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Low- and high-temperature structures of YbCuBi
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Andriy V. Tkachuk
Published/Copyright:
September 25, 2009
Abstract
A variable temperature single-crystal X-ray diffraction study was undertaken on the intermetallic compound YbCuBi, which undergoes a phase transition at ∼375 K. At low temperatures (T = 193 K, a = 4.5821(3) Å, c = 7.8107(8) Å; T = 295 K, a = 4.5825(6) Å, c = 7.8597(10) Å), YbCuBi adopts the LiGaGe-type (ordered CaIn2-type) structure (Pearson symbol hP6, space group P63mc, Z = 2). At high temperatures (T = 393 K, a = 4.5885(14) Å, c = 7.913(2) Å; T = 473 K, a = 4.594(4) Å, c = 7.928(6) Å), YbCuBi adopts the ZrBeSi-type (ordered Ni2In-type) structure (Pearson symbol hP6, space group P63/mmc, Z = 2). The structure consists of Yb atoms separating hexagonal ∞2[CuBi] nets, which are buckled at low temperatures but planar at high temperatures.
Keywords: Phase transition; Bismuth; Intermetallics; Single crystal structure analysis; X-ray diffraction
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Published Online: 2009-9-25
Published in Print: 2006-5-1
© by Oldenbourg Wissenschaftsverlag, München
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Keywords for this article
Phase transition;
Bismuth;
Intermetallics;
Single crystal structure analysis;
X-ray diffraction
Articles in the same Issue
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- Fritz H. Laves – 100 years young
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- Gustav E. R. Schulze's pioneering work on Laves phases
- Preparation, phase stability and structure of the C36 Laves phase Nb1–xCo2+x
- Atom order and thermodynamic properties of the ternary Laves phase Ti(TiyNixAl1–x–y)2
- Atomic ordering in the Laves phases L1 V(Co1–xSix)2 (x = 0.43 and 0.56)
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