Equation of state of hydrous Fo90 ringwoodite to 45 GPa by synchrotron powder diffraction
Equation of state of hydrous Fo90 ringwoodite to 45 GPa by synchrotron powder diffraction
复制标题
通过同步加速器粉末衍射得到水合 Fo90 尖柱石到 45 GPa 的状态方程
DOI：
10.1180/0026461056930253
复制
发表时间：
2005
影响因子：
2.7
通讯作者：
D. Frost
中科院分区：
文献类型：
--
作者：
M. Manghnani;G. Amulele;J. Smyth;C. M. Holl;G. Chen;V. Prakapenka;D. Frost
在阿贡国家实验室的先进光子源同步加速器上，用X射线粉末衍射法在45 GPa下测量了Fo 90水合林伍德石的状态方程。样品在拜罗伊特的Bayerisches Geoinstitut的5000吨多砧压机中在1400°C和20 GPa下合成。经电子探针、傅里叶变换红外光谱和穆斯堡尔谱测定，其化学式为Mg_（1.70）Fe_（0.192）+Fe_（0.023）+H_（0.13）-Si_（1.00）O_4，含~0.79%的水。样品的压缩已经通过单晶X射线衍射测量到11 GPa。拟合所有数据的三阶Birch-Murnaghan状态方程给出V0 = 530.49±0.07 GPa，K 0 = 174.6±2.7 GPa和K ε = 6.2±0.6。在结构中掺入1%H对体积模量的影响很大，大致相当于在低压下温度升高约600°C。大的K值表明样品随压力的显著硬化，使得水合作用的效果随压力而降低。
Abstract The equation of state of Fo90 hydrous ringwoodite has been measured using X-ray powder diffraction to 45 GPa at the GSECARS beam line at the Advanced Photon Source synchrotron at Argonne National Laboratory. The sample was synthesized at 1400°C and 20 GPa in the 5000 ton multi anvil press at Bayerisches Geoinstitut in Bayreuth. The sample has the formula Mg1.70Fe0.192+Fe0.023+H0.13-Si1.00O4 as determined by electron microprobe, Fourier transform infrared and Mössbauer spectro-scopies, and contains ~0.79% H2O by weight. Compression of the sample had been been measured previously to 11 GPa by single crystal X-ray diffraction. A third-order Birch-Murnaghan equation of state fit to all of the data gives V0 = 530.49±0.07 Å3, K0 = 174.6±2.7 GPa and Kʹ = 6.2±0.6. The effect of 1% H incorporation in the structure on the bulk modulus is large and roughly equivalent to an increase in the temperature of ~600°C at low pressure. The large value of Kʹ indicates significant stiffening of the sample with pressure so that the effect of hydration decreases with pressure.
影响因子：
5.3
作者：
Inoue, T;Weidner, DJ;Parise, JB
通讯作者：
Parise, JB
影响因子：
5.3
作者：
Schmidt, MW;Poli, S
通讯作者：
Poli, S