The nonlinear elasticity and related properties of anhydrous and hydrous -Mg2SiO4:

详细信息    查看全文

• 作者：K. P. Jayachandran and Lin-gun Liu
• 关键词：Ringwoodite ; Hydrous minerals ; Nonlinear elasticity ; Higher order elastic constants ; Gr&uuml ; neisen parameters ; Anderson– ; Gr&uuml ; neisen parameter
• 刊名：Physics and Chemistry of Minerals
• 出版年：2005
• 出版时间：May 2005
• 年：2005
• 卷：32
• 期：1
• 页码：28-39
• 全文大小：414 KB
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Mineralogy
  Crystallography
  Geochemistry
  Mineral Resources
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1432-2021

文摘

The second-order elastic constants up to 30 GPa, which encompass the stability field of the spinel forms, their pressure derivatives and the third-order elastic constants of both hydrous and anhydrous [`(g)] (0)\bar \gamma (0)of both hydrous and anhydrous phases of -Mg₂SiO₄ are positive (1.69 and 1.78, respectively, for hydrous and anhydrous phases) and hence we expect the thermal expansion to be positive down to absolute zero. The Anderson–Grüneisen parameter obtained for hydrous as well as anhydrous phases of -Mg₂SiO₄ from the second-order and third-order elastic constants are 2.30 and 2.29, respectively.