PHASE CHANGE OF LAUMONTITE UNDER RELATIVE HUMIDITY-CONTROLLED CONDITIONS
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概要
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Several previous studies of the hydration and dehydration process of laumontite have been performed, however, they have been carried out at room temperature without humidity-controlled conditions. The process is investigated by gravimetry and X-ray powder diffractometry under the conditions of controlled relative humidity (RH) at 25℃. The results show that laumontite has the following three phases in the atmosphere from 0 to 100% RH. (1) 12H_2O phase (The phase contains ca. 12 water molecules per unit cell). The cell parameters are a=14.71 (1)Å, b=13.09 (1)Å, c=7.46 (1)Å and β=112.1 (1)°(0% RH). (2) 14H_2O phase. The cell parameters are a=14.77 (1)Å, b=13.09 (1)Å, c=7.58 (1)Å and β=112.0 (2)°(50% RH). (3) 16-18H_2O phase. The cell parameters are a=14.90 (2)Å, b=13.19 (1)Å, c=7.55 (1)Å and β=110.2 (1)°(100% RH).
- 日本粘土学会の論文
著者
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YAMAZAKI ATSUSHI
Department of Resources and Environmental Engineering, School of Creative Science and Engineering, W
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OTSUKA RYOHEI
Department of Mineral Resources Engineering, School of Science and Engineering, Waseda University
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Nishido Hirotsugu
Hiruzen Research Institute Okayama University Of Science
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Otsuka Ryohei
Department Of Mineral Industry School Of Science And Engineering ; Science And Engineering Research
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Otsuka Ryohei
Department Of Mineral Resources Engineering School Of Science And Engineering Waseda University
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SHIRAKI TAKAHIRO
Department of Mineral Resources Engineering, School of Science and Engineering, Waseda University
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Yamazaki Atsushi
Department Of Biotechnology Biological Resource Center (nbrc) National Institute Of Technology And E
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Shiraki Takahiro
Department Of Mechanical Engineering Doshisha University
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Shiraki Takahiro
Department Of Mineral Resources Engineering School Of Science And Engineering Waseda University
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Yamazaki Atsushi
Department Of Mineral Resources Engineering School Of Science And Engineering Waseda University
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