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Ferroelastic domain walls in the incommensurate phase of γ-KCoP04

Published in Ferroelectrics. 1996, vol. 175, no. 1, p. 41-50
Abstract Ferroelastic domains in γ-KCoPO4 were studied by polarized light microscopy and by x-ray methods. These domains appear upon cooling as a result of a phase transition at ∼449° from an orthorhombic normal (N) phase (with probable space group Pnma) to a incommensurate phase (IC) which is monoclinic and has a av. structure isotypic with CsLiSO4 with space group P21/c. The modulation of the monoclinic structure decreases an the cell parameters change when the crystals are ground to a grain size of <7 μm and heated and cooled several times through the phase transition. A Rietveld refinement of the structure of γ-KCoPO4 was achieved on a powder pattern. The cell parameters are: a 5.3052(3), b 8.5571(4), c 10.3926(6) Å, β 120.833(3)°, Z = 4.
Keywords DomainsFerroelasticityIncommensurability
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Project FNS: 1995
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LUJAN PEREZ, Marcos Luis, SCHMID, Hans. Ferroelastic domain walls in the incommensurate phase of γ-KCoP04. In: Ferroelectrics, 1996, vol. 175, n° 1, p. 41-50. https://archive-ouverte.unige.ch/unige:31142

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Deposited on : 2013-11-19

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