Hostname: page-component-586b7cd67f-2plfb Total loading time: 0 Render date: 2024-11-26T01:48:43.688Z Has data issue: false hasContentIssue false
  • English
  • Français

X-Ray Powder Diffraction Characterization of BaR2CuO5 (R=Yttrium and the Lanthanides) and Related Compounds

Published online by Cambridge University Press:  10 January 2013

W. Wong-Ng ,
M.A. Kuchinski ,
H.F. McMurdie  and
B. Paretzkin
W. Wong-Ng
Affiliation:
Ceramics Division, National Institute of Standards and Technology. Gaithersburg, Md. 20899.U.S.A.
M.A. Kuchinski
Affiliation:
Ceramics Division, National Institute of Standards and Technology. Gaithersburg, Md. 20899.U.S.A.
H.F. McMurdie
Affiliation:
Ceramics Division, National Institute of Standards and Technology. Gaithersburg, Md. 20899.U.S.A.
B. Paretzkin
Affiliation:
Ceramics Division, National Institute of Standards and Technology. Gaithersburg, Md. 20899.U.S.A.
Get access Rights & Permissions [Opens in a new window]

Abstract

A series of BaO:RxOy:CuO materials has been prepared where R=Y, La, Ce, Pr, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu. They have been characterized by X-ray powder diffraction methods. All BaR2CuO5 phases, commonly referred to as the “green phases”, are orthorhombic with space group Pbnm(62) and are isostructural. These single phase materials could be prepared with most lanthanides, except for La, Ce, Pr, Nd and Tb. Possible reasons for the exceptions are discussed. Both La and Nd tend to form a brown solid solution of Ba2+2xR4-2xCu2-xO10-2x with a tetragonal space group of P4/mbm(127). The major phases found in the Ce, Pr and Tb compositions are the perovskite-related structures BaRO3, and in the Pr case, Ba2PrCu3O6+x as well. The cell parameters of the green phase materials increase progressively from the Lu compound to the Sm compound: a ranges from 7.0506(6) to 7.2754(4) Å, b from 12. 0534(8) to 12. 4029(7) Å, c from 5.6099(5) to 5. 7602(3) Å, and the cell volume from 476.75(6) to 519.78(4) Å3. A correlation of the crystallographic data with the size of the R elements is given.

Type
Research Article
Information
Powder Diffraction , Volume 4 , Issue 1 , March 1989 , pp. 2 - 8
Copyright
Copyright © Cambridge University Press 1989

