In situ spectroscopic study of water intercalation into talc: New features of 10 Å phase formation
In situ spectroscopic study of water intercalation into talc: New features of 10 Å phase formation
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滑石粉中水插层的原位光谱研究：10 Å 相形成的新特征
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
K. Litasov
中科院分区：
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作者：
S. Rashchenko;A. Likhacheva;S. Goryainov;A. Krylov;K. Litasov
摘要采用金刚石对顶砧装置，通过原位拉曼光谱研究了滑石粉与水在8 GPa和500 °C下反应合成10 Å相的过程。最初的快速（2小时）掺入层间水分子的滑石结构跟踪新的OH伸缩带在3592和3621 cm-1和几个框架带的位移逐渐增长。在HP-HT条件下7 h的进一步监测显示3592 cm-1谱带逐渐减弱，这可能与根据Pawley等人（2010）提出的模型通过硅烷醇基团的出现开始形成“长期”10 Ω相有关，影响层间氢键。
Abstract The synthesis of 10 Å phase via the reaction of talc plus water at 8 GPa and 500 °C was studied by in situ Raman spectroscopy using a diamond-anvil cell. The initial fast (2 h) incorporation of interlayer H2O molecules into the talc structure is traced by gradual growth of new OH stretching bands at 3592 and 3621 cm-1 and the shift of several framework bands. Further monitoring at HP-HT conditions over 7 h reveals gradual weakening of the 3592 cm-1 band, which can probably be related to the onset of the formation of “long-run” 10 Å phase through the appearance of silanol groups following the model proposed by Pawley et al. (2010), influencing the interlayer hydrogen bonding.