Formation energy of alkali-metal-doped fullerite compounds A[sub 6]C[sub 60]

Journal Article · Thu Apr 01 04:00:00 EST 1993 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100115a004· OSTI ID:6049748

Chen, H S; Kortan, A R; Haddon, R C; Kopylov, N ^[1]

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1. AT T Bell Lab., Murray Hill, NJ (United States)

The formation energy, [Delta]H[sub f], of fullerite intercalation compounds A[sub n]C[sub 60] with A = Na, K, Rb, and Cs and n = 6 is measured using differential scanning calorimetry. The alkali metals, K, Rb, and Cs react with C[sub 60] powders readily and directly form the bcc A[sub 6]C[sub 60]. [Delta]H[sub f] values are found to be [minus]28, [minus]39, [minus]40, and [minus]47 kcal/mol per alkali metal for Na, K, Rb, and Cs, respectively. The activation energy of diffusion of the alkali metals Rb and Cs in the corresponding A[sub 6]C[sub 60] compound is evaluated to be approximately 30 kcal/mol. 25 refs., 4 figs., 1 tab.

• OSTI ID: 6049748
• Journal Information: Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 97:13; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360600* -- Other Materials
360607 -- Other Materials-- Superconducting Properties-- (1992-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALKALI METAL COMPOUNDS
CALORIMETRY
CARBON
CHEMICAL REACTIONS
CLATHRATES
CRYSTAL DOPING
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
ENERGY
FORMATION FREE ENERGY
FREE ENERGY
FULLERENES
MATERIALS
NONMETALS
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES