Change of Chemical Bond Character under Pressure

6 Change of Chemical Bond Character under Pressure 

However, difficulties of measurements of e, n and under Mgh pressures, increasing 

The behavior of metals under pressure is remarkable. At ambient conditions, the metal atoms are ionized (by releasing itinerant electrons), but only partly so. Under compression the rest of the outer-shell electrons are squeezed out , and the degree of ionization of atoms increases. Ultimately, the atomic cores become cations and the crystal structure of a metal will correspond to a close-packing of cations. Stabilization of such a system requires very high pressures, to counterbalance the repulsion of cations. The parameters of such ultimate states have been calculated [517], see Table S2.22. The intemuclear distances are expected to equal the sums of cationic radii. 

Experimental data from the Handbook of Chemistry and Physics, 88th edn (2007-2008) are presented without reference, otherwise the references to original papers are given. 

Structure type Structure type kyl Structure type  

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