Neutron diffraction study of hydrous phase G: Hydrogen in the lower mantle hydrous silicate, phase G
Neutron diffraction study of hydrous phase G: Hydrogen in the lower mantle hydrous silicate, phase G
复制标题
水合相 G 的中子衍射研究：下地幔水合硅酸盐中的氢，G 相
DOI：
10.1029/2001gl013260
复制
发表时间：
2001
影响因子：
5.2
通讯作者：
T. Chatake
中科院分区：
文献类型：
--
作者：
A. Suzuki;E. Ohtani;T. Kondo;T. Kuribayashi;N. Niimura;K. Kurihara;T. Chatake
进行中子粉末衍射研究以确定氢在DHMS相G结构中占据的位置，该相在过渡区和下地幔的压力-温度条件下稳定。在日本JAERI东海实验室的JRR-3 M核电站的BIX-3光束线上，使用高灵敏度成像板检测器收集小样品（约3 mg）的衍射数据。目前的中子衍射数据表明，氢（和氘）位于6 k位的Wykoff字母的MO 6层的相G结构的空间群。O-H和O-D的键长分别为1.1（4）和0.8（3）π。这一结果与以前的拉曼光谱研究相一致。
A neutron powder diffraction study was performed to determine the sites occupied by hydrogen in the structure of DHMS phase G, which is stable at the pressure‐temperature conditions of the transition zone and lower mantle. The diffraction data from small samples (about 3 mg) were collected by using a highly sensitive imaging plate detector at the BIX‐3 beamline at JRR‐3M nuclear plant in JAERI Tokai Laboratory, Japan. The present neutron diffraction data reveal that hydrogen (and deuterium) is located in the 6k site of Wykoff letter in the MO6 layer of the phase G structure with the space group . The bond lengths of O‐H and O‐D are 1.1(4) and 0.8(3) Å, respectively. This result is consistent with previous Raman spectroscopic studies of this phase.