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Pressure-induced structural phase transition in rare-earth trihydrides. Part I. (GdH3, HoH3, LuH3)

机译:稀土三氢化物中压力引起的结构相变。第一部分(GdH3,HoH3,LuH3)

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摘要

High-pressure X-ray diffraction studies of gadolinum, holmium and lutetium trihydrides have been carried out in a diamond anvil cell up to 30 GPa at room temperature. A reversible structural phase transformation from the hexagonal to cubic phase has been observed for all the hydrides investigated. These results confirm our first discovery of the hexagonal to cubic phase transition in erbium trihydride published recently [T. Palasyuk, M. Tkacz, Solid State Commun. 130 (2004) 219.[1]]. The lattice parameters of the new cubic phases and the volume changes at transition points were determined for SmH3, GdH3, and HoH3. The parameters of the equation of state for all the hexagonal and cubic phases of the investigated compounds have been determined. (C) 2004 Elsevier Ltd. All rights reserved.
机译:room 、,和tri的氢化物的高压X射线衍射研究已在室温下高达30 GPa的金刚石砧室中进行。对于所有研究的氢化物,已经观察到从六方相到立方相的可逆结构相变。这些结果证实了我们在最近发表的三氢化中六方相向立方相变的首次发现[T. Palasyuk,M。Tkacz,固态社区。 130(2004)219. [1]。确定了SmH3,GdH3和HoH3的新立方相的晶格参数和过渡点的体积变化。确定了所研究化合物的所有六方相和立方相的状态方程参数。 (C)2004 Elsevier Ltd.保留所有权利。

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