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Okamoto, Yoshihiro; Fukushima, Kazuko*; Iwadate, Yasuhiko*
Journal of Non-Crystalline Solids, 312(314), p.450 - 453, 2002/10
Local structure of molten ZnBr was investigated by both of the Zn and the Br XAFS (X-ray absorption fine structure) measurements above their K-absorption edge at 723 K. The nearest Zn-Br distance was determined to be 2.46 for the Zn XAFS and 2.45 for the Br XAFS. The coordination number of Br ion around Zn was about 4. On the other hand, that of Zn ion around Br was about 2. The 1st Br-Br distance was estimated to be 3.9 . They shows that a tetrahedral coordinate (ZnBr) exists and most of the coordinate connects with the next ones through Br ion. The two XAFS functions in the molten ZnBr were reproduced by the combination of the molecular dynamics(MD) simulation and the FEFF7 computations.
Katayama, Yoshinori
Journal of Non-Crystalline Solids, 312-314, p.8 - 14, 2002/10
Times Cited Count:29 Percentile:83.93(Materials Science, Ceramics)Recently, we have found a sharp pressure-induced structural change between two characteristic structures of liquid phosphorus by an in-situ high-temperature high-presusre x-ray diffraction method using a JAERI beamline, BL14B1, at SPring-8. Our observations --- existence of molecular and polymeric liquids, sharp and reversible change between them and coexistence of two structures during the change --- strongly support that the structural change is a first-order liquid-liquid phase transition. It has been confirmed that the two liquid phases have different densities by a determination of melting curve by x-ray diffraction and by a density measurement by means of x-ray absorption. The structure of liquid P under high pressure resembles that of liquid arsenic.
Suzuya, Kentaro; Shibata, Kaoru*; Seto, Makoto*; Kitao, Shinji*; Yoda, Yoshitaka*; Kashihara, Yasuharu*; Tsai, A.*
Journal of Non-Crystalline Solids, 312-314, p.508 - 512, 2002/10
Times Cited Count:2 Percentile:30.84(Materials Science, Ceramics)no abstracts in English