersection gives rise to a three-dimensional channel system. Magnetic measurements reveal the presence of antiferromagnetic interactions in the Co{sup 2+} sublattice at about 11 K. The field dependence of magnetization shows that this compound exhibits a metamagnetic transition.
- Research Organization:
- CSIC, Madrid (ES)
- OSTI ID:
- 20050860
- Journal Information:
- Chemistry of Materials, Vol. 12, Issue 3; Other Information: PBD: Mar 2000; ISSN 0897-4756
- Country of Publication:
- United States
- Language:
- English
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