The mass spectra of alkali-halide cluster ions M(MX)ₙ⁺ and X(MX)ₙ^-, produced by laser vaporization of a solid sample, were measured by tilted-plate time-of-flight mass spectrometry. The measured abundances of sodium chloride clusters (n=1--200), sodium iodide clusters (n=1--125), cesium chloride clusters (n=1--125), and cesium iodide clusters (n=1--100) confirm that surface terraces are the most stable additions to a cuboid base lattice. Also, the spectra show that the relative stabilities of certain cluster ions are dependent on the ionic radii of the constituent atoms.
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Twu et al. (1990) studied this question.
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