en
Scientific article
Open access
English

K3TaF8 from laboratory X-ray powder data

Publication date2010
Abstract

The crystal structure of tripotassium octafluoridotantalate, K3TaF8, determined from laboratory powder diffraction data by the simulated annealing method and refined by total energy minimization in the solid state, is built from discrete potassium cations, fluoride anions and monocapped trigonal–prismatic [TaF7]2+ ions. All six atoms in the asymmetric unit are in special positions of the P63mc space group: the Ta and one F atom in the 2b (3m) sites, the K and two F atoms in the 6c (m) sites, and one F atom in the 2a (3m) site. The structure consists of face-sharing K6 octahedra with a fluoride anion at the center of each octahedron, forming chains of composition [FK3]2+ running along [001] with isolated [TaF7]2- trigonal prisms in between. The structure of the title compound is different from the reported structure of Na3TaF8 and represents a new structure type.

Research group
Citation (ISO format)
SMRČOK, Ľubomír et al. K<sub>3</sub>TaF<sub>8</sub> from laboratory X-ray powder data. In: Acta crystallographica. Section C, Crystal structure communications, 2010, vol. 66, n° 2, p. i16–i18. doi: 10.1107/S0108270109055140
Main files (1)
Article (Published version)
accessLevelPublic
Identifiers
ISSN of the journal0108-2701
540views
343downloads

Technical informations

Creation04/08/2014 10:29:00 AM
First validation04/08/2014 10:29:00 AM
Update time03/14/2023 9:05:56 PM
Status update03/14/2023 9:05:55 PM
Last indexation01/16/2024 2:16:18 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack