Microstrain in pyrope-grossular garnet solid solutions:structural implication

来源 :第26届国际高压科学技术大会、第8届亚洲高压科技学术会议暨第19届中国高压科学技术会议(The 26th Interna | 被引量 : 0次 | 上传用户：dsq90

【摘要】

：

Synchrotron X-ray diffraction(XRD)was used to measure the unit cell parameters of synthetic pyrope(Mg3Al2Si3O12),grossular(Ca3Al2Si3O12)and six intermediate garnet solid solutions.Garnets synthesized

【作者】

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Wei Du

【机构】

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School of Earth and Space Sciences,Peking University,10087,China;Department of Earth and Environment

【出处】

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第26届国际高压科学技术大会、第8届亚洲高压科技学术会议暨第19届中国高压科学技术会议(The 26th Interna

【发表日期】

：

2017年10期

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　　Synchrotron X-ray diffraction(XRD)was used to measure the unit cell parameters of synthetic pyrope(Mg3Al2Si3O12),grossular(Ca3Al2Si3O12)and six intermediate garnet solid solutions.Garnets synthesized dry in multi-anvil(MA)apparatus at 6 GPa show large irregular asymmetric positive quenchable excess volumes(Du et al.2016).Analysis of XRD profiles by using Williamson-Hall plots shows that microstrain,rather than grain size variation,is the principal reason for the observed XRD peak broadening.Garnets with compositions close to the negligibly strained end members have large microstrains but relatively small excess volume.

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