Volume properties and compressibility of the graphite-potassium-mercury compounds

Autor:	I. A. Udod, K. N. Semeneko, Vera A. Nalimova, V. V. Avdeev
Rok vydání:	1992
Předmět:	chemistry Potassium Intercalation (chemistry) Compressibility Intermetallic Analytical chemistry Mineralogy chemistry.chemical_element Graphite Condensed Matter Physics Ternary operation Mercury (element)
Zdroj:	High Pressure Research. 8:557-565
ISSN:	1477-2299 0895-7959
DOI:	10.1080/08957959208203217
Popis:	The volume properties of graphite intercalation compounds (GIGS) C4KHg and of the initial intermetallic compounds KHg and KHg2 have been investigated in the piston-cylinder apparatus, using the direct volumetric technique, under pressures up to 25 kbar. The compounds, average compressibility K+, was determined to be 3.8×10−3 kbar−1 for C4KHg, 3.0×10−3 kbar-−1 for C8KHg, 4.8×10−1 kbar−1 for KHg, and 4.0 ×10−1 kbar−1 for KHg2 at pressures of 0-20 kbar. The compressibility of the “two-dimensional” KHg layer in the GIC under various pressure conditions has been estimated. These estimates permit comparison of KHg properties in the “three dimensional” and “quasi-two dimensional” states. It was concluded that the influence of the graphite matrix on the intercalant is insignificant for this type ternary GIC.
Databáze:	OpenAIRE
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