Sr2Cu6P5 crystallizes in the tetragonal I4/mmm space group. Sr(1) is bonded in a 16-coordinate geometry to four equivalent Cu(1), four equivalent Cu(2), four equivalent P(2), and four equivalent P(3) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 4-coordinate geometry to two equivalent Sr(1), two equivalent P(1), and two equivalent P(2) atoms. In the second Cu site, Cu(2) is bonded to four equivalent Sr(1) and four equivalent P(3) atoms to form a mixture of distorted face and edge-sharing CuSr4P4 tetrahedra. There are three inequivalent P sites. In the first P site, P(1) is bonded in a body-centered cubic geometry to eight equivalent Cu(1) atoms. In the second P site, P(2) is bonded in a 9-coordinate geometry to four equivalent Sr(1), four equivalent Cu(1), and one P(3) atom. In the third P site, P(3) is bonded in a 9-coordinate geometry to four equivalent Sr(1), four equivalent Cu(2), and one P(2) atom.
Sr2Cu6P5 crystallizes in the tetragonal I4/mmm space group. Sr(1) is bonded in a 16-coordinate geometry to four equivalent Cu(1), four equivalent Cu(2), four equivalent P(2), and four equivalent P(3) atoms. All Sr(1)-Cu(1) bond lengths are 3.15 Å. All Sr(1)-Cu(2) bond lengths are 3.23 Å. All Sr(1)-P(2) bond lengths are 3.11 Å. All Sr(1)-P(3) bond lengths are 3.15 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 4-coordinate geometry to two equivalent Sr(1), two equivalent P(1), and two equivalent P(2) atoms. Both Cu(1)-P(1) bond lengths are 2.42 Å. Both Cu(1)-P(2) bond lengths are 2.42 Å. In the second Cu site, Cu(2) is bonded to four equivalent Sr(1) and four equivalent P(3) atoms to form a mixture of distorted face and edge-sharing CuSr4P4 tetrahedra. All Cu(2)-P(3) bond lengths are 2.42 Å. There are three inequivalent P sites. In the first P site, P(1) is bonded in a body-centered cubic geometry to eight equivalent Cu(1) atoms. In the second P site, P(2) is bonded in a 9-coordinate geometry to four equivalent Sr(1), four equivalent Cu(1), and one P(3) atom. The P(2)-P(3) bond length is 2.33 Å. In the third P site, P(3) is bonded in a 9-coordinate geometry to four equivalent Sr(1), four equivalent Cu(2), and one P(2) atom.