6533b854fe1ef96bd12afcaf

RESEARCH PRODUCT

Phase transition in NaSn2(PO4)3 and thermal expansion of NaMIV2 (PO43; MIV = Ti, Sn, Zr

J.l. RodrigoJ. Alamo

subject

DiffractionPhase transitionChemistryMechanical EngineeringInorganic chemistryThermodynamicsTrigonal crystal systemCondensed Matter PhysicsThermal expansionTransition pointMechanics of MaterialsLattice (order)General Materials ScienceIsostructural

description

Abstract NaSn2(PO4)3 presents a fast and reversible second order phase transition about 575°C. Both phases above and below the transition point are rhombohedral. The high temperature phase is isostructural with NaTi2(PO4)3 and NaZr2(PO4)3, NZP structure. The lattice thermal expansion of these three compounds has been determined from x-ray diffraction data at different temperatures ranging from room temperature up to 1000°C. Differences in behaviour are discussed in relation to the structure.

https://doi.org/10.1016/0025-5408(91)90187-q