Bi2SiO5 crystallizes in the orthorhombic Cmc2_1 space group. Si(1) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form corner-sharing SiO4 tetrahedra. Bi(1) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Bi(1) atoms to form a mixture of edge and corner-sharing OBi4 tetrahedra. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Si(1) and two equivalent Bi(1) atoms. In the third O site, O(3) is bonded in a linear geometry to two equivalent Si(1) atoms.
Bi2SiO5 crystallizes in the orthorhombic Cmc2_1 space group. Si(1) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form corner-sharing SiO4 tetrahedra. Both Si(1)-O(2) bond lengths are 1.61 Å. There is one shorter (1.65 Å) and one longer (1.67 Å) Si(1)-O(3) bond length. Bi(1) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. There is one shorter (2.47 Å) and one longer (2.53 Å) Bi(1)-O(2) bond length. There are a spread of Bi(1)-O(1) bond distances ranging from 2.18-2.50 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Bi(1) atoms to form a mixture of edge and corner-sharing OBi4 tetrahedra. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Si(1) and two equivalent Bi(1) atoms. In the third O site, O(3) is bonded in a linear geometry to two equivalent Si(1) atoms.