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Structural phase transitions in RbFeF4: I. Powder and single crystal x-ray diffraction study of the room temperature phase

AutorMorón, M. Carmen; Bulou, A.; Piqué, C.; Fourquet, J. L.
Fecha de publicación1990
EditorInstitute of Physics Publishing
CitaciónJournal of Physics: Condensed Matter 2(42): 8269-8275 (1990)
ResumenA re-investigation of the room temperature phase of RbFeF4 by single crystal and powder X-ray diffraction is presented. Using a Rietveld method for refinements, the space group is shown to be orthorhombic D2h11-Pmab instead of D23-P21212 as proposed in the most recent work. As a result, the space group of the room temperature phase (phase IV) is not a subgroup of the space groups of the high temperature phases III (D2h13-Pmmn) and II (D4h5-P4/mbm). However, it obviously remains a subgroup of the highest temperature phase I (D4h4-P4/mmm). A discondensation is deduced.
URIhttp://hdl.handle.net/10261/128698
Identificadoresissn: 0953-8984
e-issn: 1361-648X
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