Инд. авторы:	Yoneda A., Cooray T., Shatskiy A.
Заглавие:	Single-crystal elasticity of stishovite: New experimental data obtained using high-frequency resonant ultrasound spectroscopy and a Gingham check structure model
Библ. ссылка:	Yoneda A., Cooray T., Shatskiy A. Single-crystal elasticity of stishovite: New experimental data obtained using high-frequency resonant ultrasound spectroscopy and a Gingham check structure model // Physics of the Earth and Planetary Interiors. - 2012. - Vol.190-191. - P.80-86. - ISSN 0031-9201. - EISSN 1872-7395.
Внешние системы:	DOI: 10.1016/j.pepi.2011.11.003; SCOPUS: 2-s2.0-84155191169;
Реферат:	eng: Single-crystal elasticity of stishovite was examined using a new experimental technique and an empirical macroscopic model. Employing high-frequency resonant ultrasound spectroscopy, single-crystal elastic constants of stishovite were determined: C 11=443(3), C 33=781(4), C 12=193(2), C 23=199(2), C 44=256(2), and C 33=316(2)GPa. The frequency range of the resonant ultrasound spectroscopy techniques was 6-20MHz, which is much lower than the ~10GHz range of the Brillouin scattering technique. Of the elastic constants, the shear elastic constants C 44 and C 66 are consistent with the average value of the previously mentioned Brillouin scattering. Conversely, the four elastic constants, C 11, C 33, C 12, and C 23, slightly deviate outside the range of previous Brillouin scattering results. The present results, except those for C 12, are consistent with recent lattice dynamic analysis of inelastic X-ray scattering data. The adiabatic bulk modulus was calculated as 298GPa, which is smaller and more consistent with the result of compression experiments than any other Brillouin scattering results (301-312GPa). The present result shows greater P-wave velocity anisotropy (24.7%) than any preceding work. To understand the unique elastic properties of stishovite, the Gingham check model was proposed and examined. The result shows that the octahedron of 6-coordinated Si in stishovite crystal has stiffness comparable to that of diamond. © 2011 Elsevier B.V.
Ключевые слова:	Adiabatic bulk modulus; Stishovite; Resonant ultrasound spectroscopy; Finite element method; Elasticity; Bulk modulus; Acoustic velocity; Acoustic wave velocity; Finite element method; Elasticity; Elastic moduli; ultrasonics; stishovite; stiffness; spectral analysis; pressure effect; P-wave; finite element method; experimental study; experimental mineralogy; elasticity; crystal structure; bulk modulus; acoustics; Ultrasonic applications; X ray scattering; Ultrasonics; Scattering; Elastic constants; Dynamic analysis; Crystal structure; Brillouin scattering; Acoustic wave velocity measurement; Acoustic spectroscopy; Stishovite; Resonant Ultrasound Spectroscopy; P-wave velocity; Macroscopic model; Inelastic X ray scattering; High frequency HF; Frequency ranges; Experimental techniques; Experimental data; Elastic properties; Average values; Check structures;
Издано:	2012
Физ. характеристика:	с.80-86