Structure of B2O3 glass at high pressure:: A 11B solid-state NMR study -: art. no. 165507

被引：87

作者：

Lee, SK ^{[1
]}

Mibe, K

Fei, YW

Cody, GD

Mysen, BO

机构：

[1] Seoul Natl Univ, Sch Earth & Environm Sci, Seoul 151742, South Korea

[2] Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.94.165507

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report spectroscopic evidence for the pressure-induced structural changes in B2O3 glass quenched from melts at pressures up to 6 GPa using solid-state NMR. While all borons are tri-coordinated at 1 atm, the fraction of tetra-coordinated boron increases with pressure, being about 5% and 27% in the B2O3 glass quenched from melts at 2 and 6 GPa, respectively. The fraction of boroxol ring species increases with pressure up to 2 GPa and apparently decreases with further compression up to 6 GPa. Two densification mechanisms are proposed to explain the variation of boron species with pressure.

引用

页数：4

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