Gd2SiTeO4 crystallizes in the orthorhombic Pbcm space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 6-coordinate geometry to two equivalent Te(1), two equivalent O(2), and four equivalent O(1) atoms. In the second Gd site, Gd(2) is bonded in a 6-coordinate geometry to three equivalent Te(1), two equivalent O(1), and four equivalent O(2) atoms. Si(1) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. Te(1) is bonded in a 5-coordinate geometry to two equivalent Gd(1) and three equivalent Gd(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Gd(2), two equivalent Gd(1), and one Si(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Gd(1), two equivalent Gd(2), and one Si(1) atom.
Gd2SiTeO4 crystallizes in the orthorhombic Pbcm space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 6-coordinate geometry to two equivalent Te(1), two equivalent O(2), and four equivalent O(1) atoms. Both Gd(1)-Te(1) bond lengths are 3.27 Å. Both Gd(1)-O(2) bond lengths are 2.48 Å. There are two shorter (2.43 Å) and two longer (2.49 Å) Gd(1)-O(1) bond lengths. In the second Gd site, Gd(2) is bonded in a 6-coordinate geometry to three equivalent Te(1), two equivalent O(1), and four equivalent O(2) atoms. There are a spread of Gd(2)-Te(1) bond distances ranging from 3.12-3.36 Å. Both Gd(2)-O(1) bond lengths are 2.64 Å. There are two shorter (2.44 Å) and two longer (2.45 Å) Gd(2)-O(2) bond lengths. Si(1) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Si(1)-O(1) bond lengths are 1.64 Å. Both Si(1)-O(2) bond lengths are 1.67 Å. Te(1) is bonded in a 5-coordinate geometry to two equivalent Gd(1) and three equivalent Gd(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Gd(2), two equivalent Gd(1), and one Si(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Gd(1), two equivalent Gd(2), and one Si(1) atom.