Composition, lattice parameters, and room temperature elastic constants of natural single crystal xenotime from Novo Horizonte期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Composition, lattice parameters, and room temperature elastic constants of natural single crystal xenotime from Novo Horizonte

Authors:

P. Mogilevsky E. B. Zaretsky T. A. Parthasarathy F. Meisenkothen

Affiliation:

(1) UES Inc., 4401 Dayton-Xenia Rd., Dayton, OH 45432, USA;(2) Department of Mechanical Engineering, Ben Gurion University of the Negev, Beer-Sheva, 84105, Israel

Abstract:

The composition, lattice parameters, and elastic constants of natural single crystal YPO₄ xenotime from Novo Horizonte (Brazil) were determined using EPMA, XRD, and the pulse-echo technique. The composition indicates a 24% substitution of Y sites with other rare-earth elements. The lattice parameters of the studied crystal deviated only slightly from those reported for synthetic YPO₄ and were in a good agreement with trends obeyed by other orthophosphates with the xenotime structure. The measured elastic constants C ₁₁, C ₃₃, C ₄₄, and C ₆₆ were consistent with synthetic crystals when porosity was accounted for. C ₁₂ and C ₁₃ constants were evaluated based on the comparison with other materials with xenotime structure. The elastic constants could be rationalized using interionic force constants and bond energies.

P. MogilevskyEmail:

Keywords:

Elastic constants Composition Lattice parameters Fiber reinforced CMCs

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