NEUTRON REFINEMENTS OF NACU2(H3O2)(SO4)2 AND RBCU2(H3O2)(SEO4)2 - VARIATION OF THE HYDROGEN-BOND SYSTEM IN THE NATROCHALCITE-TYPE SERIES

被引：26

作者：

CHEVRIER, G ^{[1
]}

GIESTER, G ^{[1
]}

ZEMANN, J ^{[1
]}

机构：

[1] UNIV VIENNA,INST MINERAL & KRISTALLOG,A-1010 VIENNA,AUSTRIA

来源：

ZEITSCHRIFT FUR KRISTALLOGRAPHIE | 1993年 / 206卷

关键词：

NACU2(H3O2)(SO4)2; RBCU2(H3O2)(SEO4)2; NATROCHALCITE-TYPE COMPOUNDS; HYDROGEN BONDS IN H3O2 CONFIGURATION;

D O I：

10.1524/zkri.1993.206.Part-1.7

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

In the natrochalcite-type compounds NaCu2(H3O2)(SO4)2 and RbCu2(H3O2)(SeO4)2 the lengths of the two different hydrogen bridges vary widely: 2.44 angstrom and 2.70 angstrom in the Na-S member, and 2.60 angstrom and 3.03 angstrom in the Rb-Se member. Both structures were refined by single-crystal neutron diffraction methods. Least-squares refinements (harmonic vibrations for all atoms) resulted in a splitting of the H atom positions of the short bridges by 0.265(13) angstrom in the Na-S member, and by 0.472(6) angstrom in the Rb-Se member. In the two compounds no clear evidence for an ordering of the split position of the H atom was found.

引用

页码：7 / 14

页数：8

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