Stoructural science and various functions in hydorogen-bond materials. Geometric Isotope Effect and Structural Phase Transition.

• ICHIKAWA Mizuhiko

  Division of Physics, Graduate School of Science, Hokkaido University

Bibliographic Information

Other Title

• 水素結合における構造物性と機能　　幾何学的同位体効果と構造相転移
• キカガクテキ ドウイタイ コウカ ト コウゾウ ソウ テンイ

Abstract

A review is given of the deuteration effect on the crystal structure, in particular on the hydrogen-bond system, and its relation to the phase transition. The correlation between hydrogen-bond parameters and some examples of peculiar phase diagrams between deuterium content and temperature are discussed in the context of the geometric isotope effect. Similarity and difference between the deuteration effect and the negative pressure effect are discussed in the case of KH₂PO₄ and squaric acid (H₂C₄O₄) . It is pointed out that the hydrogen bond is not necessarily the softest part of the crystal as usually assumed, and pressure effect is responded by rotation of the PO₄ or C₄O₄ group as well. The case of (NH₄) ₃H (SO₄) ₂ is discussed as an example where a surprising similarity between deuteration and positive pressure effect is seen in their phase diagrams.

Journal

• Nihon Kessho Gakkaishi

  Nihon Kessho Gakkaishi 40 (1), 10-18, 1998

  The Crystallographic Society of Japan

Details

• CRID: 1390282679064084096
• NII Article ID: 10002590099
• NII Book ID: AN00188364
• DOI: 10.5940/jcrsj.40.10
• ISSN: 18845576
• ISSN: 03694585
• NDL BIB ID: 4446279
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4446279
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed