Low temperature structural phase transition in the Ba2CaMoO6 perovskite

  title={Low temperature structural phase transition in the Ba2CaMoO6 perovskite},
  author={Loi T. Nguyen and Robert J. Cava and Allyson M. Fry-Petit},
  journal={Journal of Solid State Chemistry},
Abstract Ba 2 CaMoO 6 was synthesized by a solid state method. The crystal structure adopts the cubic Fm -3 m space group at room temperature with lattice parameters of 8.3775 (9) A. Upon cooling, Ba 2 CaMoO 6 was determined to have a structural phase transition to tetragonal I 4/ m ( a  = 5.9051 (2) A and c  = 8.3872 (4) A) near 200 K. The phase transition was probed structurally by synchrotron and neutron diffraction and thermodynamically by specific heat and differential scanning calorimetry… 
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