In Bismuth(III)iodide,iodide Ions Are Arranged in an Hcp Lattice

question 94

Multiple Choice

In bismuth(III) iodide,iodide ions are arranged in an hcp lattice.Assuming the ionic radii of bismuth and iodine in this compound are 117 and 206 pm,respectively,which of the following statements is correct?

• A)There are insufficient data to make any statements regarding the crystal structure.
• B)Two-thirds of the tetrahedral holes are filled by Bi³⁺ ions.
• C)One-third of the tetrahedral holes are occupied by Bi³⁺ ions.
• D)Two-thirds of the octahedral holes are filled by Bi³⁺ ions.
• E)One-third of the octahedral holes are filled by Bi³⁺ ions.

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