| 作者简介 | 第1-10页 |
| ABSTRACT | 第10-13页 |
| 摘要 | 第13-15页 |
| Contents | 第15-17页 |
| Chapter 1.Introduction | 第17-32页 |
| ·High-pressure and High-temperature (HPHT) experimental methods for Earth science | 第17-20页 |
| ·Multi-anvil Apparatus (MAA) and HPHT experimental method | 第20-25页 |
| ·MAA | 第20-21页 |
| ·Types of MAA | 第21-25页 |
| ·M_2SiO_4 group members and Zn_2SiO_4 | 第25-27页 |
| ·M_2SiO_4 group members | 第25页 |
| ·Z_2SiO_4 | 第25-27页 |
| ·The research status of high pressure Zn_2SiO_4 | 第27-29页 |
| ·Target, content, methods and significance of this research | 第29-30页 |
| ·Working capacity for the thesis | 第30-31页 |
| Table | 第31-32页 |
| Chapter 2. Synthesis of high pressure and high temperature Zn_2SiO_4 polymorphs | 第32-41页 |
| ·Synthesis of starting materials | 第32-33页 |
| ·High pressure high temperature experimental synthesis for high pressure polymorphs of Z_2SiO_4 | 第33-41页 |
| ·Preparation for starting materials for Zn_2SiO_4 polymorphs synthesis | 第36-37页 |
| ·Preparation for anvils for high-pressure and high-temperature experiments | 第37-41页 |
| Chapter 3. Experimental methods | 第41-54页 |
| ·Electron microprobe analysis (EMPA) | 第41-43页 |
| ·Introduction | 第41-42页 |
| ·Selection of standards | 第42页 |
| ·Conditions for EMPA analyzing | 第42-43页 |
| ·Nuclear magnetic resonance (NMR) spectroscopy | 第43-49页 |
| ·Magic angle spectroscopy NMR | 第43-46页 |
| ·~(29)Si NMR spectroscopy | 第46-47页 |
| ·Conditions for ~(29)Si MAS NMR analyzing | 第47-49页 |
| ·Powder X-ray diffraction and structural analysis | 第49-52页 |
| ·Synchrotron X-ray diffraction | 第49-50页 |
| ·Conditions of conventional X-ray and synchrotron X-ray | 第50-52页 |
| ·Micro-Raman scattering spectroscopy | 第52-54页 |
| ·Interaction with light: Raman spectroscopy | 第52页 |
| ·Conditions for Micro-Raman analyzing | 第52-54页 |
| Chapter 4. Characterization of Zn_2SiO_4 polymorphs | 第54-66页 |
| ·Chemical compositions of Zn_2SiO_4 polymorphs | 第54-59页 |
| ·~(29)Si MAS NMR spectra of Zn_2SiO_4 polymorphs | 第59-61页 |
| ·Powder X-ray diffraction patterns and structural analysis | 第61-63页 |
| ·Micro-Raman spectroscopy of Zn_2SiO_4 polymorphs | 第63-66页 |
| Chapter S. Solving the crystal structure of phase Ⅲ and Ⅳ | 第66-94页 |
| ·Structure determination from powder diffraction (SDPD) method | 第66-68页 |
| ·A useful computer program FOX for SDPD | 第68-70页 |
| ·Crystal structure refinement for phase Ⅲ and Ⅳ | 第70-94页 |
| ·Read powder diffraction data from text file | 第70-75页 |
| ·Indexing by TREOR90 | 第75-76页 |
| ·Space group estimation (by Le Bail fitting in FOX and NMR information and also by distinction rule from indexing results) | 第76-83页 |
| ·Refinement of crystal structures of phase Ⅲ and Ⅳ by RIETAN-FP computer program | 第83-94页 |
| Chapter 6. Crystal structures of phase Ⅲ and Ⅳ | 第94-110页 |
| ·The results of refinement from RIETAN-FP program | 第94-98页 |
| ·The obtained crystal structures of two high pressure Zn_2SiO_4 polymorphs | 第98-110页 |
| ·The detailed information of crystal structure of phase Ⅲ | 第100-104页 |
| ·The detailed information of crystal structure of phase Ⅳ | 第104-110页 |
| Chapter 7. Discussion | 第110-118页 |
| ·Comparison of Zn_2SiO_4 and M_2SiO_4 | 第110-111页 |
| ·The phase transformation of Zn_2SiO_4 polymorphs (from phase Ⅰ to Ⅳ) | 第111-116页 |
| ·Phase Ⅰ | 第111-113页 |
| ·Phase Ⅱ | 第113-114页 |
| ·Phase 'transformation' from phase Ⅰ to Ⅳ | 第114-115页 |
| ·Comparison of Zn_2SiO_4 and Zn_2GeO_4 | 第115-116页 |
| ·Comparison of Zn_2SiO_4 and A_2BX_4 type inorganic compounds | 第116-118页 |
| Chapter 8. Conclusion | 第118-122页 |
| ·Conclusion for this study | 第118-120页 |
| ·Innovation | 第120-121页 |
| ·Prospects | 第121-122页 |
| ·Some unknown phases for investigation | 第121页 |
| ·Utilization of solid-state NMR for experimental mineralogy | 第121-122页 |
| Appendix | 第122-132页 |
| Acknowledgements | 第132-133页 |
| References | 第133-140页 |
