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Title: Phase relations in the composition (Pb sub 1-y Cu sub y )Sr sub 2 (Ln sub 1-x Ca sub x )Cu sub 2 O sub 7 and the crystal structure of La sub 8-x Sr sub x Cu sub 8-y O sub 20

Abstract

The compound (Pb{sub 0.71}Cu{sub 0.29})Sr{sub 2}(Ln{sub 1-x}Ca{sub x})Cu{sub 2}O{sub 7} (1212) has been synthesized as single phase material for La, Pr, Nd, Gd, Er, and Y from the proper starting compositions fired above 950{degree}C. The crystal structure of a crystal found in a reaction product from a nominal mixture PbSr{sub 2}LaCu{sub 2} (1212) fired at 1050{degree}C was determined from three-dimensional X-ray diffraction data, Its composition is (La{sub 6.16}Sr{sub 1.84})Cu{sub 7.66}O{sub 20}, M{sub r} = 1823.6, tetragonal, P4/mbm, a = 10.7468(8) {angstrom}, c = 3.8633(3) {angstrom}, V = 446.2(1) {angstrom}{sup 3}, Z = 1, D{sub x} = 6.79 g cm{sup {minus}3}, {lambda} = 0.71069 {angstrom}, {mu} = 288.0 cm{sup {minus}1}, R = 0.032, wR = 0.034 for 385 observed reflections. The two apical Cu1-O bond lengths are 1.9317(1) {angstrom}, and the four equatorial lengths are 1.978(7) {angstrom}. The square Cu2-O bond lengths are 1.9317(1) and 1.869(6) {angstrom} respectively.

Authors:
; ; ;  [1]
  1. Univ. of Texas, Austin (USA)
Publication Date:
OSTI Identifier:
7198403
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry; (USA)
Additional Journal Information:
Journal Volume: 84:2; Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COPPER OXIDES; CRYSTAL STRUCTURE; STRONTIUM COMPOUNDS; CALCULATION METHODS; DATA ANALYSIS; ERBIUM; EXPERIMENTAL DATA; GADOLINITE; GADOLINIUM; LANTHANUM; MEASURING INSTRUMENTS; MEASURING METHODS; NEODYMIUM; PHASE STUDIES; PRASEODYMIUM; YTTRIUM; ALKALINE EARTH METAL COMPOUNDS; BERYLLIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; DATA; ELEMENTS; INFORMATION; IRON COMPOUNDS; METALS; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; RARE EARTH COMPOUNDS; RARE EARTHS; SILICATES; SILICON COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS; 360201* - Ceramics, Cermets, & Refractories- Preparation & Fabrication; 360202 - Ceramics, Cermets, & Refractories- Structure & Phase Studies

Citation Formats

Lee, J Y, Kim, J S, Swinnea, J S, and Steinfink, H. Phase relations in the composition (Pb sub 1-y Cu sub y )Sr sub 2 (Ln sub 1-x Ca sub x )Cu sub 2 O sub 7 and the crystal structure of La sub 8-x Sr sub x Cu sub 8-y O sub 20. United States: N. p., 1990. Web. doi:10.1016/0022-4596(90)90331-Q.
Lee, J Y, Kim, J S, Swinnea, J S, & Steinfink, H. Phase relations in the composition (Pb sub 1-y Cu sub y )Sr sub 2 (Ln sub 1-x Ca sub x )Cu sub 2 O sub 7 and the crystal structure of La sub 8-x Sr sub x Cu sub 8-y O sub 20. United States. https://doi.org/10.1016/0022-4596(90)90331-Q
Lee, J Y, Kim, J S, Swinnea, J S, and Steinfink, H. Thu . "Phase relations in the composition (Pb sub 1-y Cu sub y )Sr sub 2 (Ln sub 1-x Ca sub x )Cu sub 2 O sub 7 and the crystal structure of La sub 8-x Sr sub x Cu sub 8-y O sub 20". United States. https://doi.org/10.1016/0022-4596(90)90331-Q.
@article{osti_7198403,
title = {Phase relations in the composition (Pb sub 1-y Cu sub y )Sr sub 2 (Ln sub 1-x Ca sub x )Cu sub 2 O sub 7 and the crystal structure of La sub 8-x Sr sub x Cu sub 8-y O sub 20},
author = {Lee, J Y and Kim, J S and Swinnea, J S and Steinfink, H},
abstractNote = {The compound (Pb{sub 0.71}Cu{sub 0.29})Sr{sub 2}(Ln{sub 1-x}Ca{sub x})Cu{sub 2}O{sub 7} (1212) has been synthesized as single phase material for La, Pr, Nd, Gd, Er, and Y from the proper starting compositions fired above 950{degree}C. The crystal structure of a crystal found in a reaction product from a nominal mixture PbSr{sub 2}LaCu{sub 2} (1212) fired at 1050{degree}C was determined from three-dimensional X-ray diffraction data, Its composition is (La{sub 6.16}Sr{sub 1.84})Cu{sub 7.66}O{sub 20}, M{sub r} = 1823.6, tetragonal, P4/mbm, a = 10.7468(8) {angstrom}, c = 3.8633(3) {angstrom}, V = 446.2(1) {angstrom}{sup 3}, Z = 1, D{sub x} = 6.79 g cm{sup {minus}3}, {lambda} = 0.71069 {angstrom}, {mu} = 288.0 cm{sup {minus}1}, R = 0.032, wR = 0.034 for 385 observed reflections. The two apical Cu1-O bond lengths are 1.9317(1) {angstrom}, and the four equatorial lengths are 1.978(7) {angstrom}. The square Cu2-O bond lengths are 1.9317(1) and 1.869(6) {angstrom} respectively.},
doi = {10.1016/0022-4596(90)90331-Q},
url = {https://www.osti.gov/biblio/7198403}, journal = {Journal of Solid State Chemistry; (USA)},
issn = {0022-4596},
number = ,
volume = 84:2,
place = {United States},
year = {1990},
month = {2}
}