Neutron scattering study of the solid electrolyte: RbAg/sub 4/I/sub 5/

Conference · Sat Jan 01 04:00:00 EST 1977

OSTI ID:5280877

Shapiro, S M; Semmingsen, D; Salamon, M

Neutron scattering experiments were performed on RbAg/sub 4/I/sub 5/ in order to probe: (1) The lattice dynamics above and below the phase transition at T/sub 2/ = 208.5 K; (2) The temperature dependence of the Ag/sup +/ occupancies below T/sub 2/; and (3) The diffusion of the Ag/sup +/ ions. No anomalous softening of the elastic constant C/sub 44/ was observed as had been reported by ultrasonic studies. Careful examination of the phonon intensities above and below T/sub 2/ suggest that the transition is discontinuous. The behavior of allowed reflections below T/sub 2/ mirror the temperature dependence of the Ag/sup +/ occupation factors. A broad overdamped excitation is observed throughout Q-space and becomes a propagating mode as the temperature is decreased. Nothing critical happens at T/sub 2/ or T/sub 1/.

• Research Organization: Brookhaven National Lab., Upton, N.Y. (USA); Illinois Univ., Urbana (USA)
• DOE Contract Number: EY-76-C-02-0016
• OSTI ID: 5280877
• Report Number(s): BNL-23210; CONF-770913-2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
ALKALI METAL COMPOUNDS
COHERENT SCATTERING
CRYSTAL-PHASE TRANSFORMATIONS
DIFFRACTION
ELASTICITY
ELECTROLYTES
HALIDES
HALOGEN COMPOUNDS
IODIDES
IODINE COMPOUNDS
LATTICE VIBRATIONS
LOW TEMPERATURE
MECHANICAL PROPERTIES
NEUTRON DIFFRACTION
PHASE TRANSFORMATIONS
RUBIDIUM COMPOUNDS
RUBIDIUM IODIDES
SCATTERING
SILVER COMPOUNDS
SILVER IODIDES
TENSILE PROPERTIES
TRANSITION ELEMENT COMPOUNDS