In BismuthIII) Iodide, Iodide Ions Are Arranged in an Hcp

question 168

Multiple Choice

In bismuthIII) 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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