Thermal expansion of decagonal Al70.7Co13.3Ni16.0 in the temperature range 15–300 K
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A. Kupsch
Abstract
The temperature dependence of lattice parameters a in the quasiperiodic plane and c in the periodic direction of decagonal Al70.7Co13.3Ni16.0 was probed using X-ray powder diffraction in the temperature range 15–300 K. Both parameters were fitted by means of positions of 22 Bragg reflections for each temperature. Temperature dependences were modelled best by second order polynomials leading to linear thermal coefficients α(T) = 8.1(33) · 10–7K–1 + 3.9(2)· 10–8K–2T in the quasiperiodic plane and γ(T) = 1.7(6) · 10–6K–1 + 3.8(3) · 10–8K–2T in the periodic direction, respectively. Thus we found the anisotropy ratio γ(T)/α(T) to decrease with increasing temperature from 1.10 (at 15 K) to 1.19 (at 300 K). Besides pecularities around 150 K indicating an intermediate phase formed by superordering, we observed deviations from the general smooth course between 15K and 50K for both lattice parameters.
© 2001 Oldenbourg Wissenschaftsverlag GmbH
Artikel in diesem Heft
- Thermal expansion of decagonal Al70.7Co13.3Ni16.0 in the temperature range 15–300 K
- The intermediate phase of strontium chromate aluminate sodalite
- Crystal structure and elastic properties of betaine fumarate and of betaine maleate, two isomers of ((CH3)3NCH2COOH . OOC(CH)2COOH
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- Synthesis and crystal structure determination of 6-phenyl-5-phenylsulfonyl-1,2,3,4-tetrahydropyrimidine-2-thione from neutron powder diffraction data
- A contribution to the crystal chemistry of DL-malates
- Absorption correction for crystal-environment attachments from direction cosines
- Book Review
Artikel in diesem Heft
- Thermal expansion of decagonal Al70.7Co13.3Ni16.0 in the temperature range 15–300 K
- The intermediate phase of strontium chromate aluminate sodalite
- Crystal structure and elastic properties of betaine fumarate and of betaine maleate, two isomers of ((CH3)3NCH2COOH . OOC(CH)2COOH
- Synthesis, electronic and crystal structure of a new organic semiconductor tetramethyltetrathiafulvalene-trinitroresorcinol (2:1), (TMTTF)2(C6H2N3O8)
- Synthesis and crystal structure determination of 6-phenyl-5-phenylsulfonyl-1,2,3,4-tetrahydropyrimidine-2-thione from neutron powder diffraction data
- A contribution to the crystal chemistry of DL-malates
- Absorption correction for crystal-environment attachments from direction cosines
- Book Review
