Journal
POWDER DIFFRACTION
Volume 31, Issue 2, Pages 110-117Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0885715616000051
Keywords
powder X-ray diffraction; crystal structure; infrared absorption spectra; thermal stability; rare earth borates
Funding
- National Natural Science Foundation of China [51472273]
- Major State Basic Research Development Program [2014CB6644002]
- Department for Science and Technology of Hunan Province [2014FJ4099]
- Project of Innovation-driven Plan in Central South University [2015CX004]
Ask authors/readers for more resources
Subsolidus phase equilibrium of Na2O-Sm2O3-B2O3 system has been investigated mainly by solid-state reaction and powder X-ray diffraction method. There are nine definite three-phase regions and three ternary compounds determined under present experimental conditions. A novel compound Na3SmB2O6 was found and confirmed in this system, along with its two homogeneous compounds Na3REB2O6 (RE = Pr, Eu) synthesized for the first time. The indexing results showed that all three compounds crystallize in the monoclinic space group P2(1)/c (No. 14) with the same structure type as both Na3NdB2O6 and Na3GdB2O6. The lattice parameters (a, b, and c) of new borates Na3REB2O6 (RE = Pr, Sm, Eu) decrease linearly with a decreasing radius of RE ion, which obeys the Lanthanide-contraction rule. The existence of a trigonal BO3 group in the Na3REB2O6 (RE = Pr, Sm) compounds was confirmed by analysis of their infrared absorption spectra. Thermal stabilities of the three new borates have been investigated. (C) 2016 International Centre for Diffraction Data.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available
Share Paper
