多晶KAlSi3O8 hollandite [liebermannite]的合成与表征:声速与压强在室温下达到13 GPa

IF 2 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY
Ting Chen , Gabriel D. Gwanmesia , Lars Ehm , Charles Le Losq , Daniel R. Neuville , Brian L. Phillips , Baosheng Li , Robert C. Liebermann
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引用次数: 3

摘要

在单轴裂球装置中,以玻璃为原料,在14.5 GPa和1473 K的温度下合成了利伯曼尼石[KAlSi3O8 hollandite]的多晶试样。回收的样品为纯四方荷兰石[SG: I4/m],体积密度在x射线测量值的98%以内。并用拉曼光谱和核磁共振光谱对样品进行了表征。用Al2O3作为压力标记,在单轴劈裂圆柱装置中,用超声干涉测量法测量了该试样在室温下的声速至13 GPa。对超声数据进行有限应变分析,得到体积和剪切模量及其压力导数KS0 = 145(1) GPa, K0′= 4.9(2),G0 = 92.3(3) GPa, G0′= 1.6(1),对应于室温下声速VP0 = 8.4(1) km/s, VS0 = 4.9(1) km/s。这些弹性数据与静态压缩实验和理论密度泛函计算得到的文献值进行了比较。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Synthesis and characterization of polycrystalline KAlSi3O8 hollandite [liebermannite]: Sound velocities vs. pressure to 13 GPa at room temperature

A polycrystalline specimen of liebermannite [KAlSi3O8 hollandite] was synthesized at 14.5 GPa and 1473 K using glass starting material in a uniaxial split-sphere apparatus. The recovered specimen is pure tetragonal hollandite [SG: I4/m] with bulk density of within 98% of the measured X-ray value. The specimen was also characterized by Raman spectroscopy and nuclear magnetic resonance spectroscopy. Sound velocities in this specimen were measured by ultrasonic interferometry to 13 GPa at room T in a uniaxial split-cylinder apparatus using Al2O3 as a pressure marker. Finite strain analysis of the ultrasonic data yielded KS0 = 145(1) GPa, K0 = 4.9(2), G0 = 92.3(3) GPa, G0 = 1.6(1) for the bulk and shear moduli and their pressure derivatives, corresponding to VP0 = 8.4(1) km/s, VS0 = 4.9(1) km/s for the sound wave velocities at room temperature. These elasticity data are compared to literature values obtained from static compression experiments and theoretical density functional calculations.

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来源期刊
Comptes Rendus Geoscience
Comptes Rendus Geoscience 地学-地球科学综合
CiteScore
2.80
自引率
14.30%
发文量
68
审稿时长
5.9 weeks
期刊介绍: Created in 1835 by physicist François Arago, then Permanent Secretary, the journal Comptes Rendus de l''Académie des sciences allows researchers to quickly make their work known to the international scientific community. It is divided into seven titles covering the range of scientific research fields: Mathematics, Mechanics, Chemistry, Biology, Geoscience, Physics and Palevol. Each series is led by an editor-in-chief assisted by an editorial committee. Submitted articles are reviewed by two scientists with recognized competence in the field concerned. They can be notes, announcing significant new results, as well as review articles, allowing for a fine-tuning, or even proceedings of symposia and other thematic issues, under the direction of invited editors, French or foreign.
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