The Ternary System Eu

Journal Article · Mon Jan 01 04:00:00 EST 2001 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1006/jssc.2000.8997· OSTI ID:784359

Han, C Q; Chen, X L; Liang, J K; Liu, Q L; Rao, G H

The subsolidus phase relations of the Eu{sub 2}O{sub 3}-SrO-CuO ternary system have been investigated by X-ray powder diffraction. All samples were synthesized in air at 950-1000 C. The system can be divided into nine three-phase regions and four two-phase regions. In this system, there exist two solid solutions, Sr{sub 14-x}Eu{sub x}Cu{sub 24}O{sub y} and Eu{sub 1+x}Sr{sub 2-x}Cu{sub 2}O{sub y}, and one ternary compound, Eu{sub 0.8}Sr{sub 1.2}CuO{sub 3.4}. The solid solution Sr{sub 14-x}Eu{sub x}Cu{sub 24}O{sub y} (0{le}x{le}6) crystallizes in an orthorhombic unit cell with space group Fmmm and lattice constants of a=3.950-3.981 {angstrom}, b=11.475-11.298 {angstrom}, and c=13.401-12.827 {angstrom}. The solid solution Eu{sub 1+x}Sr{sub 2-x}Cu{sub 2}O{sub y} (0{le}x{le}0.4) belongs to an orthorhombic system with space group Immm and cell parameters a=3.761-3.775 {angstrom}, b=11.385-11.252 {angstrom}, and c=20.019- 20.069 {angstrom}. The ternary compound Eu{sub 0.8}Sr{sub 1.2}CuO{sub 3.4} crystallizes in an orthorhombic unit cell with space group Immm and lattice constants of a=3.713 {angstrom}, b=3.787 {angstrom}, and c=12.636 {angstrom}. A comparison of the Eu system with reported systems of La, Nd, Ho, and Y indicate that the phase diagrams become complicated with an increase in the lanthanide ion size.

• Research Organization: Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Science, Beijing (CN); International Center for Materials Physics, Chinese Academy of Sciences, Shengyang (CN)
• Sponsoring Organization: National Natural Science Foundation of China; State Key Project on Fundamental Research in China (US)
• OSTI ID: 784359
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 1 Vol. 156; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AIR
CHEMICAL PREPARATION
COPPER OXIDES
DIFFRACTION
EUROPIUM OXIDES
EXPERIMENTAL DATA
LATTICE PARAMETERS
ORTHORHOMBIC LATTICES
OXIDES
PHASE DIAGRAMS
PHASE STUDIES
RARE EARTHS
SOLID SOLUTIONS
SPACE GROUPS
STRONTIUM OXIDES
TEMPERATURE RANGE 1000-4000 K
X-RAY DIFFRACTION