Sr3LaTaAl3O12 is (Cubic) Perovskite-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 to one O(2), one O(3), two equivalent O(1), four equivalent O(4), and four equivalent O(5) atoms to form SrO12 cuboctahedra that share corners with four equivalent La(1)O12 cuboctahedra, corners with eight equivalent Sr(2)O12 cuboctahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with four equivalent Sr(2)O12 cuboctahedra, faces with two equivalent Ta(1)O6 octahedra, faces with two equivalent Al(2)O6 octahedra, and faces with four equivalent Al(1)O6 octahedra. In the second Sr site, Sr(2) is bonded to one O(2), one O(3), two equivalent O(1), two equivalent O(4), two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms to form SrO12 cuboctahedra that share corners with four equivalent Sr(1)O12 cuboctahedra, corners with four equivalent Sr(2)O12 cuboctahedra, corners with four equivalent La(1)O12 cuboctahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Sr(2)O12 cuboctahedra, faces with two equivalent La(1)O12 cuboctahedra, faces with two equivalent Ta(1)O6 octahedra, faces with two equivalent Al(2)O6 octahedra, and faces with four equivalent Al(1)O6 octahedra. La(1) is bonded to one O(2), one O(3), two equivalent O(1), four equivalent O(6), and four equivalent O(7) atoms to form LaO12 cuboctahedra that share corners with four equivalent Sr(1)O12 cuboctahedra, corners with eight equivalent Sr(2)O12 cuboctahedra, faces with two equivalent La(1)O12 cuboctahedra, faces with four equivalent Sr(2)O12 cuboctahedra, faces with two equivalent Ta(1)O6 octahedra, faces with two equivalent Al(2)O6 octahedra, and faces with four equivalent Al(1)O6 octahedra. Ta(1) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form TaO6 octahedra that share corners with two equivalent Ta(1)O6 octahedra, corners with four equivalent Al(1)O6 octahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with two equivalent La(1)O12 cuboctahedra, and faces with four equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 2-4°. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(4), one O(5), one O(6), one O(7), and two equivalent O(1) atoms to form AlO6 octahedra that share corners with two equivalent Ta(1)O6 octahedra, corners with two equivalent Al(1)O6 octahedra, corners with two equivalent Al(2)O6 octahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with two equivalent La(1)O12 cuboctahedra, and faces with four equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 1-4°. In the second Al site, Al(2) is bonded to two equivalent O(3), two equivalent O(5), and two equivalent O(7) atoms to form AlO6 octahedra that share corners with two equivalent Al(2)O6 octahedra, corners with four equivalent Al(1)O6 octahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with two equivalent La(1)O12 cuboctahedra, and faces with four equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 1-5°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Sr(1), two equivalent Sr(2), one La(1), and two equivalent Al(1) atoms. In the second O site, O(2) is bonded in a distorted linear geometry to one Sr(1), two equivalent Sr(2), one La(1), and two equivalent Ta(1) atoms. In the third O site, O(3) is bonded to one Sr(1), two equivalent Sr(2), one La(1), and two equivalent Al(2) atoms to form distorted OSr3LaAl2 octahedra that share corners with two equivalent O(3)Sr3LaAl2 octahedra, faces with four equivalent O(7)Sr2La2Al2 octahedra, and faces with four equivalent O(5)Sr4Al2 octahedra. The corner-sharing octahedral tilt angles are 5°. In the fourth O site, O(4) is bonded in a distorted linear geometry to two