# Effect of Cation Valence on Thermal Expansion of $MTi_2P_3O_{12}$ $(M=Na, Ca_{0.5}, and \hspace{2mm} La_{0.33})$ Compounds

Senbhagaraman, S and Umarji, AM (1990) Effect of Cation Valence on Thermal Expansion of $MTi_2P_3O_{12}$ $(M=Na, Ca_{0.5}, and \hspace{2mm} La_{0.33})$ Compounds. In: Journal of Solid State Chemistry, 85 (1). pp. 169-172.

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Official URL: http://dx.doi.org/10.1016/S0022-4596(05)80073-8

## Abstract

The thermal expansion behavior of $MTi_2P_3O_{12}$ compounds with $M = Na^+, Cd_{0.5}^{2+}, and La_{0.33}^{3+}$ has been studied by high temperature X-ray diffraction. The difference in the anisotropic axial thermal expansion coefficients drastically varies for cations with varying charges but with similar sizes. The thermal expansion in this family of compounds seems to be essentially due to $M-O$ bond expansion. A new compound $La_{0.33}Ti_2P_3O_{12}$ with hexagonal structure $(a = 8.295$\AA and $c = 22.426$\AA) is reported.

Item Type: Journal Article Copyright of this article belongs to Elsevier Science. Division of Chemical Sciences > Materials Research Centre 12 Jul 2007 25 Jan 2012 09:11 http://eprints.iisc.ernet.in/id/eprint/11533