Synthesis and characterization of reduced niobates (Sr[sub 1[minus]x]Ln[sub x]Nb[sub 2]O[sub 6], Ln = La, Nd)

Journal Article · Fri Jul 01 04:00:00 EDT 1994 · Materials Research Bulletin; (United States)

DOI:https://doi.org/10.1016/0025-5408(94)90199-6· OSTI ID:7277527

Istomin, S Y; D'yachenko, O G.D.; Antipov, E V ^[1]; Svensson, G; Nygren, M ^[2]

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1. Moscow State Univ., Moscow (Russian Federation). Dept. of Chemistry
2. Stockholm Univ., Stockholm (Sweden). Dept. of Inorganic Chemistry

Sr[sub 1-x]Ln[sub x]Nb[sub 2]O[sub 6], Ln = La (x [le] 0.4), Nd (x [le] 0.3) solid solutions with a CaTa[sub 2]O[sub 6]-type structure have been studied. No superconductivity was found in the prepared samples down to 5K. The CaTa[sub 2]O[sub 6] type crystal structure of Sr[sub 0.6]La[sub 0.4]Nb[sub 2]O[sub 6] was refined from X-ray powder diffraction data: R[sub i] = 0.054, R[sub p] = 0.117. The oxidation process of the lanthanum-containing compounds was studied. A drastic decrease of the lanthanum content, accompanied by the formation of the cation vacancies at the Sr/La site occurs during oxidation. Electrical and magnetic properties were studied.

• OSTI ID: 7277527
• Journal Information: Materials Research Bulletin; (United States), Journal Name: Materials Research Bulletin; (United States) Vol. 29:7; ISSN MRBUAC; ISSN 0025-5408
• 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
360205 -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
NIOBIUM COMPOUNDS
NIOBIUM OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
TRANSITION ELEMENT COMPOUNDS