Citation: Lightfoot, P.; Jorgensen, J.D.; Woodcock, D.A.; Short, S. (1999). Low thermal expansion materials: a comparison of the structural behaviour of La0.33 Ti2 (P O4)3, Sr0.5 Ti2 (P O4)3 and Na Ti2 (P O4)3. International Journal of Inorganic Materials, 1, pp. 53-60.