Abstract

Through controlled thermal decomposition of cobalt acetate tetrahydrate, cobalt monoxide can be synthesized with three different crystal structures: rock salt, zinc blende, and wurtzite. Using electron microscopy techniques, it is shown that the polymorphs exhibit characteristic crystallite morphologies; “tetrahedral” for the zinc blende type and “lathlike” for the wurtzite form. Atomistic simulation calculations predict the lattice energies of the three polymorphs to be relatively close, with the rock salt polymorph being most stable, followed by the wurtzite form and lastly zinc blende.

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