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The Crystal Structure of BaY2O4, Isotypic with SrY2O4

Published online by Cambridge University Press:  10 January 2013

G.A. Costa ,
M. Ferretti ,
M.L. Fornasini ,
E.A. Franceschi  and
G.L. Olcese
G.A. Costa
Affiliation:
Istituto di Chimica Fisica, Corso Europa 26, 16132 Genova, Italia.
M. Ferretti
Affiliation:
Istituto di Chimica Fisica, Corso Europa 26, 16132 Genova, Italia.
M.L. Fornasini
Affiliation:
Istituto di Chimica Fisica, Corso Europa 26, 16132 Genova, Italia.
E.A. Franceschi
Affiliation:
Istituto di Chimica Fisica, Corso Europa 26, 16132 Genova, Italia.
G.L. Olcese
Affiliation:
Istituto di Chimica Fisica, Corso Europa 26, 16132 Genova, Italia.
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Abstract

Since the discovery of the superconductivity in Ba2YCu3 O7-x, the system Ba-Y-Cu-O has generated vast interest. The presence and the properties of the intermediate phases were examined, and the existence of the BaY2O4 phase was confirmed.

We have determined the crystal structure of this material from powder data; it is orthorhombic, Pnma (no 62) with a = 10.394(3) Å, b = 3.450(1) Å, c = 12.113(4) Å, isotypic with SrY2O4 (CaFe2O4-type). The observed and calculated intensity values are reported together with the powder diffraction data, obtained both by Guinier and diffractometer methods.

Type
Research Article
Information
Powder Diffraction , Volume 4 , Issue 1 , March 1989 , pp. 24 - 25
Copyright
Copyright © Cambridge University Press 1989

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References

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