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Incommensurately modulated cadmium apatites

Henning, Peter Alberius LU ; Moustiakimov, Marat and Lidin, Sven LU (2000) In Journal of Solid State Chemistry 150(1). p.154-158
Abstract

Two cadmium apatites, Cd5(PO4)3Br and Cd5(VO4)3I, earlier reported to be halogenide deficient, were prime suspects of being modulated. In this study, incommensurate ordering was found in satellites occurring in planes perpendicular to c*. The structure of Cd5(PO4)3Br was refined from single-crystal X-ray diffraction data in the four-dimensional super space group R:P3̄:(00γ): a = 16.932(2) Å, c = 6.451(1) Å, Z = 6, R = 0.043. The modulation of the structure is due to a misfit between the large halogenide ions and the surrounding rigid Ca-PO4 substructure. From the refined model of the Cd5(PO4)3Br... (More)

Two cadmium apatites, Cd5(PO4)3Br and Cd5(VO4)3I, earlier reported to be halogenide deficient, were prime suspects of being modulated. In this study, incommensurate ordering was found in satellites occurring in planes perpendicular to c*. The structure of Cd5(PO4)3Br was refined from single-crystal X-ray diffraction data in the four-dimensional super space group R:P3̄:(00γ): a = 16.932(2) Å, c = 6.451(1) Å, Z = 6, R = 0.043. The modulation of the structure is due to a misfit between the large halogenide ions and the surrounding rigid Ca-PO4 substructure. From the refined model of the Cd5(PO4)3Br structure a 'chain-packing' model was confirmed with a Br-Br distance of 3.466 Å. (C) 2000 Academic Press.

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author
; and
publishing date
type
Contribution to journal
publication status
published
keywords
Bromine, Cadmiumapatite, Incommensurate modulation, Iodine
in
Journal of Solid State Chemistry
volume
150
issue
1
pages
5 pages
publisher
Elsevier
external identifiers
  • scopus:0033667351
ISSN
0022-4596
DOI
10.1006/jssc.1999.8571
language
English
LU publication?
no
id
d6952ebf-f41c-4419-97b7-a0c210658b3e
date added to LUP
2019-04-08 16:02:09
date last changed
2022-04-25 22:45:56
@article{d6952ebf-f41c-4419-97b7-a0c210658b3e,
  abstract     = {{<p>Two cadmium apatites, Cd<sub>5</sub>(PO<sub>4</sub>)<sub>3</sub>Br and Cd<sub>5</sub>(VO<sub>4</sub>)<sub>3</sub>I, earlier reported to be halogenide deficient, were prime suspects of being modulated. In this study, incommensurate ordering was found in satellites occurring in planes perpendicular to c*. The structure of Cd<sub>5</sub>(PO<sub>4</sub>)<sub>3</sub>Br was refined from single-crystal X-ray diffraction data in the four-dimensional super space group R:P3̄:(00γ): a = 16.932(2) Å, c = 6.451(1) Å, Z = 6, R = 0.043. The modulation of the structure is due to a misfit between the large halogenide ions and the surrounding rigid Ca-PO<sub>4</sub> substructure. From the refined model of the Cd<sub>5</sub>(PO<sub>4</sub>)<sub>3</sub>Br structure a 'chain-packing' model was confirmed with a Br-Br distance of 3.466 Å. (C) 2000 Academic Press.</p>}},
  author       = {{Henning, Peter Alberius and Moustiakimov, Marat and Lidin, Sven}},
  issn         = {{0022-4596}},
  keywords     = {{Bromine; Cadmiumapatite; Incommensurate modulation; Iodine}},
  language     = {{eng}},
  month        = {{01}},
  number       = {{1}},
  pages        = {{154--158}},
  publisher    = {{Elsevier}},
  series       = {{Journal of Solid State Chemistry}},
  title        = {{Incommensurately modulated cadmium apatites}},
  url          = {{http://dx.doi.org/10.1006/jssc.1999.8571}},
  doi          = {{10.1006/jssc.1999.8571}},
  volume       = {{150}},
  year         = {{2000}},
}