Structure of a high-order icosahedral approximant phase in Mg–Ga–Al–Zn system
Structure of a high-order icosahedral approximant phase in Mg–Ga–Al–Zn system
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Mg-Ga-Al-Zn系高阶二十面体近似相的结构
DOI：
10.1080/09500839108214673
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
U. Mizutani
中科院分区：
文献类型：
--
作者：
K. Edagawa;Kunio Suzuki;M. Ichihara;S. Takeuchi;A. Kamiya;U. Mizutani
Abstract The melt-spun Mg39·5Ga16·4 A14·1Zn40·0 ribbon consists entirely of micrograins of an icosahedral phase (I-phase). The calorimetric and X-ray diffraction studies have shown that the I-phase undergoes an exothermic transformation to an approximant crystalline phase at 630 K on heating at a rate of 20 K min−1. Detailed structural analysis of the crystalline phase has revealed that the phase corresponds to a 3/2–2/1–2/1 rational approximant of I-phase, which has the orthorhombic C-type Bravais lattive with large cell parameters, a = 36·93 ± 0·06 A, b = 22·83 ± 0·04 A and c = 22·96 ± 0·04 A.
