Ultra-flexible framework breathing in response to dehydration in liskeardite, [(Al,Fe)16(AsO4)9(OH)21(H2O)11]·26H2O, a natural open-framework compound

Simple item page
dc.contributor.authorGrey, IEen_AU
dc.contributor.authorBrand, HEAen_AU
dc.contributor.authorRumsey, MSen_AU
dc.contributor.authorGozukara, Yen_AU
dc.date.accessioned2021-12-07T22:17:10Zen_AU
dc.date.available2021-12-07T22:17:10Zen_AU
dc.date.issued2015-05-02en_AU
dc.date.statistics2021-11-12en_AU
dc.description.abstractDehydration of the natural open-framework compound, liskeardite, [(Al,Fe)16(AsO4)9(OH)21(H2O)11]·26H2O, is accompanied by a change in the sign of the thermal expansion from positive to negative above room temperature, and at ~100 °C the structure undergoes a dramatic 2D contraction by co-operative rotation of heteropolyhedral columns that constitute the framework walls. Monoclinic liskeardite, I112 with a≈b≈24.7 Å, c ≈7.8 Å and β≈90° is transformed to a tetragonal phase, I-4 with a≈20.6 Å, c ≈7.7 Å. The associated 30% decrease in volume is unprecedented in inorganic microporous compounds. The flexibility of the contraction is related to the double-hinged nature of the column rotations about [001]. Octahedra in adjacent columns are interconnected by corner-sharing with the two pairs of anions forming opposing edges of AsO4 tetrahedra, so a double-hinged rotation mechanism operates. Thermal analysis and mass spectroscopic results for liskeardite show that the phase transition at ~100 °C is related to removal of the channel water. The tetragonal phase shows exceptionally large NTE behaviour. Over the temperature range 148–178 the NTE along a and b is close to linear with a magnitude of the order of −900×10−6 °C−1. The contraction along the channel direction is smaller but still appreciable at −200×10−6 °C−1. © 2015 Elsevier Inc.en_AU
dc.identifier.citationGrey, I. E., Brand, H. E.A., Rumsey, M. S., & Gozukara, Y. (2015). Ultra-flexible framework breathing in response to dehydration in liskeardite, [(Al,Fe)16(AsO4)9(OH)21(H2O)11]·26H2O, a natural open-framework compound. Journal of Solid State Chemistry, 228, 146-152. doi:10.1016/j.jssc.2015.04.035en_AU
dc.identifier.issn0022-4596en_AU
dc.identifier.journaltitleJournal of Solid State Chemistryen_AU
dc.identifier.pagination146-152en_AU
dc.identifier.urihttps://doi.org/10.1016/j.jssc.2015.04.035en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12382en_AU
dc.identifier.volume228en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectX-ray diffractionen_AU
dc.subjectVolumeen_AU
dc.subjectStructural modelsen_AU
dc.subjectDehydrationen_AU
dc.subjectThermal expansionen_AU
dc.subjectPhase transformationsen_AU
dc.subjectInorganic compoundsen_AU
dc.subjectRotationen_AU
dc.titleUltra-flexible framework breathing in response to dehydration in liskeardite, [(Al,Fe)16(AsO4)9(OH)21(H2O)11]·26H2O, a natural open-framework compounden_AU
dc.typeJournal Articleen_AU
Files
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Journal Articles