Powder X-Ray Reference Patterns of Sr2RGaCu2Oy(R=Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, and Y)

Published

August 1, 2001

Author(s)

Winnie K. Wong-Ng, James A. Kaduk, Igor Levin, W Greenwood, J Dillingham

Abstract

X-ray Rietveld refinements were conducted on a series of 11 lanthanide phases, SR₂RGaCu₂O₇ (R=Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, and Y) that are structurally related to the High T_c superconductor Ba₂YCu₃O₇. Reference patterns for these compounds were prepared by using the Rietveld decomposition technique. The unit cell volumes of these compounds in general show the expected trend parallel to that of lanthanide contraction. These lattice parameters range from a = 22.8059(2) , b = 5.46031(5) and c = 5.37773(5) for R = Yb, to 23.129(1) , b = 5.587(2) and c = 5.4596(3) for R = La.

Citation

Journal of Research (NIST JRES) -

Volume

106 No. 4

NIST Pub Series

Journal of Research (NIST JRES)

Pub Type

NIST Pubs

Keywords

Rietveld refinements, Sr₂RGaCu₂O₇, superconductor related phases, x-ray powder patterns

Citation

Wong-Ng, W. , A., J. , Levin, I. , Greenwood, W. and Dillingham, J. (2001), Powder X-Ray Reference Patterns of Sr₂RGaCu₂O_y(R=Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, and Y), Journal of Research (NIST JRES), National Institute of Standards and Technology, Gaithersburg, MD (Accessed October 12, 2025)