Sr2Cu(PO4)2 crystallizes in the monoclinic C2/m space group. Sr(1) is bonded in a 9-coordinate geometry to two equivalent O(3), three equivalent O(2), and four equivalent O(1) atoms. Cu(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. P(1) is bonded in a tetrahedral geometry to one O(2), one O(3), and two equivalent O(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Cu(1), and one P(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to three equivalent Sr(1) and one P(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Sr(1) and one P(1) atom.
Sr2Cu(PO4)2 crystallizes in the monoclinic C2/m space group. Sr(1) is bonded in a 9-coordinate geometry to two equivalent O(3), three equivalent O(2), and four equivalent O(1) atoms. There is one shorter (2.49 Å) and one longer (2.56 Å) Sr(1)-O(3) bond length. There are two shorter (2.74 Å) and one longer (2.95 Å) Sr(1)-O(2) bond length. There are two shorter (2.70 Å) and two longer (2.79 Å) Sr(1)-O(1) bond lengths. Cu(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. All Cu(1)-O(1) bond lengths are 1.96 Å. P(1) is bonded in a tetrahedral geometry to one O(2), one O(3), and two equivalent O(1) atoms. The P(1)-O(2) bond length is 1.55 Å. The P(1)-O(3) bond length is 1.53 Å. Both P(1)-O(1) bond lengths are 1.58 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Cu(1), and one P(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to three equivalent Sr(1) and one P(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Sr(1) and one P(1) atom.