Li sub 3 minus x Ti sub 2 (PO sub 4 ) sub 3 (O le x 1): A new mixed valent titanium(III/IV) phosphate with a NASICON-type structure

Journal Article · Fri Feb 01 04:00:00 EST 1991 · Journal of Solid State Chemistry; (USA)

DOI:https://doi.org/10.1016/0022-4596(91)90156-C· OSTI ID:5690746

Wang, Shumin; Hwu, Shioujyh ^[1]

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1. Rice Univ., Houston, TX (USA)

A new NASICON-related structure of lithium titanium phosphate Li{sub 2.72}Ti{sub 2}(PO{sub 4}){sub 3} has been determined. This compound crystallizes in an orthorhombic system, Pbcn, with a = 12.064 (3) {angstrom}, b = 8.663 (3) {angstrom}, c = 8.711 (4) {angstrom}, V = 910.4 (8) {angstrom}{sup 3}, and Z = 4. The single crystal structure of this novel mixed valent titanium(III/IV) phosphate reveals one titanium atom per asymmetric unit. Two lithium sites are characterized by a pair of distorted polyhedra, Li(1)O{sub 4} and Li(2)O{sub 5}, which share a common edge resulting in a short Li(1) . . . Li(2) distance, i.e., 2.29 (5) {angstrom}. Magnetic susceptibility and microprobe analysis confirmed the structural composition. The room temperature ionic conductivity is comparable with that of the known Li{sub 1+x}Ti{sub 2{minus}x}{sup IV}In{sub x}{sup III}(PO{sub 4}){sub 3}, which suggests possible fast ionic conductivity.

• OSTI ID: 5690746
• Journal Information: Journal of Solid State Chemistry; (USA), Journal Name: Journal of Solid State Chemistry; (USA) Vol. 90:2; ISSN JSSCB; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360603 -- Materials-- Properties
CHEMICAL ANALYSIS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DATA ANALYSIS
ELECTRON MICROPROBE ANALYSIS
LATTICE PARAMETERS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MICROANALYSIS
MONOCRYSTALS
NONDESTRUCTIVE ANALYSIS
ORTHORHOMBIC LATTICES
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PHYSICAL PROPERTIES
TITANIUM COMPOUNDS
TITANIUM PHOSPHATES
TRANSITION ELEMENT COMPOUNDS