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Crystal Structures and Reference Diffraction Patterns of BaSrR4O8



Winnie K. Wong-Ng, James A. Kaduk, J Dillingham


The structure of BaSrR4O8 (where R = La, Nd, Sm, Gd, Eu, Dy, Ho, Y, Er, Tm, Yb, and Lu) has been investigated, and the X-ray reference patterns of these compounds have been prepared using the Rietveld refinement technique. BaSrR2O4 are isostructural to BaR2O4, which have the perovskite-related CaFe2O4 structure type (orthorhombic, Pnam). The cell parameters of these compounds ( R = Lu to La) range from 10.12504(10) to 10.5501(8) for a, 3.36249(3) to 3.69204(24) for b, 11.84691(13) to 12.5663(9) for c, and 403.33 to 489.47 3 for V, respectively. There is a linear relationship between V and the Shannon ionic radius of R. Unlike the BaR2O4 compositions ( R = Tm, Lu and Yb), which produced a mixture of Ba3R4O9 and unreacted lanthanide oxides, single-phase BaSrTm4O8, BaSrLu4O8 and BaSrYb4O8 were successfully prepared.
Powder Diffraction
No. 3


BaSrR<sub>4</sub>O<sub>8</sub>, crystal structure, reference x-ray patterns, superconductor related


Wong-Ng, W. , A., J. and Dillingham, J. (2002), Crystal Structures and Reference Diffraction Patterns of BaSrR<sub>4</sub>O<sub>8</sub>, Powder Diffraction (Accessed March 2, 2024)
Created September 1, 2002, Updated February 19, 2017