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Title: Zero Thermal Expansion and Abrupt Amorphization on Compression in Anion Excess ReO3-Type Cubic YbZrF7

Journal Article · · Chemistry of Materials
 [1];  [1];  [1];  [2];  [2]; ORCiD logo [3]
  1. Georgia Inst. of Technology, Atlanta, GA (United States). School of Chemistry and Biochemistry
  2. Argonne National Lab. (ANL), Argonne, IL (United States). X-ray Science Division. Advanced Photon Source
  3. Georgia Inst. of Technology, Atlanta, GA (United States). School of Chemistry and Biochemistry. School of Materials Science and Engineering

In this paper, heat treatment of cubic YbZrF7, after quenching from 1000 °C, leads to a material displaying precisely zero thermal expansion at ~300 K and negative thermal expansion at lower temperatures. The zero thermal expansion is associated with a minimum in the lattice constant at ~300 K. X-ray total scattering measurements are consistent with a previously proposed model in which the incorporation of interstitial fluoride into the ReO3-related structure leads to both edge and corner sharing coordination polyhedra. The temperature dependence of the experimental pair correlation functions suggests that the expansions of edge and corner sharing links partly compensate for one another, supporting the hypothesis that the deliberate incorporation of excess fluoride into ReO3 structure materials can be used as a design strategy for controlling thermal expansion. Cubic YbZrF7 has a bulk modulus, K0, of 55.4(7) GPa and displays pronounced pressure-induced softening [K0' = -27.7(6)] prior to an abrupt amorphization on compression above 0.95 GPa. Finally, the resulting glass shows a single sharp scattering maximum at Q ~ 1.6 Å–1.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Georgia Institute of Technology, Atlanta, GA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Foundation (NSF)
Grant/Contract Number:
AC02-06CH11357; DMR-1607316
OSTI ID:
1467068
Journal Information:
Chemistry of Materials, Vol. 30, Issue 9; ISSN 0897-4756
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 17 works
Citation information provided by
Web of Science

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Polymorphism in M(H 2 PO 2 ) 3 (M = V, Al, Ga) compounds with the perovskite-related ReO 3 structure journal January 2019
Perovskite-related ReO3-type structures journal January 2020
Uniaxial thermal expansion behaviors and ionic conduction in a layered (NH 4 ) 2 V 3 O 8 journal January 2020
Inorganic–organic hybridization induced uniaxial zero thermal expansion in MC 4 O 4 (M = Ba, Pb) journal January 2019