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Mashiyama Hiroyuki

Affiliate Master Yamaguchi University

Crystal structures of betaine phosphate/Arsenate mixed crystal

Journal of the Physical Society of Japan Volume 70 Issue 6 Page 1598-1603
published_at 2001
2008010265.pdf
[fulltext] 263 KB
Title
Crystal structures of betaine phosphate/Arsenate mixed crystal
Creators Yoshida Takashi
Creators Mashiyama Hiroyuki
Creators Mochida Tomoyuki
Creator Keywords
crystal structure X-ray diffraction betaine phosphate arsenate mixed crystal
Single crystals of a betaine-phosphate/arsenate mixed system (30% P was replaced with As randomly) were investigated by means of X-ray diffraction. The crystal structures of room temperature and of low temperature (20 K) were determined. At room temperature, the least-squares calculation converged at the R factor 3.6% with 1038 reflections. The structure is isomorphous to pure betaine phosphate. For the low-temperature structure the R factor converged at 4.3% with 4896 reflections (3.7% with 2987 normal reflections and 9.6% with 1909 superlattice reflections). The structure analysis clarifies that the hydrogen atoms of the phosphoric acid between neighboring phosphate tetrahedra are ordered in the low temperature phase resulting the superstructure (the unit cell dimension along the a-axis is doubled). By replacing P with As up to 30% in P(As)O_4 tetrahedra, the unit cell structure is changed little
Languages eng
Resource Type journal article
Publishers The Physical Society of Japan
Date Issued 2001
Rights
Copyright c (2002)The Physical Society of Japan()
File Version Author’s Original
Access Rights open access
Relations
[ISSN]0031-9015
[NCID]AA00704814
info:doi/10.1143/JPSJ.70.1598
[isVersionOf] [URI]http://www.ipap.jp/jpsj/index.html
Schools 大学院理工学研究科(理学)