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Vibrational Spectra of Ca(BH4)2

机译:Ca(BH4)2的振动光谱

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摘要

IR and Raman data were obtained from α-, β-, and mixed (β,γ)-Ca(BH4)2 samples and from the deuterated β,γ phase mixture. The results obtained with α phase indicate that the DFT calculated values for the B—H stretching modes and the lattice vibrations are fairly close to the experimental values. The spectral behavior at temperatures around the transition to the β phase shows a continuous transition and suggests the presence of disorder caused by reorientational motions of the [BH4]~- ion in the β phase. The data indicate that there are more deformation bands observed for the mixed (β,γ) samples than for the α phase which indicates structural variations between the β and the γ phases.
机译:IR和拉曼数据是从α-,β-和混合的(β,γ)-Ca(BH4)2样品以及氘化的β,γ相混合物获得的。用α相获得的结果表明,BH拉伸模式和晶格振动的DFT计算值与实验值相当接近。在过渡到β相附近的温度下的光谱行为显示出连续的过渡,表明存在由[BH4]〜-离子在β相中重新定向运动引起的无序现象。数据表明,混合样品(β,γ)比α相观察到更多的形变带,这表明β相和γ相之间的结构变化。

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