Synthesis and crystal structure of a novel lithium bismuth phosphate, Li{sub 2}Bi{sub 14.67}(PO{sub 4}){sub 6}O{sub 14}

A lithium bismuth phosphate, Li{sub 2}Bi{sub 14.67}(PO{sub 4}){sub 6}O{sub 14}, has been synthesized for the first time by the solid-state method. The crystal structure was determined by single crystal X-ray diffraction at 150 K. Li{sub 2}Bi{sub 14.67}(PO{sub 4}){sub 6}O{sub 14} crystallizes in the...

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Bibliographic Details
Published in:Materials research bulletin 2008-11, Vol.43 (11)
Main Authors: Muktha, B., Darriet, J., Guru Row, T.N.
Format: Article
Language:English
Subjects:
BISMUTH PHOSPHATES
IONIC CONDUCTIVITY
LAYERS
LITHIUM COMPOUNDS
MATERIALS SCIENCE
MONOCLINIC LATTICES
MONOCRYSTALS
NUCLEAR MAGNETIC RESONANCE
OXYGEN
PHOSPHORUS
SYNTHESIS
X-RAY DIFFRACTION
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Summary:A lithium bismuth phosphate, Li{sub 2}Bi{sub 14.67}(PO{sub 4}){sub 6}O{sub 14}, has been synthesized for the first time by the solid-state method. The crystal structure was determined by single crystal X-ray diffraction at 150 K. Li{sub 2}Bi{sub 14.67}(PO{sub 4}){sub 6}O{sub 14} crystallizes in the monoclinic system C2/c (No. 15), with a = 30.8189(4) A, b = 5.2691(3) A, c = 24.5302(3) A, {beta} 122.84(2){sup o}, V = 3346.81(1) A{sup 3} and Z = 2. The structure along the b axis consists of layers of [Bi{sub 2}O{sub 2}] units as the basic building block. These are separated by isolated PO{sub 4} and LiO{sub 4} tetrahedra. The oxygen co-ordination around two of the phosphorus atoms is disordered. Solid-state {sup 7}Li NMR studies confirm the presence of lithium in the structure. The material shows ionic conductivity of the order of 10{sup -5} S cm{sup -1} at 600 deg. C.
ISSN:0025-5408
1873-4227
DOI:10.1016/j.materresbull.2007.11.024