α-ScOOH的P-V-T状态方程。

IF 1.2 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

High Pressure Research Pub Date : 2022-04-03 DOI:10.1080/08957959.2022.2089568

Yoshiaki Ito, O. Ikeda, T. Sakamaki, T. Kuribayashi, A. Suzuki

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引用次数: 0

摘要

摘要在本研究中，在高达4.12的压力和温度下，对具有一水硬铝石型结构的氢氧化钪α-ScOOH进行了原位X射线衍射研究 GPa和700 K、以确定压力-体积-温度（P-V-T）状态方程（EoS）。使用二阶Birch–Murnaghan EoS对P-V-T数据的最小二乘拟合，确定α-ScOOH的EoS参数为体积模量KT 0 = 101（1）GPa = −0.009（5）GPa K−1，零压力下的热膨胀系数α = 3.12（6）10−5 K−1。α-ScOOH表现出各向异性的压缩和热膨胀行为，这与先前对一水硬铝石型氢氧化物的研究一致。α-ScOOH比其他一水硬铝石型氢氧化物更具压缩性，并且体积模量和体积的乘积在M3一水硬硬铝石类型中近似恒定 + 哦（M = Al、Sc和Fe）。

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P-V-T equation of state of α-ScOOH.

ABSTRACT In this study, an in situ X-ray diffraction study of α-ScOOH, scandium oxyhydroxide with a diaspore-type structure, was conducted at a pressure and temperature of up to 4.12 GPa and 700 K, respectively, to determine the pressure-volume-temperature (P-V-T) equation of state (EoS). Using a least-squares fit of the second-order Birch–Murnaghan EoS to the P-V-T data, the EoS parameters of α-ScOOH were determined as bulk modulus KT 0 = 101(1) GPa, (∂KT /∂T) P = −0.009(5) GPa K−1, and thermal expansion coefficient at zero pressure α = 3.12(6) 10−5 K−1. α-ScOOH exhibits anisotropic compression and thermal expansion behaviors, which are consistent with those of previous studies on diaspore-type oxyhydroxides. α-ScOOH is more compressible than other diaspore-type oxyhydroxides, and the product of the bulk modulus and volume is approximately constant among diaspore-type M3 + OOH (M = Al, Sc, and Fe).

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来源期刊

High Pressure Research 物理-物理：综合

CiteScore

3.80

自引率

5.00%

发文量

审稿时长

2 months

期刊介绍： High Pressure Research is the leading journal for research in high pressure science and technology. The journal publishes original full-length papers and short research reports of new developments, as well as timely review articles. It provides an important forum for the presentation of experimental and theoretical advances in high pressure science in subjects such as: condensed matter physics and chemistry geophysics and planetary physics synthesis of new materials chemical kinetics under high pressure industrial applications shockwaves in condensed matter instrumentation and techniques the application of pressure to food / biomaterials Theoretical papers of exceptionally high quality are also accepted.