A Chemical-Pressure-Induced Phase Transition Controlled by Lone Electron Pair Activity.

ABSTRACT: The chemical pressure approach offers a new paradigm for property control in functional materials. In this work, we disclose a correlation between the β → α pressure-induced phase transition in SnMoO₄ and the substitution process of Mo⁶⁺ by W⁶⁺ in SnMo_1-xW_xO₄ solid solutions (x = 0-1). Special attention is paid to discriminating the role of the lone pair Sn²⁺ cation from the structural distortive effect along the Mo/W substitution process, which is crucial to disentangle the driven force of the transition phase. Furthermore, the reverse α → β transition observed at high temperature in SnWO₄ is rationalized on the same basis as a negative pressure effect associated with a decreasing

SUBMITTER: Gomes EO 

PROVIDER: S-EPMC9619963 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature