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Powder diffraction data for the germanides CoGe and Co5Ge7

Published online by Cambridge University Press:  10 January 2013

N. Audebrand ,
M. Ellner  and
E. J. Mittemeijer
N. Audebrand
Affiliation:
Max Planck Institute for Metals Research, Seestrasse 92, D-70174 Stuttgart, Germany
M. Ellner
Affiliation:
Max Planck Institute for Metals Research, Seestrasse 92, D-70174 Stuttgart, Germany
E. J. Mittemeijer
Affiliation:
Max Planck Institute for Metals Research, Seestrasse 92, D-70174 Stuttgart, Germany
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Abstract

Precise X-ray powder diffraction data are given for two germanides, CoGe and Co5Ge7. The refined unit cell parameters for CoGe are a=11.630(1) Å, b=3.8014(3) Å, c=4.9347(3) Å and β=100.889(8)° (space group C2/m, Pearson symbol mC16) with volume of the unit cell 214.24(2) Å3; the figures of merit are M20=96, F30=77 (0.0085, 46). The refined unit cell parameters for Co5Ge7 are a=7.6262(4) Å and c=5.8017(5) Å (I4mm, tI24) with volume of the unit cell 337.42(3) Å3; the figures of merit are M20=204 and F22=130(0.0068, 25). The dependence on composition of the unit cell parameters of CoGe is discussed in terms of specific defect structures.

Type
New Diffraction Data
Information
Powder Diffraction , Volume 15 , Issue 2 , June 2000 , pp. 120 - 122
Copyright
Copyright © Cambridge University Press 2000

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