SmCoSe2O6Cl crystallizes in the triclinic P-1 space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 9-coordinate geometry to one O(1), one O(11), one O(2), one O(6), two equivalent O(3), two equivalent O(5), and one Cl(2) atom. In the second Sm site, Sm(2) is bonded in a 8-coordinate geometry to one O(4), one O(6), one O(9), two equivalent O(10), two equivalent O(7), and one Cl(1) atom. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(4), one O(8), and two equivalent Cl(2) atoms to form a mixture of distorted edge and corner-sharing CoCl2O4 octahedra. The corner-sharing octahedral tilt angles are 44°. In the second Co site, Co(2) is bonded to one O(11), one O(12), one O(8), one O(9), and two equivalent Cl(1) atoms to form a mixture of distorted edge and corner-sharing CoCl2O4 octahedra. The corner-sharing octahedral tilt angles are 44°. There are four inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted T-shaped geometry to one O(10), one O(4), and one O(9) atom. In the second Se site, Se(2) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(7), and one O(8) atom. In the third Se site, Se(3) is bonded in a distorted trigonal non-coplanar geometry to one O(11), one O(2), and one O(3) atom. In the fourth Se site, Se(4) is bonded in a trigonal non-coplanar geometry to one O(12), one O(5), and one O(6) atom. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Sm(1), one Co(1), and one Se(2) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Sm(1), one Co(1), and one Se(3) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Sm(1) and one Se(3) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Sm(2), one Co(1), and one Se(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to two equivalent Sm(1) and one Se(4) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Sm(1), one Sm(2), and one Se(4) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to two equivalent Sm(2) and one Se(2) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one Se(2) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Sm(2), one Co(2), and one Se(1) atom. In the tenth O site, O(10) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Sm(2) and one Se(1) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Sm(1), one Co(2), and one Se(3) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Co(2) and one Se(4) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a distorted trigonal non-coplanar geometry to one Sm(2) and two equivalent Co(2) atoms. In the second Cl site, Cl(2) is bonded in a 3-coordinate geometry to one Sm(1) and two equivalent Co(1) atoms.
SmCoSe2O6Cl crystallizes in the triclinic P-1 space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 9-coordinate geometry to one O(1), one O(11), one O(2), one O(6), two equivalent O(3), two equivalent O(5), and one Cl(2) atom. The Sm(1)-O(1) bond length is 2.49 Å. The Sm(1)-O(11) bond length is 2.54 Å. The Sm(1)-O(2) bond length is 2.53 Å. The Sm(1)-O(6) bond length is 2.51 Å. There is one shorter (2.53 Å) and one longer (2.61 Å) Sm(1)-O(3) bond length. There is one shorter (2.40 Å) and one longer (2.46 Å) Sm(1)-O(5) bond length. The Sm(1)-Cl(2) bond length is 2.99 Å. In the second Sm site, Sm(2) is bonded in a 8-coordinate geometry to one O(4), one O(6), one O(9), two equivalent O(10), two equivalent O(7), and one Cl(1) atom. The Sm(2)-O(4) bond length is 2.46 Å. The Sm(2)-O(6) bond length is 2.36 Å. The Sm(2)-O(9) bond length is 2.56 Å. There is one shorter (2.48 Å) and one longer (2.54 Å) Sm(2)-O(10) bond length. There is one shorter (2.41 Å) and one longer (2.44 Å) Sm(2)-O(7) bond length. The Sm(2)-Cl(1) bond length is 2.87 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(4), one O(8), and two equivalent Cl(2) atoms to form a mixture of distorted edge and corner-sharing CoCl2O4 octahedra. The corner-sharing octahedral tilt angles are 44°. The Co(1)-O(1) bond length is 2.19 Å. The Co(1)-O(2) bond length is 2.11 Å. The Co(1)-O(4) bond length is 2.09 Å. The Co(1)-O(8) bond length is 2.17 Å. There is one shorter (2.46 Å) and one longer (2.52 Å) Co(1)-Cl(2) bond length. In the second Co site, Co(2) is bonded to one O(11), one O(12), one O(8), one O(9), and two equivalent Cl(1) atoms to form a mixture of distorted edge and corner-sharing CoCl2O4 octahedra. The corner-sharing octahedral tilt angles are 44°. The Co(2)-O(11) bond length is 2.13 Å. The Co(2)-O(12) bond length is 2.04 Å. The Co(2)-O(8) bond length is 2.11 Å. The Co(2)-O(9) bond length is 2.13 Å. There is one shorter (2.53 Å) and one longer (2.56 Å) Co(2)-Cl(1) bond length. There are four inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted T-shaped geometry to one O(10), one O(4), and one O(9) atom. The Se(1)-O(10) bond length is 1.75 Å. The Se(1)-O(4) bond length is 1.74 Å. The Se(1)-O(9) bond length is 1.74 Å. In the second Se site, Se(2) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(7), and one O(8) atom. The Se(2)-O(1) bond length is 1.73 Å. The Se(2)-O(7) bond length is 1.74 Å. The Se(2)-O(8) bond length is 1.74 Å. In the third Se site, Se(3) is bonded in a distorted trigonal non-coplanar geometry to one O(11), one O(2), and one O(3) atom. The Se(3)-O(11) bond length is 1.74 Å. The Se(3)-O(2) bond length is 1.76 Å. The Se(3)-O(3) bond length is 1.73 Å. In the fourth Se site, Se(4) is bonded in a trigonal non-coplanar geometry to one O(12), one O(5), and one O(6) atom. The Se(4)-O(12) bond length is 1.70 Å. The Se(4)-O(5) bond length is 1.75 Å. The Se(4)-O(6) bond length is 1.76 Å. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Sm(1), one Co(1), and one Se(2) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Sm(1), one Co(1), and one Se(3) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Sm(1) and one Se(3) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Sm(2), one Co(1), and one Se(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to two equivalent Sm(1) and one Se(4) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Sm(1), one Sm(2), and one Se(4) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to two equivalent Sm(2) and one Se(2) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one Se(2) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Sm(2), one Co(2), and one Se(1) atom. In the tenth O site, O(10) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Sm(2) and one Se(1) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Sm(1), one Co(2), and one Se(3) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Co(2) and one Se(4) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a distorted trigonal non-coplanar geometry to one Sm(2) and two equivalent Co(2) atoms. In the second Cl site, Cl(2) is bonded in a 3-coordinate geometry to one Sm(1) and two equivalent Co(1) atoms.