Sm2CoO3 crystallizes in the triclinic P1 space group. There are ten inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 5-coordinate geometry to one Co(5), one O(13), one O(15), one O(4), and one O(5) atom. In the second Sm site, Sm(2) is bonded in a distorted rectangular see-saw-like geometry to one O(14), one O(5), one O(6), and one O(8) atom. In the third Sm site, Sm(3) is bonded in a 5-coordinate geometry to one O(5), one O(6), one O(7), one O(8), and one O(9) atom. In the fourth Sm site, Sm(4) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(15), one O(7), and one O(9) atom. In the fifth Sm site, Sm(5) is bonded in a 4-coordinate geometry to one O(10), one O(7), one O(8), and one O(9) atom. In the sixth Sm site, Sm(6) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(11), one O(3), and one O(9) atom. In the seventh Sm site, Sm(7) is bonded in a 4-coordinate geometry to one O(1), one O(10), one O(12), and one O(2) atom. In the eighth Sm site, Sm(8) is bonded to one O(11), one O(13), one O(14), one O(2), and one O(4) atom to form a mixture of distorted corner and edge-sharing SmO5 square pyramids. In the ninth Sm site, Sm(9) is bonded in a 7-coordinate geometry to one O(11), one O(12), one O(13), one O(14), one O(3), one O(5), and one O(6) atom. In the tenth Sm site, Sm(10) is bonded to one O(11), one O(12), one O(14), one O(2), and one O(3) atom to form a mixture of distorted corner and edge-sharing SmO5 trigonal bipyramids. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded in a distorted trigonal non-coplanar geometry to one O(10), one O(15), one O(7), and one O(8) atom. In the second Co site, Co(2) is bonded in a distorted linear geometry to one O(2) and one O(7) atom. In the third Co site, Co(3) is bonded in a distorted rectangular see-saw-like geometry to one O(12), one O(13), one O(3), and one O(4) atom. In the fourth Co site, Co(4) is bonded in a distorted L-shaped geometry to one O(13) and one O(4) atom. In the fifth Co site, Co(5) is bonded in a distorted linear geometry to one Sm(1), one O(15), and one O(6) atom. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Sm(4), one Sm(6), and one Sm(7) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Sm(10), one Sm(7), one Sm(8), and one Co(2) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Sm(10), one Sm(6), one Sm(9), and one Co(3) atom. In the fourth O site, O(4) is bonded in a see-saw-like geometry to one Sm(1), one Sm(8), one Co(3), and one Co(4) atom. In the fifth O site, O(5) is bonded to one Sm(1), one Sm(2), one Sm(3), and one Sm(9) atom to form distorted OSm4 tetrahedra that share  a cornercorner with one O(11)Sm4 tetrahedra,  a cornercorner with one O(9)Sm4 tetrahedra, corners with two equivalent O(14)Sm4 tetrahedra, and corners with two equivalent O(13)Sm3Co2 trigonal bipyramids. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Sm(2), one Sm(3), one Sm(9), and one Co(5) atom. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one Sm(3), one Sm(4), one Sm(5), one Co(1), and one Co(2) atom. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Sm(2), one Sm(3), one Sm(5), and one Co(1) atom. In the ninth O site, O(9) is bonded to one Sm(3), one Sm(4), one Sm(5), and one Sm(6) atom to form distorted corner-sharing OSm4 tetrahedra. In the tenth O site, O(10) is bonded in a 5-coordinate geometry to one Sm(4), one Sm(5), one Sm(6), one Sm(7), and one Co(1) atom. In the eleventh O site, O(11) is bonded to one Sm(10), one Sm(6), one Sm(8), and one Sm(9) atom to form OSm4 tetrahedra that share  a cornercorner with one O(5)Sm4 tetrahedra,  a cornercorner with one O(9)Sm4 tetrahedra, corners with three equivalent O(14)Sm4 tetrahedra, and  an edgeedge with one O(13)Sm3Co2 trigonal bipyramid. