Sr2La2CrNiO8 is (La,Ba)CuO4-derived structured and crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one O(3), two equivalent O(4), two equivalent O(5), and four equivalent O(1) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one O(5), two equivalent O(2), two equivalent O(3), and four equivalent O(1) atoms. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to one O(2), two equivalent O(4), two equivalent O(5), and four equivalent O(1) atoms. In the second La site, La(2) is bonded in a 9-coordinate geometry to one O(4), two equivalent O(2), two equivalent O(3), and four equivalent O(1) atoms. Cr(1) is bonded to one O(3), one O(4), and four equivalent O(1) atoms to form CrO6 octahedra that share corners with four equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles are 1°. Ni(1) is bonded to one O(2), one O(5), and four equivalent O(1) atoms to form NiO6 octahedra that share corners with four equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles are 1°. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), one Sr(2), one La(1), one La(2), one Cr(1), and one Ni(1) atom to form distorted OSr2La2CrNi octahedra that share corners with two equivalent O(1)Sr2La2CrNi octahedra, corners with three equivalent O(4)Sr2La3Cr octahedra, corners with three equivalent O(2)Sr2La3Ni octahedra, corners with three equivalent O(3)Sr3La2Cr octahedra, corners with three equivalent O(5)Sr3La2Ni octahedra, edges with two equivalent O(1)Sr2La2CrNi octahedra,  a faceface with one O(4)Sr2La3Cr octahedra,  a faceface with one O(2)Sr2La3Ni octahedra,  a faceface with one O(3)Sr3La2Cr octahedra,  a faceface with one O(5)Sr3La2Ni octahedra, and faces with four equivalent O(1)Sr2La2CrNi octahedra. The corner-sharing octahedral tilt angles range from 0-56°. In the second O site, O(2) is bonded to two equivalent Sr(2), one La(1), two equivalent La(2), and one Ni(1) atom to form distorted OSr2La3Ni octahedra that share  a cornercorner with one O(5)Sr3La2Ni octahedra, corners with four equivalent O(2)Sr2La3Ni octahedra, corners with twelve equivalent O(1)Sr2La2CrNi octahedra, edges with two equivalent O(4)Sr2La3Cr octahedra, edges with two equivalent O(5)Sr3La2Ni octahedra, edges with four equivalent O(3)Sr3La2Cr octahedra, and faces with four equivalent O(1)Sr2La2CrNi octahedra. The corner-sharing octahedral tilt angles range from 0-52°. In the third O site, O(3) is bonded to one Sr(1), two equivalent Sr(2), two equivalent La(2), and one Cr(1) atom to form distorted OSr3La2Cr octahedra that share  a cornercorner with one O(4)Sr2La3Cr octahedra, corners with four equivalent O(3)Sr3La2Cr octahedra, corners with twelve equivalent O(1)Sr2La2CrNi octahedra, edges with two equivalent O(4)Sr2La3Cr octahedra, edges with two equivalent O(5)Sr3La2Ni octahedra, edges with four equivalent O(2)Sr2La3Ni octahedra, and faces with four equivalent O(1)Sr2La2CrNi octahedra. The corner-sharing octahedral tilt angles range from 0-56°. In the fourth O site, O(4) is bonded to two equivalent Sr(1), one La(2), two equivalent La(1), and one Cr(1) atom to form distorted OSr2La3Cr octahedra that share  a cornercorner with one O(3)Sr3La2Cr octahedra, corners with four equivalent O(4)Sr2La3Cr octahedra, corners with twelve equivalent O(1)Sr2La2CrNi octahedra, edges with two equivalent O(2)Sr2La3Ni octahedra, edges with two equivalent O(3)Sr3La2Cr octahedra, edges with four equivalent O(5)Sr3La2Ni octahedra, and faces with four equivalent O(1)Sr2La2CrNi octahedra. The corner-sharing octahedral tilt angles range from 0-54°. In the fifth O site, O(5) is bonded to one Sr(2), two equivalent Sr(1), two equivalent La(1), and one Ni(1) atom to form distorted OSr3La2Ni octahedra that share  a cornercorner with one O(2)Sr2La3Ni octahedra, corners with four equivalent O(5)Sr3La2Ni octahedra, corners with twelve equivalent O(1)Sr2La2CrNi octahedra, edges with two equivalent O(2)Sr2La3Ni octahedra, edges with two equivalent O(3)Sr3La2Cr octahedra, edges with four equivalent O(4)Sr2La3Cr octahedra, and faces with four equivalent O(1)Sr2La2CrNi octahedra. The corner-sharing octahedral tilt angles range from 0-54°.
