L. Jian et Cm. Wayman, MONOCLINIC-TO-TETRAGONAL PHASE-TRANSFORMATION IN A CERAMIC RARE-EARTHORTHONIOBATE, LANBO4, Journal of the American Ceramic Society, 80(3), 1997, pp. 803-806
The monoclinic-to-tetragonal phase transformation in LaNbO4 has been i
nvestigated by X-ray diffraction and dilatometry, Based on the experim
ental results and theoretical concerns (Landau theory and thermodynami
cs), it is suggested that this transformation is second order in natur
e.