P-V-T equation of state of Ca3Cr2Si3O12 uvarovite garnet by using a diamond-anvil cell and in-situ synchrotron X-ray diffraction
P-V-T equation of state of Ca3Cr2Si3O12 uvarovite garnet by using a diamond-anvil cell and in-situ synchrotron X-ray diffraction
复制标题
使用金刚石砧池和原位同步加速器 X 射线衍射得到 Ca3Cr2Si3O12 钙铬榴石石榴石的 P-V-T 状态方程
DOI：
10.2138/am-2015-5002
复制
发表时间：
2015-02
影响因子：
3.1
通讯作者：
Hongsen Xie
中科院分区：
文献类型：
--
作者：
Dawei Fan;Jingui Xu;Maining Ma;Shuyi Wei;Bo Zhang;Jing Liu;Hongsen Xie
采用角色散X射线衍射和金刚石压砧装置，在900 K和16.20 GPa的高温下，测量了合成钙铬榴石的压力-体积-温度（P-V-T）状态方程。对三阶Birch-Murnaghan EoS的室温P-V数据的分析得到：V0 = 1736.9 ± 0.5 μ 3，K 0 = 162 ± 2 GPa，K′0 = 4.5 ± 0.3。当K′0固定为4.0时，得到V0 = 1736.5 ± 0.3GPa，K 0 = 164 ± 1GPa。用高温三阶Birch-Murnaghan状态方程拟合PV- T数据，得到热弹性参数：V_0 = 1736.8 ± 0.8 × 10 ~（-3），K_0 = 162 ± 3 GPa，K′_0 = 4.3 ± 0.4，（K_K/T）P = -0.021 ± 0.004 GPa/K，α_0 =（2.72 ± 0.14）×10 ~（-5）K ~（-1）。我们比较了我们的弹性参数的结果，从以前的研究钙铬榴石。通过对这些拟合结果的比较，我们建议将钙铬榴石的体积模量及其压力导数限制在K 0 = 162 GPa和K′0 = 4.0-4.5。并与其他钙榴石石榴石、钙铝榴石和钙铁榴石的研究结果进行了比较，表明钙铝榴石的压缩机制与钙铝榴石和钙铁榴石相似。在此基础上，建立了K_0（GPa）= 398.1（7）-0.136（8）V_0（GPa ~ 3）的系统关系，相关系数R_2 = 0.9999。结合这些结果与以往的研究pyralspite石榴石镁铝榴石，铁铝榴石，spessartine的组成依赖的热弹性参数（体积模量，热膨胀，体积模量的温度导数）进行了讨论。
Abstract The pressure-volume-temperature (P-V-T) equation of state (EoS) of synthetic uvarovite has been measured at high temperatures up to 900 K and high pressures up to 16.20 GPa, by using in situ angle-dispersive X-ray diffraction and diamond-anvil cell. Analysis of room-temperature P-V data to a third-order Birch-Murnaghan EoS yielded: V0 = 1736.9 ± 0.5 Å3, K0 = 162 ± 2 GPa, and K′0 = 4.5 ± 0.3. With K′0 fixed to 4.0, we obtained: V0 = 1736.5 ± 0.3 Å3 and K0 = 164 ± 1 GPa. Fitting of our PV- T data by means of the high-temperature third-order Birch-Murnaghan equations of state, given the thermoelastic parameters: V0 = 1736.8 ± 0.8 Å3, K0 = 162 ± 3 GPa, K′0 = 4.3 ± 0.4, (∂K/∂T)P = -0.021 ± 0.004 GPa/K, and α0 = (2.72 ± 0.14)×10-5 K-1. We compared our elastic parameters to the results from the previous studies for uvarovite. From the comparison of these fittings, we propose to constrain the bulk modulus and its pressure derivative to K0 = 162 GPa and K′0 = 4.0-4.5 for uvarovite. Present results were also compared with previous studies for other ugrandite garnets, grossular and andradite, which indicated that the compression mechanism of uvarovite might be similar with grossular and andradite. Furthermore, a systematic relationship, K0 (GPa) = 398.1(7)-0.136(8) V0 (Å3) with a correlation coefficient R2 of 0.9999, has been established based on these isostructural analogs. Combining these results with previous studies for pyralspite garnets-pyrope, almandine, and spessartine-the compositional dependence of the thermoelastic parameters (bulk modulus, thermal expansion, and the temperature derivative of the bulk modulus) were discussed.
登录
查看更多内容
影响因子：
3.2
作者：
K. Zhuravlev;A. Goncharov;S. Tkachev;P. Dera;V. Prakapenka
通讯作者：
K. Zhuravlev;A. Goncharov;S. Tkachev;P. Dera;V. Prakapenka
影响因子：
3.1
作者：
M. Wildner;M. Andrut
通讯作者：
M. Wildner;M. Andrut
影响因子：
1.4
作者：
Jianzhong Zhang
通讯作者：
Jianzhong Zhang
影响因子：
2.3
作者：
F. Guyot;Yanbin Wang;P. Gillet;Y. Ricard
通讯作者：
F. Guyot;Yanbin Wang;P. Gillet;Y. Ricard
影响因子：
1.4
作者：
Li Zhang;H. Ahsbahs;Ali Kutoglu;C. Geiger
通讯作者：
Li Zhang;H. Ahsbahs;Ali Kutoglu;C. Geiger