A neutron-diffraction study of the tetragonal crystal structures of some yttrium-holmium dicarbides
A neutron-diffraction study of the tetragonal crystal structures of some yttrium-holmium dicarbides
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DOI：
10.1016/0022-4596(84)90115-4
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发表时间：
1984-07
影响因子：
3.3
通讯作者：
D. W. Jones;I. J. Mccolm;R. Steadman;J. Yerkess
中科院分区：
文献类型：
--
作者：
D. W. Jones;I. J. Mccolm;R. Steadman;J. Yerkess
在室温下，对钇钬二元碳化物YxHo 1 − xC 2（x = 0.75、0.50和0.25）和二元二元碳化物YC 2和HoC 2的中子粉末衍射数据进行了晶体结构线轮廓的修正。这五个化合物是同构的，其四元晶胞尺寸在a = 3.663（1），c= 6.171（1）<$（对于YC 2）到a = 3.646（1），c= 6.142（1）<$（对于HoC 2）的范围内，并且它们含有离散的炔属C-C基团，其碳-碳键长接近1.28 <$。
Crystal structure line profile refinements have been made for neutron powder diffraction data collected at room temperature from the ternary yttrium-holmium dicarbides YxHo1−xC2, withx= 0.75, 0.50, and 0.25, and the binary dicarbides YC2and HoC2. The five compounds are isostructural, with tetragonal unit-cell dimensions in the rangea= 3.663(1),c= 6.171(1) Å (for YC2) toa= 3.646(1),c= 6.142(1) Å (for HoC2), and they contain discrete acetylenic C-C groups with carbon-carbon bond lengths close to 1.28 Å.