Fast-ion transport in the NASICON analog Na/sub 3/Sc/sub 2/(PO/sub 4/)/sub 3/: structure and conductivity

Conference · Thu Mar 31 23:00:00 EST 1983

OSTI ID:6099174

Susman, S; Delbecq, C J; Brun, T O; Prince, E

The room temperature modification of stoichiometric NASICON(Sc) is monoclinic Cc. At 64/sup 0/C there is a first order transition to a normal-conducting rhombohedral form R anti 3c. Na(1) sites are fully occupied whereas Na(2) sites are partially occupied. At 167/sup 0/C there is a transition to a superionic phase, but the structure remains rhombohedral R anti 3c. Vacancies are now shared equally by Na(1) and Na(2) sites. Fast Na-ion motion in stoichiometric Na/sub 3/Sc/sub 2/(PO/sub 4/)/sub 3/ arises from vacancy motion in a dogleg path between Na(1) and Na(2) sites.

• Research Organization: Argonne National Lab., IL (USA); National Measurement Lab. (NBS), Washington, DC (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6099174
• Report Number(s): CONF-830708-2; ON: DE83014284
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
ALKALI METAL COMPOUNDS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
IONIC CONDUCTIVITY
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PHYSICAL PROPERTIES
POINT DEFECTS
SCANDIUM COMPOUNDS
SCANDIUM PHOSPHATES
SODIUM COMPOUNDS
SODIUM PHOSPHATES
TRANSITION ELEMENT COMPOUNDS
VACANCIES