Garnets in the majorite-pyrope system: symmetry, lattice microstrain,   and order-disorder of cations

doi:10.1007/s00269-016-0852-3

CORC > 北京大学 > 地球与空间科学学院

	Garnets in the majorite-pyrope system: symmetry, lattice microstrain, and order-disorder of cations
	Liu, Zhaodong ; Du, Wei ; Shinmei, Toru ; Greaux, Steeve ; Zhou, Chunyin ; Arimoto, Takeshi ; Kunimoto, Takehiro ; Irifune, Tetsuo
刊名	PHYSICS AND CHEMISTRY OF MINERALS
	2017
关键词	Garnet Phase transition Microstrain Cation disorder Cation substitution SOLID-SOLUTIONS RAMAN-SPECTROSCOPY SILICATE GARNETS PHASE-TRANSITION GPA MG3AL2SI3O12 ELASTICITY JOIN ZONE
DOI	10.1007/s00269-016-0852-3
英文摘要	We present a systematic experimental study on the phase transition, lattice microstrain, and order-disorder of cations for garnets in the majorite-pyrope system. Polycrystalline gem-quality garnets were synthesized at high pressure and high temperature using a Kawai-type multi-anvil apparatus. A phase transition from a cubic to tetragonal structure is clearly observed for garnets with the majorite content of more than 74 mol % through X-ray diffraction (XRD) and Raman scattering studies. Microstrain of garnets, evaluated with the Williamson-Hall plot on XRD profiles, shows a nonlinear dependence of the garnet compositions. The variation of the XRD peak broadening suggests the lattice microstrain of these garnets may be associated with the local structural heterogeneities due to the substitution of different cations via the coupled substitution (Mg2+ + Si4+ = 2Al(3+)) in the garnet structure. The width variation of Raman scattering peaks indicates that cation disorder occurs in the garnet structure for intermediate compositions. It is found that intermediate garnets and end-members have a minimum of microstrain, while those between end-members and intermediate compositions possess a larger microstrain.; JSPS [25220712]; SCI(E); ARTICLE; 4; 237-245; 44
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/474381]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Liu, Zhaodong,Du, Wei,Shinmei, Toru,et al. Garnets in the majorite-pyrope system: symmetry, lattice microstrain, and order-disorder of cations[J]. PHYSICS AND CHEMISTRY OF MINERALS,2017.
APA	Liu, Zhaodong.,Du, Wei.,Shinmei, Toru.,Greaux, Steeve.,Zhou, Chunyin.,...&Irifune, Tetsuo.(2017).Garnets in the majorite-pyrope system: symmetry, lattice microstrain, and order-disorder of cations.PHYSICS AND CHEMISTRY OF MINERALS.
MLA	Liu, Zhaodong,et al."Garnets in the majorite-pyrope system: symmetry, lattice microstrain, and order-disorder of cations".PHYSICS AND CHEMISTRY OF MINERALS (2017).