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Crystal structure and twinning of HfPdGe
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Yurii Prots
Published/Copyright:
September 25, 2009
The crystal structure of the intermetallic compound HfPdGe is investigated by means of X-ray single crystal and high-resolution synchrotron powder diffraction in combination with light microscopy. Investigated specimens exhibit twinning which can be described by a six-domain model of a monoclinic basic structure. The crystal structure of HfPdGe (space group P21/m, Pearson symbol mP18, a = 6.6573(1) Å, b = 3.9359(1) Å, c = 11.4411(2) Å, β = 90.102(1)°, Z = 6) comprises a three-dimensional polyanion of alternating palladium and germanium atoms with Pd—Ge distances varying between 2.499(2) Å and 2.647(3) Å. The structural motif of HfPdGe contains fragments of the TiNiSi and the ZrNiAl structure types.
Keywords: Equiatomic intermetallic compound; Twinning; Pseudo-reticular merohedry; Ternary germanide; Polyanionic compound; Single crystal structure analysis; Powder structure analysis; X-ray diffraction; Synchrotron radiation
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Received: 2007-April-19
Accepted: 2007-May-10
Published Online: 2009-09-25
Published in Print: 2007-10
© Oldenbourg Wissenschaftsverlag
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Articles in the same Issue
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- Spatial chemistry of the aluminium—platinum compounds: a quantum chemical approach
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- Crystal-structure determination of the fluorescent bisazomethine pigment C36H26N4O4 from X-ray powder data
- Refinement strategies for fullerene structures: use of local, non-crystallographical point group symmetry
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