Sr2La2CrNiO8 is (La,Ba)CuO4-derived structured and crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one O(3), two equivalent O(4), two equivalent O(5), and four equivalent O(1) atoms. The Sr(1)-O(3) bond length is 2.46 Å. Both Sr(1)-O(4) bond lengths are 2.76 Å. Both Sr(1)-O(5) bond lengths are 2.76 Å. All Sr(1)-O(1) bond lengths are 2.67 Å. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one O(5), two equivalent O(2), two equivalent O(3), and four equivalent O(1) atoms. The Sr(2)-O(5) bond length is 2.42 Å. Both Sr(2)-O(2) bond lengths are 2.77 Å. Both Sr(2)-O(3) bond lengths are 2.76 Å. All Sr(2)-O(1) bond lengths are 2.66 Å. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to one O(2), two equivalent O(4), two equivalent O(5), and four equivalent O(1) atoms. The La(1)-O(2) bond length is 2.31 Å. Both La(1)-O(4) bond lengths are 2.78 Å. Both La(1)-O(5) bond lengths are 2.76 Å. All La(1)-O(1) bond lengths are 2.63 Å. In the second La site, La(2) is bonded in a 9-coordinate geometry to one O(4), two equivalent O(2), two equivalent O(3), and four equivalent O(1) atoms. The La(2)-O(4) bond length is 2.40 Å. Both La(2)-O(2) bond lengths are 2.79 Å. Both La(2)-O(3) bond lengths are 2.75 Å. All La(2)-O(1) bond lengths are 2.61 Å. Cr(1) is bonded to one O(3), one O(4), and four equivalent O(1) atoms to form CrO6 octahedra that share corners with four equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles are 1°. The Cr(1)-O(3) bond length is 2.03 Å. The Cr(1)-O(4) bond length is 2.17 Å. All Cr(1)-O(1) bond lengths are 1.97 Å. Ni(1) is bonded to one O(2), one O(5), and four equivalent O(1) atoms to form NiO6 octahedra that share corners with four equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles are 1°. The Ni(1)-O(2) bond length is 2.28 Å. The Ni(1)-O(5) bond length is 2.05 Å. All Ni(1)-O(1) bond lengths are 1.92 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), one Sr(2), one La(1), one La(2), one Cr(1), and one Ni(1) atom to form distorted OSr2La2CrNi octahedra that share corners with two equivalent O(1)Sr2La2CrNi octahedra, corners with three equivalent O(4)Sr2La3Cr octahedra, corners with three equivalent O(2)Sr2La3Ni octahedra, corners with three equivalent O(3)Sr3La2Cr octahedra, corners with three equivalent O(5)Sr3La2Ni octahedra, edges with two equivalent O(1)Sr2La2CrNi octahedra,  a faceface with one O(4)Sr2La3Cr octahedra,  a faceface with one O(2)Sr2La3Ni octahedra,  a faceface with one O(3)Sr3La2Cr octahedra,  a faceface with one O(5)Sr3La2Ni octahedra, and faces with four equivalent O(1)Sr2La2CrNi octahedra. The corner-sharing octahedral tilt angles range from 0-56°. In the second O site, O(2) is bonded to two equivalent Sr(2), one La(1), two equivalent La(2), and one Ni(1) atom to form distorted OSr2La3Ni octahedra that share  a cornercorner with one O(5)Sr3La2Ni octahedra, corners with four equivalent O(2)Sr2La3Ni octahedra, corners with twelve equivalent O(1)Sr2La2CrNi octahedra, edges with two equivalent O(4)Sr2La3Cr octahedra, edges with two equivalent O(5)Sr3La2Ni octahedra, edges with four equivalent O(3)Sr3La2Cr octahedra, and faces with four equivalent O(1)Sr2La2CrNi octahedra. The corner-sharing octahedral tilt angles range from 0-52°. In the third O site, O(3) is bonded to one Sr(1), two equivalent Sr(2), two equivalent La(2), and one Cr(1) atom to form distorted OSr3La2Cr octahedra that share  a cornercorner with one O(4)Sr2La3Cr octahedra, corners with four equivalent O(3)Sr3La2Cr octahedra, corners with twelve equivalent O(1)Sr2La2CrNi octahedra, edges with two equivalent O(4)Sr2La3Cr octahedra, edges with two equivalent O(5)Sr3La2Ni octahedra, edges with four equivalent O(2)Sr2La3Ni octahedra, and faces with four equivalent O(1)Sr2La2CrNi octahedra. The corner-sharing octahedral tilt angles range from 0-56°. In the fourth O site, O(4) is bonded to two equivalent Sr(1), one La(2), two equivalent La(1), and one Cr(1) atom to form distorted OSr2La3Cr octahedra that share  a cornercorner with one O(3)Sr3La2Cr octahedra, corners with four equivalent O(4)Sr2La3Cr octahedra, corners with twelve equivalent O(1)Sr2La2CrNi octahedra, edges with two equivalent O(2)Sr2La3Ni octahedra, edges with two equivalent O(3)Sr3La2Cr octahedra, edges with four equivalent O(5)Sr3La2Ni octahedra, and faces with four equivalent O(1)Sr2La2CrNi octahedra. The corner-sharing octahedral tilt angles range from 0-54°. In the fifth O site, O(5) is bonded to one Sr(2), two equivalent Sr(1), two equivalent La(1), and one Ni(1) atom to form distorted OSr3La2Ni octahedra that share  a cornercorner with one O(2)Sr2La3Ni octahedra, corners with four equivalent O(5)Sr3La2Ni octahedra, corners with twelve equivalent O(1)Sr2La2CrNi octahedra, edges with two equivalent O(2)Sr2La3Ni octahedra, edges with two equivalent O(3)Sr3La2Cr octahedra, edges with four equivalent O(4)Sr2La3Cr octahedra, and faces with four equivalent O(1)Sr2La2CrNi octahedra. The corner-sharing octahedral tilt angles range from 0-54°.