Binary inorganic compounds of rare-earth elements with intermediate valences

Journal Article · Fri Jul 01 04:00:00 EDT 1988 · Inorg. Mater. (Engl. Transl.); (United States)

OSTI ID:6337008

Eliseev, A A

In this review the evaluation of the valence state of ions of rare earth elements in binary inorganic compounds with group I-VII elements is given on the basis of the crystallochemical properties and analysis of the dependence of the size of the unit cells on the ionic radii of the trivalent rare-earth elements. We assume that the rare-earth elements to which the deviation in the linear trend of the dependence of the lattice periods from the ionic radius of Ln/sup 3 +/ corresponds exist in states with intermediate valence (IV). The ions of rare-earth elements in inorganic compounds display a completely definite deviation from the characteristic oxidation state 3+ (either 2+ or 4+). A regular deviation of the oxidation states (states with variable valence) of the ions of rare-earth elements in conformity with a periodic change in the structures of the electron shells of the atoms of rare-earth elements was established.

• Research Organization: M.V. Lomonosov Moscow Institute of Fine Chemical Technology (USSR)
• OSTI ID: 6337008
• Journal Information: Inorg. Mater. (Engl. Transl.); (United States), Journal Name: Inorg. Mater. (Engl. Transl.); (United States) Vol. 24:2; ISSN INOMA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
360602 -- Other Materials-- Structure & Phase Studies
360603 -- Materials-- Properties
BORIDES
BORON COMPOUNDS
CARBIDES
CARBON COMPOUNDS
CHALCOGENIDES
CHEMICAL COMPOSITION
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALLIZATION
CRYSTALLOGRAPHY
DOCUMENT TYPES
ELECTRICAL PROPERTIES
HALIDES
HALOGEN COMPOUNDS
HYDRIDES
HYDROGEN COMPOUNDS
LATTICE PARAMETERS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PNICTIDES
RARE EARTH COMPOUNDS
REVIEWS
SPACE GROUPS
SYNTHESIS
VALENCE