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Atomic Coordination Valency of the Elements
Author(s) -
Plendl J. N.,
Gielisse P. J.
Publication year - 1972
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220530207
Subject(s) - valency , atomic number , coordination number , valence (chemistry) , chemistry , atomic theory , atomic radius , crystallography , atomic physics , thermodynamics , physics , quantum mechanics , ion , electron , philosophy , linguistics
The atomic coordination valency, Z a , recently derived from an atomistic formulation of compressibility, and a newly developed atomic parameter, Z a /( n — 1), are investigated as a function of the atomic numbers. Here: Z a = ϱ z , where z is the valence of the atoms in the elemental state, ϱ the ratio of the atomic coordination numbers of two successive polymorphs, and n the principal quantum number. The values of Z a differentiate between the three fundamental states of solids: reduced, basic, and elevated. The parameter Z a /( n — 1) represents an atomic determinant of bond strength. The three fundamental states of solids resolve the Periodic Table into a series of characteristic blocks of elements which manifest a distinct ordering, based on three categories of bond strength. Some new polymorphic forms may be predicted by this concept. An application to thermal expansion of metallic elements is given.