equivalent Sr(1), two equivalent Sr(2), one Ta(1), and one Al(1) atom. In the fifth O site, O(5) is bonded to two equivalent Sr(1), two equivalent Sr(2), one Al(1), and one Al(2) atom to form distorted OSr4Al2 octahedra that share corners with two equivalent O(5)Sr4Al2 octahedra, corners with four equivalent O(7)Sr2La2Al2 octahedra, edges with two equivalent O(5)Sr4Al2 octahedra,  a faceface with one O(7)Sr2La2Al2 octahedra,  a faceface with one O(5)Sr4Al2 octahedra, and faces with two equivalent O(3)Sr3LaAl2 octahedra. The corner-sharing octahedral tilt angles range from 2-56°. In the sixth O site, O(6) is bonded in a distorted linear geometry to two equivalent Sr(2), two equivalent La(1), one Ta(1), and one Al(1) atom. In the seventh O site, O(7) is bonded to two equivalent Sr(2), two equivalent La(1), one Al(1), and one Al(2) atom to form distorted OSr2La2Al2 octahedra that share corners with two equivalent O(7)Sr2La2Al2 octahedra, corners with four equivalent O(5)Sr4Al2 octahedra, edges with two equivalent O(7)Sr2La2Al2 octahedra,  a faceface with one O(7)Sr2La2Al2 octahedra,  a faceface with one O(5)Sr4Al2 octahedra, and faces with two equivalent O(3)Sr3LaAl2 octahedra. The corner-sharing octahedral tilt angles range from 2-56°.
Sr3LaTaAl3O12 is (Cubic) Perovskite-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 to one O(2), one O(3), two equivalent O(1), four equivalent O(4), and four equivalent O(5) atoms to form SrO12 cuboctahedra that share corners with four equivalent La(1)O12 cuboctahedra, corners with eight equivalent Sr(2)O12 cuboctahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with four equivalent Sr(2)O12 cuboctahedra, faces with two equivalent Ta(1)O6 octahedra, faces with two equivalent Al(2)O6 octahedra, and faces with four equivalent Al(1)O6 octahedra. The Sr(1)-O(2) bond length is 2.93 Å. The Sr(1)-O(3) bond length is 2.65 Å. Both Sr(1)-O(1) bond lengths are 2.79 Å. All Sr(1)-O(4) bond lengths are 2.84 Å. All Sr(1)-O(5) bond lengths are 2.69 Å. In the second Sr site, Sr(2) is bonded to one O(2), one O(3), two equivalent O(1), two equivalent O(4), two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms to form SrO12 cuboctahedra that share corners with four equivalent Sr(1)O12 cuboctahedra, corners with four equivalent Sr(2)O12 cuboctahedra, corners with four equivalent La(1)O12 cuboctahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Sr(2)O12 cuboctahedra, faces with two equivalent La(1)O12 cuboctahedra, faces with two equivalent Ta(1)O6 octahedra, faces with two equivalent Al(2)O6 octahedra, and faces with four equivalent Al(1)O6 octahedra. The Sr(2)-O(2) bond length is 2.86 Å. The Sr(2)-O(3) bond length is 2.61 Å. Both Sr(2)-O(1) bond lengths are 2.75 Å. Both Sr(2)-O(4) bond lengths are 2.81 Å. Both Sr(2)-O(5) bond lengths are 2.69 Å. Both Sr(2)-O(6) bond lengths are 2.85 Å. Both Sr(2)-O(7) bond lengths are 2.74 Å. La(1) is bonded to one O(2), one O(3), two equivalent O(1), four equivalent O(6), and four equivalent O(7) atoms to form LaO12 cuboctahedra that share corners with four equivalent Sr(1)O12 cuboctahedra, corners with eight equivalent Sr(2)O12 cuboctahedra, faces with two equivalent La(1)O12 cuboctahedra, faces with four equivalent Sr(2)O12 cuboctahedra, faces with two equivalent Ta(1)O6 octahedra, faces with two equivalent Al(2)O6 octahedra, and faces with four equivalent Al(1)O6 octahedra. The La(1)-O(2) bond length is 2.89 Å. The La(1)-O(3) bond length is 2.53 Å. Both La(1)-O(1) bond lengths are 2.69 Å. All La(1)-O(6) bond lengths are 2.81 Å. All La(1)-O(7) bond lengths are 2.64 