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Sm(10), one Sm(7), one Sm(9), and one Co(3) atom. In the thirteenth O site, O(13) is bonded to one Sm(1), one Sm(8), one Sm(9), one Co(3), and one Co(4) atom to form a mixture of distorted corner and edge-sharing OSm3Co2 trigonal bipyramids. In the fourteenth O site, O(14) is bonded to one Sm(10), one Sm(2), one Sm(8), and one Sm(9) atom to form OSm4 tetrahedra that share corners with two equivalent O(5)Sm4 tetrahedra, corners with three equivalent O(11)Sm4 tetrahedra, and corners with two equivalent O(13)Sm3Co2 trigonal bipyramids. In the fifteenth O site, O(15) is bonded in a 4-coordinate geometry to one Sm(1), one Sm(4), one Co(1), and one Co(5) atom.
Sm2CoO3 crystallizes in the triclinic P1 space group. There are ten inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 5-coordinate geometry to one Co(5), one O(13), one O(15), one O(4), and one O(5) atom. The Sm(1)-Co(5) bond length is 2.53 Å. The Sm(1)-O(13) bond length is 2.38 Å. The Sm(1)-O(15) bond length is 2.43 Å. The Sm(1)-O(4) bond length is 2.17 Å. The Sm(1)-O(5) bond length is 2.32 Å. In the second Sm site, Sm(2) is bonded in a distorted rectangular see-saw-like geometry to one O(14), one O(5), one O(6), and one O(8) atom. The Sm(2)-O(14) bond length is 2.32 Å. The Sm(2)-O(5) bond length is 2.27 Å. The Sm(2)-O(6) bond length is 2.23 Å. The Sm(2)-O(8) bond length is 2.36 Å. In the third Sm site, Sm(3) is bonded in a 5-coordinate geometry to one O(5), one O(6), one O(7), one O(8), and one O(9) atom. The Sm(3)-O(5) bond length is 2.48 Å. The Sm(3)-O(6) bond length is 2.40 Å. The Sm(3)-O(7) bond length is 2.34 Å. The Sm(3)-O(8) bond length is 2.36 Å. The Sm(3)-O(9) bond length is 2.24 Å. In the fourth Sm site, Sm(4) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(15), one O(7), and one O(9) atom. The Sm(4)-O(1) bond length is 2.24 Å. The Sm(4)-O(10) bond length is 2.67 Å. The Sm(4)-O(15) bond length is 2.30 Å. The Sm(4)-O(7) bond length is 2.98 Å. The Sm(4)-O(9) bond length is 2.29 Å. In the fifth Sm site, Sm(5) is bonded in a 4-coordinate geometry to one O(10), one O(7), one O(8), and one O(9) atom. The Sm(5)-O(10) bond length is 2.31 Å. The Sm(5)-O(7) bond length is 2.40 Å. The Sm(5)-O(8) bond length is 2.39 Å. The Sm(5)-O(9) bond length is 2.38 Å. In the sixth Sm site, Sm(6) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(11), one O(3), and one O(9) atom. The Sm(6)-O(1) bond length is 2.29 Å. The Sm(6)-O(10) bond length is 2.38 Å. The Sm(6)-O(11) bond length is 2.43 Å. The Sm(6)-O(3) bond length is 2.37 Å. The Sm(6)-O(9) bond length is 2.51 Å. In the seventh Sm site, Sm(7) is bonded in a 4-coordinate geometry to one O(1), one O(10), one O(12), and one O(2) atom. The Sm(7)-O(1) bond length is 2.29 Å. The Sm(7)-O(10) bond length is 2.32 Å. The Sm(7)-O(12) bond length is 2.38 Å. The Sm(7)-O(2) bond length is 2.45 Å. In the eighth Sm site, Sm(8) is bonded to one O(11), one O(13), one O(14), one O(2), and one O(4) atom to form a mixture of distorted corner and edge-sharing SmO5 square pyramids. The Sm(8)-O(11) bond length is 2.35 Å. The Sm(8)-O(13) bond length is 2.25 Å. The Sm(8)-O(14) bond length is 2.40 Å. The Sm(8)-O(2) bond length is 2.44 Å. The Sm(8)-O(4) bond length is 2.19 Å. In the ninth Sm site, Sm(9) is bonded in a 7-coordinate geometry to one O(11), one O(12), one O(13), one O(14), one O(3), one O(5), and one O(6) atom. The Sm(9)-O(11) bond length is 2.32 Å. The Sm(9)-O(12) bond length is 2.45 Å. The Sm(9)-O(13) bond length is 2.80 Å. The Sm(9)-O(14) bond length is 2.31 Å. The Sm(9)-O(3) bond length is 2.81 Å. The Sm(9)-O(5) bond length is 2.46 Å. The Sm(9)-O(6) bond length is 2.39 Å. In the tenth Sm site, Sm(10) is bonded to one O(11), one O(12), one O(14), one O(2), and one O(3) atom to form a mixture of distorted corner and edge-sharing SmO5 trigonal bipyramids. The Sm(10)-O(11) bond length is 2.34 Å. The Sm(10)-O(12) bond length is 2.62 Å. The Sm(10)-O(14) bond length is 2.31 Å. The Sm(10)-O(2) bond length is 2.31 Å. The Sm(10)-O(3) bond length is 2.25 Å. