Magnetic susceptibilities of Mg sub y U sub 1 minus y O sub 2+x solid solutions

Journal Article · Sun Dec 01 04:00:00 EST 1991 · Journal of Solid State Chemistry; (United States)

DOI:https://doi.org/10.1016/0022-4596(91)90125-2· OSTI ID:7293695

Hinatsu, Yukio ^[1]

---

1. Japan Atomic Energy Research Inst., Tokaimura (Japan)

Solid solutions Mg{sub y}U{sub 1{minus}y}O{sub 2+x} with fluorite structure were prepared and their magnetic susceptibilities were measured from 4.2 K to room temperature. An antiferromagnetic transition was observed for the solid solutions examined in this study. Both the Neel temperature and the effective magnetic moment of uranium decreased with increasing magnesium concentration. The change in the magnetic properties of these solid solutions with x and y values was compared with that of M{sub y}U{sub 1{minus}y}O{sub 2+x} solid solutions where M = Ca{sup 2+}, Y{sup 3+}, La{sup 3+}, or Th{sup 4+}. The substitution of Mg{sup 2+} for U{sup 4+} was found to oxidize uranium ions to the +5 state but not the +6 state. The variation of the effective magnetic moment of uranium against mean uranium valency is quite similar to that for the solid solutions with M = Ca{sup 2+}, Y{sup 3+}, or La{sup 3+}.

• OSTI ID: 7293695
• Journal Information: Journal of Solid State Chemistry; (United States), Journal Name: Journal of Solid State Chemistry; (United States) Vol. 95:2; ISSN 0022-4596; ISSN JSSCB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ACTINIDE COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ANTIFERROMAGNETISM
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
DISPERSIONS
EXPERIMENTAL DATA
INFORMATION
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MAGNETISM
MIXTURES
NEEL TEMPERATURE
NUMERICAL DATA
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SOLID SOLUTIONS
SOLUTIONS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
URANIUM COMPOUNDS
URANIUM OXIDES
VALENCE