Problem: CuI, CsI, and NaI each adopt a different type of structure. The three different structures are those shown in the following figure.Use ionic radii, Na+(r = 1.61 Å) and I–(r = 2.06 Å), to predict with which structure NaI will crystallize.

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CuI, CsI, and NaI each adopt a different type of structure. The three different structures are those shown in the following figure.

Use ionic radii, Na+(r = 1.61 Å) and I(r = 2.06 Å), to predict with which structure NaI will crystallize.

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