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Phase equilibria in systems involving the rare earth oxides. Part III. The Eu2O3-In2O3 system

Journal Article · · Journal of Research of the National Bureau of Standards, Section A: Physics and Chemistry

The equilibrium phase diagram was determined for the Eu/sub 2/0/sub 3/- In/sub 2/0/sub 3/ system. An induction furnace, having an iridium crucible as the heating element (suspector), was used to establish the solidus and liquidus curves. The 1: 1 composition melts congruently at 1745 plus or minus 10 deg C. Melting point relations suggest that the 1: 1 composition is a compound with solid solution extending both to 31 mole% In/sub 2/0/sub 3/ and 71 mole % In/sub 2/0/sub 3/. The compound is pseudohexagonal with alpha = 3 69. A and c/sub H/ = 12.38 A. Isostructural phases also occur in the 1: 1 mixtures of both Gd/sub 2/ O/sub 3/ and Dy/sub 2/0/sub 3/ with In/sub 2/0/sub 3/. The melting points of Eu/ sub 2/O/sub 3/ and In/sub 2/0/sub 3/ were determined to be 2240 plus or minus 10 plus or minus C and 1910 plus or minus 10 deg C, respectively. A eutectic occurs in the Eu/sub 2/O/sub 3/-In/sub 2/O/sub 3/ system at 1730 deg C and about 73 mole % In/sub 2/0/sub 3/. The indicated uncertainties in the melting points are conservative estimates of the over-all inaccuracies of temperature measurement.

Research Organization:
Originating Research Org. not identified
Sponsoring Organization:
USDOE
NSA Number:
NSA-15-032569
OSTI ID:
4837521
Journal Information:
Journal of Research of the National Bureau of Standards, Section A: Physics and Chemistry, Journal Name: Journal of Research of the National Bureau of Standards, Section A: Physics and Chemistry Journal Issue: 5 Vol. 65A; ISSN 0022-4332
Country of Publication:
Country unknown/Code not available
Language:
English

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Related Subjects

COMPOUNDS
CONFIGURATION
CRUCIBLES
DIAGRAMS
DYSPROSIUM OXIDES
ELEMENTS
EQUATIONS
EUROPIUM OXIDES
EUTECTICS
FURNACES
GADOLINIUM OXIDES
HEATING
HIGH TEMPERATURE
INDIUM OXIDES
INDUCTION
IRIDIUM
LATTICES
LIQUIDS
MEASURED VALUES
MELTING POINTS
METALS, CERAMICS, AND OTHER MATERIALS
PHASE DIAGRAMS
REACTION KINETICS
SOLID SOLUTIONS
SOLIDS
TEMPERATURE