Correlations are developed between the microscopic parameters, Debye-Waller factor and lattice constant and the macroscopic properties, melting temperature and hardness of alkali halide crystals with NaCl structure. Proper equations are proposed and physical justification is provided for the observed correlations. Further, these properties are correlated with the force constant calculated from the compressibility and these correlations are, again, shown to have physical justification. Finally, a kaleidoscopic relationship is shown to exist between all these properties. (C) 2003 Kluwer Academic Publishers. [References: 15]
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