دورية أكاديمية
Microstrain in pyrope-grossular garnet solid solution at high pressure: a case study of Py(90)Gr(10) and Py(10)Gr(90) up to 15 GPa
| العنوان: | Microstrain in pyrope-grossular garnet solid solution at high pressure: a case study of Py(90)Gr(10) and Py(10)Gr(90) up to 15 GPa |
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| المؤلفون: | Du, Wei, Li, Xuefei, Li, Baosheng |
| المساهمون: | Du, W (reprint author), Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China., Du, W (reprint author), Columbia Univ City New York, Lamont Doherty Earth Observ, Palisades, NY 10964 USA., Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China., Columbia Univ City New York, Lamont Doherty Earth Observ, Palisades, NY 10964 USA., Jilin Normal Univ, Minist Educ, Key Lab Funct Mat Phys & Chem, Siping 136000, Peoples R China., SUNY Stony Brook, Mineral Phys Inst, Dept Geosci, Stony Brook, NY 11794 USA. |
| المصدر: | SCI |
| بيانات النشر: | PHYSICS AND CHEMISTRY OF MINERALS |
| سنة النشر: | 2017 |
| المجموعة: | Peking University Institutional Repository (PKU IR) / 北京大学机构知识库 |
| مصطلحات موضوعية: | Pyrope-grossular garnet solid solution, FWHM, Microstrain, Short-range ordering, Bulk modulus, THERMODYNAMIC-MIXING PROPERTIES, SINGLE-CRYSTAL ELASTICITY, X-RAY-DIFFRACTION, SI-29 MAS NMR, SYNTHETIC PYROPE, HYDROSTATIC COMPRESSION, ALMANDINE-PYROPE, ANDRADITE, MG3AL2SI3O12, SIMULATION |
| الوصف: | Single-phase, well-sintered, translucent polycrystalline garnets with compositions of Py(90)Gr(10) and Py(10)Gr(90) were synthesized at 6 GPa and 1400 degrees C using a multi-anvil apparatus. X-ray diffraction (XRD) data for these garnet solid solutions were collected with both high-resolution synchrotron X-ray and standard laboratory X-ray sources. Analysis of the FWHM of the XRD peaks using Williamson-Hall plot yields microstrains around 0.12% for Py(90)Gr(10) and 0.09% for Py(10)Gr(90). The FWHM of Py(10)Gr(90) garnet as well as the derived microstrain remains constant up to 11 GPa, followed by a continuous increase to the experimental peak pressure 15 GPa caused by elastic strain in response to deviatoric/anisotropic stresses. The FWHM and microstrain for Py(90)Gr(10) remain constant to the measurement limit at 7 GPa. The microstrain of pyrope-grossular garnets exhibits a nonlinear dependence on composition, showing two peaks near Py(20)Gr(80) and Py(80)Gr(20), which may be associated with local structural heterogeneities arising from Mg and Ca substitution. Using a third-order Birch-Murnaghan equation of state, the bulk modulus is constrained to be Ie (0) = 171.8 +/- 2.1 GPa (with K-0(') fixed to 5.92) for Py(10)Gr(90) and Ie (0) = 174.3 +/- 2.5 GPa (with K-0(') fixed to 4.4) for Py(90)Gr(10), both of which are much larger than that for intermediate composition close to Py(50)Gr(50) but comparable to that for their corresponding end members. The relatively larger microstrain and higher bulk moduli for Py(10)Gr(90) and Py(90)Gr(10) garnets could be related to short-range ordering of Mg and Ca cations in garnet structure due to substitution, which results in different local environments for Mg and Ca cations along the pyrope-grossular solid solution. ; DOE/NNSA [DE-NA0002907]; NSF [EAR1524078] ; SCI(E) ; ARTICLE ; 6 ; 377-388 ; 44 |
| نوع الوثيقة: | journal/newspaper |
| اللغة: | English |
| تدمد: | 0342-1791 1432-2021 |
| العلاقة: | PHYSICS AND CHEMISTRY OF MINERALS.2017,44(6),377-388.; 1907389; http://hdl.handle.net/20.500.11897/473173Test; WOS:000402238500001 |
| DOI: | 10.1007/s00269-016-0865-y |
| الإتاحة: | https://doi.org/20.500.11897/473173Test https://doi.org/10.1007/s00269-016-0865-yTest https://hdl.handle.net/20.500.11897/473173Test |
| رقم الانضمام: | edsbas.9B6E9E5F |
| قاعدة البيانات: | BASE |
| تدمد: | 03421791 14322021 |
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| DOI: | 10.1007/s00269-016-0865-y |