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10.6 Exercise 25

Avg difficulty 2.5

At temperatures above ~175 °C, thallium(I) iodide crystallizes with the same structure as CsCl. The edge length of the unit cell of TlI is 4.20 Å. Assuming contact between the body-centered Tl+ ion and the cube-corner I− ions of a unit cell, calculate the ionic radius of TI+. (The ionic radius of I− is 2.16 Å.)

OpenStax Chemistry 2e, 10.6 Lattice Structures in Crystalline Solids, exercise 25

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Adapted from General Chemistry © 2019 Rice University. Licensed under CC BY 4.0. Sources: Chemistry 2e, Chemistry: Atoms First 2e. Imported at revision 32c7196.