1986 年 55 巻 10 号 p. 3428-3436
The distribution of the Voronoi polyhedron is calculated with the use of the molecular dynamics method for the system of 864 argon atoms in the raidly quenched state near the liquid helium temperature and also in the F.C.C. crystalline states at elevated temperatures. The topological characteristics of the polyhedra in the rapidly quenched state of argon is found very similar to those calculated for rapidly quenched rubidium consistent to the similarity found in the pair and the triplet distribution functions between two systems. The Voronoi polyhedron in the F.C.C. crystalline states concentrates in a few special types of the face-indices and retains somewhat cubic symmetries naturally. The polyhedron network in a rapidly quenched monatomic system is shown different topologically from that in a hot crystal.
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