TECHNIQUES FOR NEUTRON DIFFRACTION ON SOLIDIFIED GASES TO 10 GPA AND ABOVE: APPLICATIONS TO ND3 PHASE IV
TECHNIQUES FOR NEUTRON DIFFRACTION ON SOLIDIFIED GASES TO 10 GPA AND ABOVE: APPLICATIONS TO ND3 PHASE IV
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10 GPA 及以上固化气体的中子衍射技术：ND3 第四阶段的应用
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
W. G. Marshall
中科院分区：
文献类型：
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作者：
S. Klotz;M. Gauthier;J. Besson;G. Hamel;R. Nelmes;J. Loveday;R. M. Wilson;W. G. Marshall
含氢化合物在常温下是气态的，中子粉末衍射能提供重要的结构信息。然而，对于高压研究，这种技术受到以下事实的严重限制：（a）不可能将这种气体装入大体积装置中，（B）不可能将它们压缩到大约1 GPa以上的高压。在这封信中，我们表明，使用以前描述的压力单元，可以加载各种气体样品，并与标准碳化钨砧压缩到10GPa。我们说明了中子粉末衍射数据最近收集的氘代氨ND3阶段IV，在几个小时的收集时间后获得准确的结构数据的技术的有效性。
Neutron powder diffraction can provide important structural information on hydrogenous compounds which are gases at ambient temperature. For high pressure studies, however, this technique has been seriously limited by the fact that it was impossible (a) to load such gases in large volume devices and (b) to compress them to elevated pressures above some 1 GPa. In this letter we show that, using a previously described pressure cell, a wide range of gaseous samples may be loaded and compressed to ∼10 GPa with standard tungsten carbide anvils. We illustrate the effectiveness of the technique with neutron powder diffraction data recently collected on deuterated ammonia ND3 phase IV, where accurate structural data were obtained after a few hours collection time.