Elasticity of single-crystal phase D (a dense hydrous magnesium silicate) by Brillouin spectroscopy

被引：20

作者：

Liu, LG ^{[1
]}

Okamoto, K ^{[1
]}

Yang, YJ ^{[1
]}

Chen, CC ^{[1
]}

Lin, CC ^{[1
]}

机构：

[1] Acad Sinica, Inst Earth Sci, Taipei 11529, Taiwan

来源：

SOLID STATE COMMUNICATIONS | 2004年 / 132卷 / 08期

关键词：

inorganic crystals; elasticity; mechanical properties; elastic light scattering;

D O I：

10.1016/j.ssc.2004.09.005

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Phase D (Mg2Si2O6H2) is the only hydrous magnesium silicate, where all Si atoms are octahedrally coordinated. The single-crystal elastic constants of phase D have been measured by Brillouin spectroscopy at ambient conditions. The elastic constants C-11, C-33, C-44, C-12, C-13 and C-14, based on a trigonal unit cell, are 284.4 +/- 3.0, 339.4 +/- 9.1, 120.7 +/- 1.9, 89.4 +/- 4.2, 126.6 +/- 3.1 and - 4.7 +/- 1.4 GPa, respectively. The aggregate adiabatic bulk modulus, using the Voigt-Reuss-Hill (VRH) scheme, is 175.3 +/- 14.8 GPa and the shear modulus is 104.4 +/- 13.6 GPa. These data yield the compressional-wave velocity, V-p = 9.70 +/- 0.51 km/s. and the shear-wave velocity, V-s = 5.59 +/- 0.36 km/s, at ambient conditions. Thus, phase D is not only the most closely packed but the least compressible hydrous magnesium silicate known to date. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：517 / 520

页数：4

共 21 条

[1]

Chen CC, 2001, AM MINERAL, V86, P1525

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