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Mosaicity of spin-crossover crystals

hal.structure.identifierInstitut Laue-Langevin [ILL]
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorLAKHLOUFI, Sabine
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorTAILLEUR, Élodie
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGUO, Wenbin
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorLE GAC, Frédéric
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMARCHIVIE, Mathieu
hal.structure.identifierInstitut Laue-Langevin [ILL]
dc.contributor.authorLEMÉE-CAILLEAU, Marie-Hélène
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCHASTANET, Guillaume
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGUIONNEAU, Philippe
dc.date.issued2018
dc.identifier.issn2073-4352
dc.description.abstractEnReal crystals are composed of a mosaic of domains whose misalignment is evaluated by their level of “mosaicity” using X-ray diffraction. In thermo-induced spin-crossover compounds, the crystal may be seen as a mixture of metal centres, some being in the high-spin (HS) state and others in the low spin (LS) state. Since the volume of HS and LS crystal packings are known to be very different, the assembly of domains within the crystal, i.e., its mosaicity, may be modified at the spin crossover. With little data available in the literature we propose an investigation into the temperature dependence of mosaicity in certain spin-crossover crystals. The study was preceded by the examination of instrumental factors, in order to establish a protocol for the measurement of mosaicity. The results show that crystal mosaicity appears to be strongly modified by thermal spin-crossover; however, the nature of the changes are probably sample dependent and driven, or masked, in most cases by the characteristics of the crystal (disorder, morphology …). No general relationship could be established between mosaicity and crystal properties. If, however, mosaicity studies in spin-crossover crystals are conducted and interpreted with great care, they could help to elucidate crucial crystal characteristics such as mechanical fatigability, and more generally to investigate systems where phase transition is associated with large volume changes.
dc.language.isoen
dc.publisherMDPI
dc.subject.enmosaicity
dc.subject.enspin crossover
dc.subject.enX-ray diffraction
dc.subject.enfatigability
dc.subject.ensingle crystal
dc.subject.enphase transition
dc.subject.enstructural disorder
dc.title.enMosaicity of spin-crossover crystals
dc.typeArticle de revue
dc.identifier.doi10.3390/cryst8090363
dc.subject.halChimie/Matériaux
bordeaux.journalCrystals
bordeaux.page363
bordeaux.volume8
bordeaux.issue9
bordeaux.peerReviewedoui
hal.identifierhal-01875493
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01875493v1
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