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Electric deflection experiments using a velocity selected molecular beam apparatus have given the following electric dipole moments [measured in μe (Debye)]: KI, 10.82 (10); RbBr, 10.86 (10); RbI, 11.48 (10); CsBr, 10.82 (10); CsI, 11.69 (10).
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Story et al. (1976) studied this question.
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