A structural study of very high-density amorphous ice

被引：29

作者：

Guthrie, M

Tulk, CA ^{[1
]}

Benmore, CJ

Klug, DD

机构：

[1] Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37831 USA

[2] Argonne Natl Lab, Argonne, IL 60439 USA

[3] Natl Res Council Canada, Ottawa, ON K0A 0R6, Canada

来源：

CHEMICAL PHYSICS LETTERS | 2004年 / 397卷 / 4-6期

关键词：

D O I：

10.1016/j.cplett.2004.07.116

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Neutron and X-ray structure factor functions of very high-density amorphous (VHDA) ice have been measured and compared with those of the high- and low-density amorphous forms. The principal peak in the VHDA structure factor is sharper than that observed in the HDA ice form. Radial distribution functions (rdfs) indicate the local O...O separation is 2.83 Angstrom, close to 2.85 Angstrom estimated from earlier Raman measurements, but larger than that observed by empirical potential structure refinement simulation of neutron data. Perhaps more importantly the rdfs indicate a greater extent of ordering in VHDA ice, with observable coordination shells extending to at least 20 Angstrom. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：335 / 339

页数：5

共 17 条

[1] Structure of a new dense amorphous ice [J].