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High‐temperature monoclinic α‐SrHfF 6 , and isostructural α‐SrZrF 6 : associating Hf 2 F 12 bipolyhedra and SrF 8 snub disphenoids
Author(s) -
Laval Jean-Paul,
Mayet Richard
Publication year - 2018
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229618001110
Subject(s) - isostructural , monoclinic crystal system , strontium , crystallography , hafnium , materials science , zirconium , crystal structure , chemistry , inorganic chemistry , organic chemistry
The structure of the high‐temperature monoclinic variety α‐SrHfF 6 (strontium hafnium hexafluoride) [and of isostructural α‐SrZrF 6 (strontium zirconium hexafluoride)] associates Hf 2 F 12 bipolyhedra and SrF 8 snub disphenoids, forming zigzag twisted [SrF 6 ] n layers. The distribution of the Hf and Sr polyhedra forms a three‐dimensional framework which can be related to the family of anion‐excess ReO 3 ‐related superstructures. α‐SrHfF 6 corresponds to a new ABX 6 type and is compared to the other main families already described. A partial amorphization of this structure is observed in samples quenched from the melt.