X-ray powder diffraction of RE6UO12 (RE=Eu, Gd, and Dy)
- 1 December 2001
- journal article
- Published by Cambridge University Press (CUP) in Powder Diffraction
- Vol. 16 (4) , 220-223
- https://doi.org/10.1154/1.1383080
Abstract
Powder X-ray diffraction data are reported for RE6UO12 (RE=Eu, Gd, and Dy). The powders were prepared by a solution combustion method using urea as fuel. All compositions exhibit a rhombohedral structure with hexagonal unit cell parameters of a=1.012 67 (9) nm, c=0.9601 (1) nm for Eu6UO12; a=1.008 78 (6) nm, c=0.954 24 (7) nm for Gd6UO12; and a=0.998 06 (7) nm, c=0.944 03 (8) nm for Dy6UO12. The diffraction patterns of all the compounds are indexed on the R3¯ space group with Z=3. The a and c values decrease with increasing atomic number of the rare earth ion.Keywords
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