HNbO/sub 3/ and HTaO/sub 3/: new cubic perovskites prepared from LiNbO/sub 3/ and LiTaO/sub 3/ via ion exchange

Journal Article · Mon Mar 01 00:00:00 EST 1982 · J. Solid State Chem.; (United States)

DOI:https://doi.org/10.1016/0022-4596(82)90150-5· OSTI ID:5262422

Rice, C E; Jackel, J L

The synthesis of HNbO/sub 3/ and HTaO/sub 3/ from LiNbO/sub 3/ via ion exchange in hot aqueous acid solutions is reported. This reaction is accompanied by a topotactic structural transformation from the rhombohedral LiNbO/sub 3/ structure to the cubic perovskite structure; cell constants are a = 3.822(1) angstrom for HNbO/sub 3/ and 3.810(2) angstrom for HTaO/sub 3/. These new compounds have been characterized by powder X-ray diffraction, thermogravimetric analysis, and solid-state NMR. They are electronic insulators and have low ionic conductivity. Evidence of partially proton-exchange phases Li/sub 1-x/H/sub x/MO/sub 3/ was also seen. The possible significance of this ion exchange reaction for devices using LiNbO/sub 3/ or LiTaO/sub 3/ is discussed.

• Research Organization: Bell Labs., Holmdel, NJ
• OSTI ID: 5262422
• Journal Information: J. Solid State Chem.; (United States), Vol. 41:3
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
HYDROGEN COMPOUNDS
CHEMICAL PREPARATION
ION EXCHANGE
LITHIUM COMPOUNDS
NIOBATES
PEROVSKITES
TANTALATES
CUBIC LATTICES
EXPERIMENTAL DATA
GRAPHS
HIGH TEMPERATURE
NIOBIUM OXIDES
STEREOCHEMISTRY
TANTALUM OXIDES
TRANSFORMATIONS
TRIGONAL LATTICES
VOLUMETRIC ANALYSIS
X-RAY DIFFRACTION
ALKALI METAL COMPOUNDS
CHALCOGENIDES
CHEMICAL ANALYSIS
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DATA
DIFFRACTION
INFORMATION
NIOBIUM COMPOUNDS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
SCATTERING
SYNTHESIS
TANTALUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
400200* - Inorganic
Organic
& Physical Chemistry
400201 - Chemical & Physicochemical Properties