SrNdCr4O12 crystallizes in the orthorhombic Amm2 space group. Sr(1) is bonded to two equivalent O(2), two equivalent O(3), four equivalent O(1), and four equivalent O(4) atoms to form distorted SrO12 cuboctahedra that share corners with four equivalent Sr(1)O12 cuboctahedra and faces with eight equivalent Cr(1)O6 octahedra. Nd(1) is bonded in a 10-coordinate geometry to two equivalent O(2), two equivalent O(3), two equivalent O(5), and four equivalent O(1) atoms. Cr(1) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form CrO6 octahedra that share corners with six equivalent Cr(1)O6 octahedra and faces with two equivalent Sr(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 8-23°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Sr(1), one Nd(1), and two equivalent Cr(1) atoms. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Sr(1), one Nd(1), and two equivalent Cr(1) atoms. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Sr(1), one Nd(1), and two equivalent Cr(1) atoms. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Sr(1) and two equivalent Cr(1) atoms. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Nd(1) and two equivalent Cr(1) atoms.
SrNdCr4O12 crystallizes in the orthorhombic Amm2 space group. Sr(1) is bonded to two equivalent O(2), two equivalent O(3), four equivalent O(1), and four equivalent O(4) atoms to form distorted SrO12 cuboctahedra that share corners with four equivalent Sr(1)O12 cuboctahedra and faces with eight equivalent Cr(1)O6 octahedra. Both Sr(1)-O(2) bond lengths are 3.00 Å. Both Sr(1)-O(3) bond lengths are 2.75 Å. All Sr(1)-O(1) bond lengths are 2.60 Å. There are two shorter (2.57 Å) and two longer (2.86 Å) Sr(1)-O(4) bond lengths. Nd(1) is bonded in a 10-coordinate geometry to two equivalent O(2), two equivalent O(3), two equivalent O(5), and four equivalent O(1) atoms. Both Nd(1)-O(2) bond lengths are 2.50 Å. Both Nd(1)-O(3) bond lengths are 2.59 Å. Both Nd(1)-O(5) bond lengths are 2.40 Å. All Nd(1)-O(1) bond lengths are 2.69 Å. Cr(1) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form CrO6 octahedra that share corners with six equivalent Cr(1)O6 octahedra and faces with two equivalent Sr(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 8-23°. The Cr(1)-O(2) bond length is 1.89 Å. The Cr(1)-O(3) bond length is 1.91 Å. The Cr(1)-O(4) bond length is 1.87 Å. The Cr(1)-O(5) bond length is 1.88 Å. There is one shorter (1.77 Å) and one longer (2.15 Å) Cr(1)-O(1) bond length. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Sr(1), one Nd(1), and two equivalent Cr(1) atoms. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Sr(1), one Nd(1), and two equivalent Cr(1) atoms. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Sr(1), one Nd(1), and two equivalent Cr(1) atoms. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Sr(1) and two equivalent Cr(1) atoms. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Nd(1) and two equivalent Cr(1) atoms.