CeIn3(CuSe2)4 is Stannite-like structured and crystallizes in the tetragonal P-4 space group. Ce(1) is bonded to four equivalent Se(1) atoms to form CeSe4 tetrahedra that share corners with four equivalent Cu(1)Se4 tetrahedra, corners with four equivalent Cu(3)Se4 tetrahedra, and corners with four equivalent In(1)Se4 tetrahedra. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to two equivalent Se(1) and two equivalent Se(2) atoms to form CuSe4 tetrahedra that share corners with two equivalent Ce(1)Se4 tetrahedra, corners with two equivalent Cu(2)Se4 tetrahedra, corners with two equivalent Cu(3)Se4 tetrahedra, corners with two equivalent In(2)Se4 tetrahedra, and corners with four equivalent In(1)Se4 tetrahedra. In the second Cu site, Cu(2) is bonded to four equivalent Se(2) atoms to form CuSe4 tetrahedra that share corners with four equivalent Cu(1)Se4 tetrahedra, corners with four equivalent In(1)Se4 tetrahedra, and corners with four equivalent In(2)Se4 tetrahedra. In the third Cu site, Cu(3) is bonded to four equivalent Se(1) atoms to form CuSe4 tetrahedra that share corners with four equivalent Ce(1)Se4 tetrahedra, corners with four equivalent Cu(1)Se4 tetrahedra, and corners with four equivalent In(1)Se4 tetrahedra. There are two inequivalent In sites. In the first In site, In(1) is bonded to two equivalent Se(1) and two equivalent Se(2) atoms to form InSe4 tetrahedra that share corners with two equivalent Ce(1)Se4 tetrahedra, corners with two equivalent Cu(2)Se4 tetrahedra, corners with two equivalent Cu(3)Se4 tetrahedra, corners with two equivalent In(2)Se4 tetrahedra, and corners with four equivalent Cu(1)Se4 tetrahedra. In the second In site, In(2) is bonded to four equivalent Se(2) atoms to form InSe4 tetrahedra that share corners with four equivalent Cu(1)Se4 tetrahedra, corners with four equivalent Cu(2)Se4 tetrahedra, and corners with four equivalent In(1)Se4 tetrahedra. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded to one Ce(1), one Cu(1), one Cu(3), and one In(1) atom to form SeCeInCu2 tetrahedra that share corners with four equivalent Se(2)In2Cu2 tetrahedra and corners with eight equivalent Se(1)CeInCu2 tetrahedra. In the second Se site, Se(2) is bonded to one Cu(1), one Cu(2), one In(1), and one In(2) atom to form SeIn2Cu2 tetrahedra that share corners with four equivalent Se(1)CeInCu2 tetrahedra and corners with eight equivalent Se(2)In2Cu2 tetrahedra.
CeIn3(CuSe2)4 is Stannite-like structured and crystallizes in the tetragonal P-4 space group. Ce(1) is bonded to four equivalent Se(1) atoms to form CeSe4 tetrahedra that share corners with four equivalent Cu(1)Se4 tetrahedra, corners with four equivalent Cu(3)Se4 tetrahedra, and corners with four equivalent In(1)Se4 tetrahedra. All Ce(1)-Se(1) bond lengths are 2.84 Å. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to two equivalent Se(1) and two equivalent Se(2) atoms to form CuSe4 tetrahedra that share corners with two equivalent Ce(1)Se4 tetrahedra, corners with two equivalent Cu(2)Se4 tetrahedra, corners with two equivalent Cu(3)Se4 tetrahedra, corners with two equivalent In(2)Se4 tetrahedra, and corners with four equivalent In(1)Se4 tetrahedra. Both Cu(1)-Se(1) bond lengths are 2.44 Å. Both Cu(1)-Se(2) bond lengths are 2.47 Å. In the second Cu site, Cu(2) is bonded to four equivalent Se(2) atoms to form CuSe4 tetrahedra that share corners with four equivalent Cu(1)Se4 tetrahedra, corners with four equivalent In(1)Se4 tetrahedra, and corners with four equivalent In(2)Se4 tetrahedra. All Cu(2)-Se(2) bond lengths are 2.44 Å. In the third Cu site, Cu(3) is bonded to four equivalent Se(1) atoms to form CuSe4 tetrahedra that share corners with four equivalent Ce(1)Se4 tetrahedra, corners with four equivalent Cu(1)Se4 tetrahedra, and corners with four equivalent In(1)Se4 tetrahedra. All Cu(3)-Se(1) bond lengths are 2.46 Å. There are two inequivalent In sites. In the first In site, In(1) is bonded to two equivalent Se(1) and two equivalent Se(2) atoms to form InSe4 tetrahedra that share corners with two equivalent Ce(1)Se4 tetrahedra, corners with two equivalent Cu(2)Se4 tetrahedra, corners with two equivalent Cu(3)Se4 tetrahedra, corners with two equivalent In(2)Se4 tetrahedra, and corners with four equivalent Cu(1)Se4 tetrahedra. Both In(1)-Se(1) bond lengths are 2.65 Å. Both In(1)-Se(2) bond lengths are 2.66 Å. In the second In site, In(2) is bonded to four equivalent Se(2) atoms to form InSe4 tetrahedra that share corners with four equivalent Cu(1)Se4 tetrahedra, corners with four equivalent Cu(2)Se4 tetrahedra, and corners with four equivalent In(1)Se4 tetrahedra. All In(2)-Se(2) bond lengths are 2.67 Å. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded to one Ce(1), one Cu(1), one Cu(3), and one In(1) atom to form SeCeInCu2 tetrahedra that share corners with four equivalent Se(2)In2Cu2 tetrahedra and corners with eight equivalent Se(1)CeInCu2 tetrahedra. In the second Se site, Se(2) is bonded to one Cu(1), one Cu(2), one In(1), and one In(2) atom to form SeIn2Cu2 tetrahedra that share corners with four equivalent Se(1)CeInCu2 tetrahedra and corners with eight equivalent Se(2)In2Cu2 tetrahedra.