The electron microscopic observation of phase transitions in KFeF4, RbFeF4, and RbVF4

Rudy A.C. Deblieck; J. van Landuyt; S. Amelinckx

doi:10.1016/0022-4596(85)90306-8

The electron microscopic observation of phase transitions in KFeF₄, RbFeF₄, and RbVF₄

Rudy A.C. Deblieck, J. van Landuyt, S. Amelinckx

Research output › peer-review

Abstract

Electron diffraction experiments reveal a novel phase transition in RbFeF₄ and confirm the existence of phase transitions at 368 K in KFeF₄, at 378 K in RbFeF₄, and at 413 K in RbVF₄. At variance with other studies it is found that the periodicity along the c axis is doubled in the room temperature phase of RbFeF₄ and there is no indication for the disappearance of this doubling at 413 K in RbVF₄. A proposal for the structural characteristics of the phases involved in this transition is made, using the complete list of possible structures obtained when only tilting of rigid octahedra is allowed. Some attention is also paid to decomposition phenomena under electron irradiation.

Original language	English
Pages (from-to)	379-387
Number of pages	9
Journal	Journal of Solid State Chemistry
Volume	59
Issue number	3
DOIs	https://doi.org/10.1016/0022-4596(85)90306-8
State	Published - Oct 1985

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1016/0022-4596(85)90306-8

Cite this

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title = "The electron microscopic observation of phase transitions in KFeF4, RbFeF4, and RbVF4",

abstract = "Electron diffraction experiments reveal a novel phase transition in RbFeF4 and confirm the existence of phase transitions at 368 K in KFeF4, at 378 K in RbFeF4, and at 413 K in RbVF4. At variance with other studies it is found that the periodicity along the c axis is doubled in the room temperature phase of RbFeF4 and there is no indication for the disappearance of this doubling at 413 K in RbVF4. A proposal for the structural characteristics of the phases involved in this transition is made, using the complete list of possible structures obtained when only tilting of rigid octahedra is allowed. Some attention is also paid to decomposition phenomena under electron irradiation.",

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T1 - The electron microscopic observation of phase transitions in KFeF4, RbFeF4, and RbVF4

AU - Deblieck, Rudy A.C.

AU - van Landuyt, J.

AU - Amelinckx, S.

PY - 1985/10

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AB - Electron diffraction experiments reveal a novel phase transition in RbFeF4 and confirm the existence of phase transitions at 368 K in KFeF4, at 378 K in RbFeF4, and at 413 K in RbVF4. At variance with other studies it is found that the periodicity along the c axis is doubled in the room temperature phase of RbFeF4 and there is no indication for the disappearance of this doubling at 413 K in RbVF4. A proposal for the structural characteristics of the phases involved in this transition is made, using the complete list of possible structures obtained when only tilting of rigid octahedra is allowed. Some attention is also paid to decomposition phenomena under electron irradiation.

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