Science. 1987 Feb 6;235(4789):668-70. doi: 10.1126/science.235.4789.668.
Silicate perovskite of composition (Mg(0.88)Fe(0.12)) SiO(3) has been synthesized in a laser-heated diamond-anvil cell to a pressure of 127 gigapascals at temperatures exceeding 2000 K. The perovskite phase was identified and its unit-cell dimensions measured by in situ x-ray diffraction at elevated pressure and room temperature. An analysis of these data yields the first high-precision equation of state for this mineral, with values of the zero-pressure isothermal bulk modulus and its pressure derivative being K(0T) = 266 +/- 6 gigapascals and K'(0T) = 3.9 +/- 0.4. In addition, the orthorhombic distortion of the silicate-perovskite structure away from ideal cubic symmetry remains constant with pressure: the lattice parameter ratios are b/a = 1.032 +/- 0.002 and c/a = 1.444 +/- 0.006. These results, which prove that silicate perovskite is stable to ultrahigh pressures, demonstrate that perovskite can exist throughout the pressure range of the lower mantle and that it is therefore likely to be the most abundant mineral in Earth.
（Mg0.88Fe0.12）SiO3 的硅酸盐钙钛矿在激光加热的金刚石压腔中被合成到 127 吉帕斯卡的压力，温度超过 2000 K。钙钛矿相在高温高压下通过原位 x 射线衍射被识别出来，并测量了其单元晶格尺寸。对这些数据的分析给出了该矿物的第一个高精度的状态方程，零压等静压体弹性模量及其压力导数的值为 K0T = 266 ± 6 吉帕斯卡和 K'(0T) = 3.9 ± 0.4。此外，硅酸盐钙钛矿结构的正交畸变从理想的立方对称性保持不变：晶格参数比为 b/a = 1.032 ± 0.002 和 c/a = 1.444 ± 0.006。这些结果证明，硅酸盐钙钛矿在超高压下是稳定的，表明钙钛矿可以存在于下地幔的整个压力范围内，因此它很可能是地球上最丰富的矿物。
