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Possible incommensurate phase in KFeF4
Published/Copyright:
August 25, 2010
Abstract
We analyse in the framework of the Landau theory of second order phase transitions the continuous structural transformation arising in KFeF4 at 368°K. We note that in this case, the thermodynamic potential expansion against the order parameter contains a Lifchitz invariant, so that an incommensurate phase can be expected in this compound. It would arise between the phases of D2h17 and D2h13 symmetry, with a modulation wave vector directed along the crystallographic b axis.
Published Online: 2010-8-25
Published in Print: 1983-1-1
© 2015 Oldenbourg Wissenschaftsverlag GmbH, Rosenheimer Str. 145, 81671 München
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- Solid-state reactions in “salt X”
- Grandite garnet structures in connection with the growth mechanism
- The crystal structure and electron density of tetraphenyl-silicon, (C6H5)4Si
- Effects of symmetry and atomic heterogeneity on X-ray intensities – a case of hypercentric distribution*
- Refinement of a partially disordered natrolite, Na2Al2Si3O10 · 2H2O
- The crystal structures of 1-(3′,5′-dinitrobenzoyloxy)-bicyclo[3.3.1]-9-oxanonane and 5-(3′,5′-dinitrobenzoyloxy)-cyclooctanone1
- The crystal structure of methoxymethoxy-2,4-dinitrobenzene1
- The crystal structure of 2-(3′,5′-dinitrobenzoyloxy)-tetrahydropyran Cyclohexane Solvate1
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