Structure-conductivity relationship of PrBaMnMoO6-δ through in-situ measurements: A neutron diffraction study

The structural and electrochemical properties of the double perovskite-type oxide, PrBaMnMoO6-delta, was in-vestigated using neutron diffraction with in-situ conductivity measurement under a dry Argon atmosphere from 25 degrees C to 700 degrees C. A Rietveld refinement of the neutron diffraction data confirmed monoclinic symmetry in the P2(1)/n space group. Rietveld refinement also confirms the unit cell parameters of a = 5.6567 (1) angstrom, b = 5.6065 (2) angstrom, c = 7.9344 (1) angstrom and beta = 84.43 degrees with reliable atomic positions and refinement factors (R-factors). Neutron diffraction data refinement shows two minor phases (< 5%), an orthorhombic AB(2)O(5) type phase of PrMn2O5 in the Pbam (No. 32) space group with unit cell parameters, a = 7.9672 (1) angstrom, b = 8.9043 (2) angstrom and c = 5.8540 (1) angstrom and a scheelite phase of BaMoO4 in the tetragonal I4(1)/a (88) space group with the unit cell parameters, a = b = 5.9522 (1) angstrom, and c = 12.3211 (2) angstrom. Morphological images revealed a porous and intertwined microstructure. In-situ conductivity measurement shows that the total conductivity of this material was 130.84 Scm(-1) at 700 degrees C.

Automated summary

The study investigated the structural and electrochemical properties of the double perovskite-type oxide PrBaMnMoO6-delta using neutron diffraction and in-situ conductivity measurement. Results revealed a monoclinic crystal structure with minor phases present. Morphological images showed a porous and intertwined microstructure.