A study of composition effects on the bandgaps in a series of new alkali metal aluminum/gallium iodates.

Four new alkali metal aluminum/gallium iodates, namely AM(IO)(HIO) (A = K, Rb and M = Al, Ga), have been successfully synthesized via a hydrothermal reaction and structurally characterized through single-crystal X-ray diffraction analysis. These compounds are isostructural and crystallize in the P1[combining macron] space group (no. 2) with one formula unit in each unit cell.