SrGe(PO4)2 crystallizes in the monoclinic C2/c space group. Sr(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(4) atoms. Ge(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form GeO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with three equivalent Ge(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 37-50°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Sr(1), one Ge(1), and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Sr(1), one Ge(1), and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Ge(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent Sr(1) and one P(1) atom.
SrGe(PO4)2 crystallizes in the monoclinic C2/c space group. Sr(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(4) atoms. Both Sr(1)-O(1) bond lengths are 2.67 Å. Both Sr(1)-O(2) bond lengths are 2.62 Å. There are two shorter (2.59 Å) and two longer (2.72 Å) Sr(1)-O(4) bond lengths. Ge(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form GeO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra. Both Ge(1)-O(1) bond lengths are 1.89 Å. Both Ge(1)-O(2) bond lengths are 1.89 Å. Both Ge(1)-O(3) bond lengths are 1.82 Å. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with three equivalent Ge(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 37-50°. The P(1)-O(1) bond length is 1.55 Å. The P(1)-O(2) bond length is 1.56 Å. The P(1)-O(3) bond length is 1.52 Å. The P(1)-O(4) bond length is 1.50 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Sr(1), one Ge(1), and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Sr(1), one Ge(1), and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Ge(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent Sr(1) and one P(1) atom.