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Appleman, D.E. & Evans, H.T. Jr., (1973). Indexing and Least-Squares Refinement of Powder Diffraction Data. Report PB 216188. U.S. Dept. of Commerce, National Technical Information Service, 5285 Port Royal Rd. Springfield, VA 22151.Google Scholar
Frase, K.G. & Clarke, D.R. (1987). Phase Compatibilities in the System Y2O3-BaO-CuO. Adv. Ceram. Mater. 2(3B), 295.CrossRefGoogle Scholar
Hubbard, C.R. (1982). Standard Reference Material 675, Fluorophogopite-Low 2θ/Large D-spacing Powder Diffraction Standard. Obtainable from the National Institute of Standards and Technology, Office of Standard Reference Materials, Gaithersburg, MD 20899.Google Scholar
Hubbard, C.E., Robbins, C. and Wong-Ng, W. (1987). Standard Reference Material 640b, Silicon Powder X-ray Diffraction Standard. To obtain, see preceding reference.Google Scholar
Jacobson, A.J., Tofield, B.C. & Fender, B.E.F. (1972). The structures of BaCeO3, BaPrO3, and BaTbO3 by Neutron Diffraction: Lattice Parameter Relations and Ionic Radii in O-Perovskites. Acta Crystallogr. B28, 956.CrossRefGoogle Scholar
Kistenmacher, T.J. (1988). Effect of the Rare-Earth Ion on the Structure and Superconductivity in High-Tc RBa2Cu3Ov Ceramics, Solid State Commun. 65(9), 981.CrossRefGoogle Scholar
Klibanow, D., Sujata, K. & Mason, T.O. (1988). Solid Phase Relations at 950°C in La-Ba-Cu-O. J. Am. Ceram. Soc. 71(5), C–267.Google Scholar
Le Page, Y., Siegrist, T., Sunshine, S.A., Schneemeyer, L.T., Murphy, D.W., Zahurak, S.M., Waszczak, J.V., McKinnon, W.R., Tatascon, J.M., Hull, G.W. & Green, L.H. (1987). Structural Properties of Ba2RCu3O7 Superconductors. Phys. Rev. B36, 3617.CrossRefGoogle Scholar
McCarthy, G.C. (1978). Crystal Chemical Review of REMO3 Compounds (M=First Row Transition Metals.) In The Rare Earths in Modern Science and Technology, ed. McCarthy, G.J. and Rhyne, J.J., 189. New York: Plenum.CrossRefGoogle Scholar
McMurdie, H.F., Morris, M.C., Evans, E.H., Paretzkin, B., Wong-Ng, W. and Hubbard, C.R. (1986). Methods of Producing Standard X-ray Diffraction Powder Patterns. Pow. Diff. 1(1), 40.CrossRefGoogle Scholar
Michel, C., Er-Rakho, L. & Raveau, B. (1981). Oxides La4-2xBa2+2xCu2-xO10-2x: Structures Consisting of Planar CuO4 Groups. J. Solid State Chem. 39, 161.CrossRefGoogle Scholar
Michel, C., & Raveau, B. (1980). The Oxides A2BaCuO5 (A=Y, Sm, Eu, Gd, Ho, Er, Yb). J. Solid State Chem. 43. 73.CrossRefGoogle Scholar
Pyrros, N.P. & Hubbard, C.R. (1983). POWDER-PATTERN: A System of Programs for Processing and Interpreting Powder Diffraction Data. In Adv. X-Ray Anal. 26. 63. New York: Plenum.Google Scholar
Roth, R.S., Rawn, C.J., Beech, F., Whitler, J.D. & Anderson, J.D. (1988). Phase Equilibria in the System Ba-Y-Cu-O-Co2, in Air. Adv. Ceram. Mater. (In the press).Google Scholar
Shannon, R.D. (1976). Revised Effective Ionic Radii and Systemic Studies of Interatomic Distances in Halides and Chalcogenides. Acta Cryslallogr. A32, 751.CrossRefGoogle Scholar
Snyder, R.L., Hubbard, C.R. & Panagiotopoulos, N.C. (1981). AUTO: A Real Time Diffractometer Control System Report. NBSIR 81-2229. U.S. Dept. of Commerce, National Bureau of Standards, Gaithersburg, MD 20899.CrossRefGoogle Scholar
Tarascon, M.McKinnon, W.R., Greene, L.H., Hull, G.W. & Vogel, E.M. (1987). Oxygen and Rare-Earth Doping of the 90 K Superconducting Perovskite YBa2Cu3O7-x. Phys. Rev. B36, 226.CrossRefGoogle Scholar
Wang, G., Hwu, Z.J., Song, S.N., Ketterson, J.B., Marks, L.D., Poeppelmeier, K.R. & Mason, T.O. (1987). 950°C Subsolidus Phase Diagram for Y2O3-BaO-CuO System in Air. Adv. Ceram. Mater. 2 (3B), 313.CrossRefGoogle Scholar
Watkins, S.R., Fronczek, R.R., Wheelock, K.S., Goodrich, R.G., Hamilton, W.O. & Johnson, W.W. (1987). The Crystal Structure of Y2BaCuO5 (Submitted to Acta Crystallogrtaphica.)Google Scholar
Wong-Ng, W., Cook, L.P., Chiang, C.K., Swartzendruber, L. J. & Bennett, L. H. (1988). Structural Phase Transition Studies of High Tc Superconductor Materials, Ba2RCu3O6+x. Adv. Ceram. Mater. (In the press.)Google Scholar
Wong-Ng, W. & Hubbard, C.R. (1988). Standard Reference Materials for X-Ray Diffraction. Part II. Calibration Using D-spacing Standards. Pow. Diff. 2(3), 242.CrossRefGoogle Scholar