Crystal structures of Ga(II) and Ga(III)

The crystal structures of the high pressure Ga(II) and Ga(III) forms of gallium were studied by single-crystal x-ray diffraction using a diamond anvil device. Ga(II) has a body-centered-cubic structure with a=5.951±0.005 Å and 12 atoms in the centered cell; Ga(III) has a body-centered-tetragonal cell with a=2.813±0.003 Å, c=4.452±0.005 Å, and two atoms (this phase was previously labeled as Ga(II) in works cited in the text).