[a] Indium exhibits a body-centered-tetragonal structure with each indium atom having 4 neighbors at 3.25 Å and 8 neighbors at 3.38 Å. Gallium adopts an orthorhombic structure with each Ga atom having one neighbor at 2.47 Å, 2 at 2.70 Å, 2 at 2.73 Å and 2 at 2.79 Å. The weighted average distances are ~3.3 Å for In and ~2.7 Å for Ga. The structures of indium and gallium are discussed in J. Donohoe, The Structure of the Elements (Robert E. Krieger Publishing Company, Malabar, Florida,1982). [reference in text]
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