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Synthesis and crystal structure of a novel lithium bismuth phosphate, $Li_2Bi_{14.67}(PO_4)_6O_{14}$

Muktha, B and Darriet, J and Row, Guru TN (2008) Synthesis and crystal structure of a novel lithium bismuth phosphate, $Li_2Bi_{14.67}(PO_4)_6O_{14}$. In: Materials Research Bulletin, 43 (11). pp. 3017-3025.

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A lithium bismuth phosphate, $Li_2Bi_{14.67}(PO_4)_6O_{14}$, 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. $Li_2Bi_{14.67}(PO_4)_6O_{14}$ crystallizes in the monoclinic system C2/c (No.15), with a = 30.8189(4) angstrom, b = 5.2691(3) angstrom, c = 24.5302(3) angstrom, \beta = 122.84(2)degrees, V = 3346.81 (1) angstrom(3) and Z = 2. The structure along the b axis consists of layers of [Bi2O2] units as the basic building block. These are separated by isolated $PO_4$ and $LiO_4$ tetrahedra. The oxygen co-ordination around two of the phosphorus atoms is disordered. Solid-state $^7Li$ NMR studies confirm the presence of lithium in the structure. The material shows ionic conductivity of the order of $10^{-5} S cm^{-1}$ at 600 $^oC$.

Item Type: Journal Article
Publication: Materials Research Bulletin
Publisher: Elsevier Science
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Crystal structure;Ionic conductivity.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 15 May 2009 06:39
Last Modified: 19 Sep 2010 04:53
URI: http://eprints.iisc.ac.in/id/eprint/16756

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