In2O3 is Stibnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent In sites. In the first In site, In(1) is bonded to two equivalent O(1), two equivalent O(3), and three equivalent O(2) atoms to form a mixture of distorted edge, face, and corner-sharing InO7 pentagonal bipyramids. In the second In site, In(2) is bonded to two equivalent O(1), two equivalent O(2), and three equivalent O(3) atoms to form a mixture of distorted edge and corner-sharing InO7 pentagonal bipyramids. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent In(1) and two equivalent In(2) atoms to form OIn4 trigonal pyramids that share corners with four equivalent O(2)In5 square pyramids, corners with seven equivalent O(3)In5 trigonal bipyramids, corners with four equivalent O(1)In4 trigonal pyramids, edges with three equivalent O(2)In5 square pyramids, and  a faceface with one O(3)In5 trigonal bipyramid. In the second O site, O(2) is bonded to two equivalent In(2) and three equivalent In(1) atoms to form OIn5 square pyramids that share corners with eight equivalent O(3)In5 trigonal bipyramids, corners with four equivalent O(1)In4 trigonal pyramids, edges with four equivalent O(2)In5 square pyramids, edges with two equivalent O(3)In5 trigonal bipyramids, and edges with three equivalent O(1)In4 trigonal pyramids. In the third O site, O(3) is bonded to two equivalent In(1) and three equivalent In(2) atoms to form distorted OIn5 trigonal bipyramids that share corners with eight equivalent O(2)In5 square pyramids, corners with seven equivalent O(1)In4 trigonal pyramids, edges with two equivalent O(2)In5 square pyramids, edges with four equivalent O(3)In5 trigonal bipyramids, and  a faceface with one O(1)In4 trigonal pyramid.
In2O3 is Stibnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent In sites. In the first In site, In(1) is bonded to two equivalent O(1), two equivalent O(3), and three equivalent O(2) atoms to form a mixture of distorted edge, face, and corner-sharing InO7 pentagonal bipyramids. Both In(1)-O(1) bond lengths are 2.20 Å. Both In(1)-O(3) bond lengths are 2.44 Å. There is one shorter (2.28 Å) and two longer (2.32 Å) In(1)-O(2) bond lengths. In the second In site, In(2) is bonded to two equivalent O(1), two equivalent O(2), and three equivalent O(3) atoms to form a mixture of distorted edge and corner-sharing InO7 pentagonal bipyramids. There is one shorter (2.29 Å) and one longer (2.31 Å) In(2)-O(1) bond length. Both In(2)-O(2) bond lengths are 2.32 Å. There are two shorter (2.20 Å) and one longer (2.38 Å) In(2)-O(3) bond length. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent In(1) and two equivalent In(2) atoms to form OIn4 trigonal pyramids that share corners with four equivalent O(2)In5 square pyramids, corners with seven equivalent O(3)In5 trigonal bipyramids, corners with four equivalent O(1)In4 trigonal pyramids, edges with three equivalent O(2)In5 square pyramids, and  a faceface with one O(3)In5 trigonal bipyramid. In the second O site, O(2) is bonded to two equivalent In(2) and three equivalent In(1) atoms to form OIn5 square pyramids that share corners with eight equivalent O(3)In5 trigonal bipyramids, corners with four equivalent O(1)In4 trigonal pyramids, edges with four equivalent O(2)In5 square pyramids, edges with two equivalent O(3)In5 trigonal bipyramids, and edges with three equivalent O(1)In4 trigonal pyramids. In the third O site, O(3) is bonded to two equivalent In(1) and three equivalent In(2) atoms to form distorted OIn5 trigonal bipyramids that share corners with eight equivalent O(2)In5 square pyramids, corners with seven equivalent O(1)In4 trigonal pyramids, edges with two equivalent O(2)In5 square pyramids, edges with four equivalent O(3)In5 trigonal bipyramids, and  a faceface with one O(1)In4 trigonal pyramid.