Å. Ta(1) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form TaO6 octahedra that share corners with two equivalent Ta(1)O6 octahedra, corners with four equivalent Al(1)O6 octahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with two equivalent La(1)O12 cuboctahedra, and faces with four equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 2-4°. Both Ta(1)-O(2) bond lengths are 1.96 Å. Both Ta(1)-O(4) bond lengths are 1.96 Å. Both Ta(1)-O(6) bond lengths are 1.99 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(4), one O(5), one O(6), one O(7), and two equivalent O(1) atoms to form AlO6 octahedra that share corners with two equivalent Ta(1)O6 octahedra, corners with two equivalent Al(1)O6 octahedra, corners with two equivalent Al(2)O6 octahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with two equivalent La(1)O12 cuboctahedra, and faces with four equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 1-4°. The Al(1)-O(4) bond length is 1.90 Å. The Al(1)-O(5) bond length is 1.93 Å. The Al(1)-O(6) bond length is 1.91 Å. The Al(1)-O(7) bond length is 1.96 Å. Both Al(1)-O(1) bond lengths are 1.96 Å. In the second Al site, Al(2) is bonded to two equivalent O(3), two equivalent O(5), and two equivalent O(7) atoms to form AlO6 octahedra that share corners with two equivalent Al(2)O6 octahedra, corners with four equivalent Al(1)O6 octahedra, faces with two equivalent Sr(1)O12 cuboctahedra, faces with two equivalent La(1)O12 cuboctahedra, and faces with four equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 1-5°. Both Al(2)-O(3) bond lengths are 1.96 Å. Both Al(2)-O(5) bond lengths are 1.91 Å. Both Al(2)-O(7) bond lengths are 1.96 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Sr(1), two equivalent Sr(2), one La(1), and two equivalent Al(1) atoms. In the second O site, O(2) is bonded in a distorted linear geometry to one Sr(1), two equivalent Sr(2), one La(1), and two equivalent Ta(1) atoms. In the third O site, O(3) is bonded to one Sr(1), two equivalent Sr(2), one La(1), and two equivalent Al(2) atoms to form distorted OSr3LaAl2 octahedra that share corners with two equivalent O(3)Sr3LaAl2 octahedra, faces with four equivalent O(7)Sr2La2Al2 octahedra, and faces with four equivalent O(5)Sr4Al2 octahedra. The corner-sharing octahedral tilt angles are 5°. In the fourth O site, O(4) is bonded in a distorted linear geometry to two equivalent Sr(1), two equivalent Sr(2), one Ta(1), and one Al(1) atom. In the fifth O site, O(5) is bonded to two equivalent Sr(1), two equivalent Sr(2), one Al(1), and one Al(2) atom to form distorted OSr4Al2 octahedra that share corners with two equivalent O(5)Sr4Al2 octahedra, corners with four equivalent O(7)Sr2La2Al2 octahedra, edges with two equivalent O(5)Sr4Al2 octahedra,  a faceface with one O(7)Sr2La2Al2 octahedra,  a faceface with one O(5)Sr4Al2 octahedra, and faces with two equivalent O(3)Sr3LaAl2 octahedra. The corner-sharing octahedral tilt angles range from 2-56°. In the sixth O site, O(6) is bonded in a distorted linear geometry to two equivalent Sr(2), two equivalent La(1), one Ta(1), and one Al(1) atom. In the seventh O site, O(7) is bonded to two equivalent Sr(2), two equivalent La(1), one Al(1), and one Al(2) atom to form distorted OSr2La2Al2 octahedra that share corners with two equivalent O(7)Sr2La2Al2 octahedra, corners with four equivalent O(5)Sr4Al2 octahedra, edges with two equivalent O(7)Sr2La2Al2 octahedra,  a faceface with one O(7)Sr2La2Al2 octahedra,  a faceface with one O(5)Sr4Al2 octahedra, and faces with two equivalent O(3)Sr3LaAl2 octahedra. The corner-sharing octahedral tilt angles range from 2-56°.