Incommensurately modulated cadmium apatites

Peter Alberius Henning; Marat Moustiakimov; Sven Lidin

doi:10.1006/jssc.1999.8571

Incommensurately modulated cadmium apatites

Peter Alberius Henning, Marat Moustiakimov, Sven Lidin

Stockholm University

Research output: Contribution to journal › Article › peer-review

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 structure a 'chain-packing' model was confirmed with a Br-Br distance of 3.466 Å. (C) 2000 Academic Press.

Original language	English
Pages (from-to)	154-158
Number of pages	5
Journal	Journal of Solid State Chemistry
Volume	150
Issue number	1
DOIs	https://doi.org/10.1006/jssc.1999.8571
Publication status	Published - 2000 Jan 1
Externally published	Yes

Free keywords

Bromine
Cadmiumapatite
Incommensurate modulation
Iodine

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10.1006/jssc.1999.8571

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title = "Incommensurately modulated cadmium apatites",

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:P{\=3}:(00γ): a = 16.932(2) {\AA}, c = 6.451(1) {\AA}, 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 {\AA}. (C) 2000 Academic Press.",

keywords = "Bromine, Cadmiumapatite, Incommensurate modulation, Iodine",

author = "Henning, {Peter Alberius} and Marat Moustiakimov and Sven Lidin",

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T1 - Incommensurately modulated cadmium apatites

AU - Henning, Peter Alberius

AU - Moustiakimov, Marat

AU - Lidin, Sven

PY - 2000/1/1

Y1 - 2000/1/1

N2 - 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.

AB - 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.

KW - Bromine

KW - Cadmiumapatite

KW - Incommensurate modulation

KW - Iodine

U2 - 10.1006/jssc.1999.8571

DO - 10.1006/jssc.1999.8571

M3 - Article

AN - SCOPUS:0033667351

SN - 0022-4596

VL - 150

SP - 154

EP - 158

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

IS - 1

ER -

Incommensurately modulated cadmium apatites

Abstract

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