(00l) x-ray diffraction study of stage 1. cap alpha. and. beta. phases of graphite--CsBi/sub x/

Journal Article · Sat Nov 01 00:00:00 EST 1986 · J. Mat. Res.; (United States)

OSTI ID:7045476

Yang, M H; Eklund, P C

Results are reported of (00l) x-ray studies of the ..cap alpha..(I/sub c/ = 10.65 A) and ..beta..(I/sub c/ = 11.49 A) phases of stage 1 graphite--CsBi/sub x/ ternary intercalation compounds that are air stable. The integrated intensities of the (00l) x-ray lines are analyzed in terms of a centrosymmetric sandwich model that consists of two layers each of Cs, Bi, and C. The results of these analyses indicate that the Bi layers are nearly centered in the cell as suggested by Lagrange et al. (Synth. Met. 12, 201 (1985)). Furthermore, stoichiometries of the ..cap alpha.. and ..beta.. phases are found to be Cs/sub 0.99/Bi/sub 0.43/C/sub 4/ and Cs/sub 0.83/Bi/sub 0.81/C/sub 4/, respectively. The ..beta.. phase is found to contain nearly twice as many Bi atoms. The sample mass change upon intercalation is in good agreement with the x-ray analyses. The substantial difference in the Bi concentration in the ..cap alpha.. and ..beta.. phases would be expected to have strong influence on the superconducting properties of these graphite intercalation compounds (GIC's).

• Research Organization: Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506
• OSTI ID: 7045476
• Journal Information: J. Mat. Res.; (United States), Vol. 1:6
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH COMPOUNDS
CRYSTAL STRUCTURE
CESIUM COMPOUNDS
GRAPHITE
CLATHRATES
LAYERS
STOICHIOMETRY
SUPERCONDUCTIVITY
X-RAY DIFFRACTION
ALKALI METAL COMPOUNDS
CARBON
COHERENT SCATTERING
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTAL MINERALS
ELEMENTS
MINERALS
NONMETALS
PHYSICAL PROPERTIES
SCATTERING
360602* - Other Materials- Structure & Phase Studies