Recovery of Unquenchable High Pressure Phases by a Cryogenic Technique

建议的研究重点是恢复矿物物理学中长期感兴趣的几种不淬相。主要目标将是不淬灭的CaSiO3钙钛矿。低温x射线和光谱研究将在这一阶段进行，以确定其结构和动力学的细节。另一个目标合成将是SiO2方英石的高压单斜，用于x射线和中子衍射的结构溶解和细化。低温拉曼和x射线研究坏辉石相Ca(OH)2将进行。目标还包括不淬灭的FeTiO3钙钛矿和相关化合物，如MnTiO3钙钛矿和高压AlPO4。这里提出的研究是非破坏性的，因此样本也可用于进一步的工作。

9628678 Leinenweber The proposed research focuses on the recovery of several unquenchable phases which are of long-standing interest in mineral physics. A primary target will be unquenchable CaSiO3 perovskite. Low temperature x-ray and spectroscopic studies will be performed on this phase to determine details of its structure and dynamics. Another target synthesis will be of the high pressure monoclinic for of SiO2 cristobalite, for structure solution and refinement of x-ray and neutron diffraction. Low temperature Raman and x-ray studies of the baddeleyite phase Ca(OH)2 will be performed. Also targeted are unquenchable FeTiO3 perovskite and related compounds such as MnTiO3 perovskite, and high pressure AlPO4. The studies proposed here are non-destructive, so the sample will also be available for further work.