The influence of Zn${}^{2+}$ ions on the local structure and thermochromic properties of Cu${}_{1-x}$Zn${}_x$MoO${}_4$ solid solutions

Abstract

The influence of zinc ions on the thermochromic properties of polycrystalline Cu${}_{1-x}$Zn${}_x$MoO${}_4$ ($x$=0.10, 0.50, 0.90) solid solutions was studied by X-ray absorption spectroscopy at the Cu, Zn and Mo K-edges. Detailed structural information on the local environment of metal ions was obtained from the simultaneous analysis of EXAFS spectra measured at three metal absorption edges using the reverse Monte Carlo method. Thermochromic phase transition with the hysteretic behaviour between $\alpha$ and $\gamma$ phases was observed in Cu${}_{0.90}$Zn${}_{0.10}$MoO${}_4$ solid solution. It was found that the local environment of molybdenum ions is most susceptible to the substitution of copper for zinc and, upon cooling, transforms from tetrahedral MoO${}_4$ to distorted octahedral MoO${}_6$.

References in corpus (1)

• Study of the thermochromic phase transition in CuMo${}_{1-x}$W${}_x$O${}_4$ solid solutions at the W L${}_3$-edge by resonant X-ray emission spectroscopy

Cited by in corpus (2)

• In situ study of zinc peroxide decomposition to zinc oxide by X-ray absorption spectroscopy and reverse Monte-Carlo simulations
• Revealing the local structure of CuMo${}_{1-x}$W${}_x$O${}_4$ solid solutions by multi-edge X-ray absorption spectroscopy