Materials Data on Bi2I2O by Materials Project
Bi2OI2 crystallizes in the tetragonal P4/mmm space group. The structure is two-dimensional and consists of one Bi2OI2 sheet oriented in the (0, 0, 1) direction. Bi2+ is bonded in a single-bond geometry to one O2- and one I1- atom. The Bi–O bond length is 2.08 Å. The Bi–I bond length is 3.45 Å. O2- is bonded in a linear geometry to two equivalent Bi2+ atoms. I1- is bonded to one Bi2+ and four equivalent I1- atoms to form a mixture of distorted edge and corner-sharing IBiI4 square pyramids. All I–I bond lengths are 3.33 Å.
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