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded in a distorted trigonal non-coplanar geometry to one O(10), one O(15), one O(7), and one O(8) atom. The Co(1)-O(10) bond length is 2.72 Å. The Co(1)-O(15) bond length is 2.04 Å. The Co(1)-O(7) bond length is 2.12 Å. The Co(1)-O(8) bond length is 2.11 Å. In the second Co site, Co(2) is bonded in a distorted linear geometry to one O(2) and one O(7) atom. The Co(2)-O(2) bond length is 1.87 Å. The Co(2)-O(7) bond length is 1.86 Å. In the third Co site, Co(3) is bonded in a distorted rectangular see-saw-like geometry to one O(12), one O(13), one O(3), and one O(4) atom. The Co(3)-O(12) bond length is 2.10 Å. The Co(3)-O(13) bond length is 2.18 Å. The Co(3)-O(3) bond length is 1.84 Å. The Co(3)-O(4) bond length is 2.36 Å. In the fourth Co site, Co(4) is bonded in a distorted L-shaped geometry to one O(13) and one O(4) atom. The Co(4)-O(13) bond length is 2.14 Å. The Co(4)-O(4) bond length is 2.27 Å. In the fifth Co site, Co(5) is bonded in a distorted linear geometry to one Sm(1), one O(15), and one O(6) atom. The Co(5)-O(15) bond length is 1.84 Å. The Co(5)-O(6) bond length is 1.80 Å. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Sm(4), one Sm(6), and one Sm(7) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Sm(10), one Sm(7), one Sm(8), and one Co(2) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Sm(10), one Sm(6), one Sm(9), and one Co(3) atom. In the fourth O site, O(4) is bonded in a see-saw-like geometry to one Sm(1), one Sm(8), one Co(3), and one Co(4) atom. In the fifth O site, O(5) is bonded to one Sm(1), one Sm(2), one Sm(3), and one Sm(9) atom to form distorted OSm4 tetrahedra that share  a cornercorner with one O(11)Sm4 tetrahedra,  a cornercorner with one O(9)Sm4 tetrahedra, corners with two equivalent O(14)Sm4 tetrahedra, and corners with two equivalent O(13)Sm3Co2 trigonal bipyramids. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Sm(2), one Sm(3), one Sm(9), and one Co(5) atom. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one Sm(3), one Sm(4), one Sm(5), one Co(1), and one Co(2) atom. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Sm(2), one Sm(3), one Sm(5), and one Co(1) atom. In the ninth O site, O(9) is bonded to one Sm(3), one Sm(4), one Sm(5), and one Sm(6) atom to form distorted corner-sharing OSm4 tetrahedra. In the tenth O site, O(10) is bonded in a 5-coordinate geometry to one Sm(4), one Sm(5), one Sm(6), one Sm(7), and one Co(1) atom. In the eleventh O site, O(11) is bonded to one Sm(10), one Sm(6), one Sm(8), and one Sm(9) atom to form OSm4 tetrahedra that share  a cornercorner with one O(5)Sm4 tetrahedra,  a cornercorner with one O(9)Sm4 tetrahedra, corners with three equivalent O(14)Sm4 tetrahedra, and  an edgeedge with one O(13)Sm3Co2 trigonal bipyramid. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Sm(10), one Sm(7), one Sm(9), and one Co(3) atom. In the thirteenth O site, O(13) is bonded to one Sm(1), one Sm(8), one Sm(9), one Co(3), and one Co(4) atom to form a mixture of distorted corner and edge-sharing OSm3Co2 trigonal bipyramids. In the fourteenth O site, O(14) is bonded to one Sm(10), one Sm(2), one Sm(8), and one Sm(9) atom to form OSm4 tetrahedra that share corners with two equivalent O(5)Sm4 tetrahedra, corners with three equivalent O(11)Sm4 tetrahedra, and corners with two equivalent O(13)Sm3Co2 trigonal bipyramids. In the fifteenth O site, O(15) is bonded in a 4-coordinate geometry to one Sm(1), one Sm(4), one Co(1), and one Co(5) atom.