SrGe3 crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 12-coordinate geometry to four equivalent Ge(1) and eight equivalent Ge(2) atoms. In the second Sr site, Sr(2) is bonded in a 12-coordinate geometry to four equivalent Ge(1) and eight equivalent Ge(2) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), one Ge(1), and four equivalent Ge(2) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), two equivalent Ge(1), and three equivalent Ge(2) atoms.
SrGe3 crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 12-coordinate geometry to four equivalent Ge(1) and eight equivalent Ge(2) atoms. All Sr(1)-Ge(1) bond lengths are 3.35 Å. There are four shorter (3.37 Å) and four longer (3.61 Å) Sr(1)-Ge(2) bond lengths. In the second Sr site, Sr(2) is bonded in a 12-coordinate geometry to four equivalent Ge(1) and eight equivalent Ge(2) atoms. All Sr(2)-Ge(1) bond lengths are 3.30 Å. All Sr(2)-Ge(2) bond lengths are 3.36 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), one Ge(1), and four equivalent Ge(2) atoms. The Ge(1)-Ge(1) bond length is 2.55 Å. All Ge(1)-Ge(2) bond lengths are 2.81 Å. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), two equivalent Ge(1), and three equivalent Ge(2) atoms. There is one shorter (2.60 Å) and two longer (2.83 Å) Ge(2)-Ge(2) bond lengths.