Chemistry

Problem

A hypothetical ionic solid contains

\text{X}^+

ions of radius

90\,\text{pm}

and

\text{Y}^-

ions of radius

200\,\text{pm}

. Based on this size ratio, which nearest-neighbor arrangement around an

\text{X}^+

ion is most likely to be favored? a) Cubic coordination by 8

\text{Y}^-

ions b) Octahedral coordination by 6

\text{Y}^-

ions c) Linear coordination by 2

\text{Y}^-

ions d) Tetrahedral coordination by 4

\text{Y}^-

ions