The crystal structure of arsenic telluroxide AsTe 0.5 O 2

The crystal structure of arsenic telluroxide AsTe 0.5 O 2 Abstract Single crystals of AsTe 0.5 O 2 were prepared hydrothermally. The crystal structure was determined by using the intensities of 206 independent reflections, measured on a computer-controlled single-crystal diffractometer (Philips PW 1100). The cell constants, refined by least-squares, are a = b = 4.157(1) Å, c = 7.127(7) Å, Z = 1; space group P 3. Solution of the structure was essentialy effected by direct methods combined with successive Fourier syntheses. The positional and anisotropic thermal parameters were refined by full-matrix least-squares calculations. Absorption and anomalous dispersion corrections were applied to all atoms. The final R value was 0.054. The As atom is coordinated by six O atoms forming a right trigonal prism. The Te atom site is partially occupied by Te atoms with a population parameter 0.5 and surrounded by six O atoms also forming a right trigonal prism. The structure looks like that of NiAs. Each of the AsO 6 prisms is linked with three TeO 6 prisms by common O(2)—O(2) triangular edges and three pairs of AsO 6 prisms by common O(1)—O(2) prismatic edges and vice versa. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Zeitschrift für Kristallographie - Crystalline Materials de Gruyter

The crystal structure of arsenic telluroxide AsTe 0.5 O 2

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Publisher
de Gruyter
Copyright
Copyright © 1993 by the
ISSN
2194-4946
eISSN
2196-7105
DOI
10.1524/zkri.1993.205.Part-1.27
Publisher site
See Article on Publisher Site

Abstract

Abstract Single crystals of AsTe 0.5 O 2 were prepared hydrothermally. The crystal structure was determined by using the intensities of 206 independent reflections, measured on a computer-controlled single-crystal diffractometer (Philips PW 1100). The cell constants, refined by least-squares, are a = b = 4.157(1) Å, c = 7.127(7) Å, Z = 1; space group P 3. Solution of the structure was essentialy effected by direct methods combined with successive Fourier syntheses. The positional and anisotropic thermal parameters were refined by full-matrix least-squares calculations. Absorption and anomalous dispersion corrections were applied to all atoms. The final R value was 0.054. The As atom is coordinated by six O atoms forming a right trigonal prism. The Te atom site is partially occupied by Te atoms with a population parameter 0.5 and surrounded by six O atoms also forming a right trigonal prism. The structure looks like that of NiAs. Each of the AsO 6 prisms is linked with three TeO 6 prisms by common O(2)—O(2) triangular edges and three pairs of AsO 6 prisms by common O(1)—O(2) prismatic edges and vice versa.

Journal

Zeitschrift für Kristallographie - Crystalline Materialsde Gruyter

Published: Jan 1, 1993

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