SrNiSi3 crystallizes in the tetragonal I4mm space group. Sr(1) is bonded in a 16-coordinate geometry to four equivalent Ni(1), four equivalent Si(1), and eight equivalent Si(2) atoms. Ni(1) is bonded in a 5-coordinate geometry to four equivalent Sr(1), one Si(1), and four equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to four equivalent Sr(1), one Ni(1), and four equivalent Si(2) atoms. In the second Si site, Si(2) is bonded in a 8-coordinate geometry to four equivalent Sr(1), two equivalent Ni(1), and two equivalent Si(1) atoms.
SrNiSi3 crystallizes in the tetragonal I4mm space group. Sr(1) is bonded in a 16-coordinate geometry to four equivalent Ni(1), four equivalent Si(1), and eight equivalent Si(2) atoms. All Sr(1)-Ni(1) bond lengths are 3.28 Å. All Sr(1)-Si(1) bond lengths are 3.10 Å. There are four shorter (3.21 Å) and four longer (3.22 Å) Sr(1)-Si(2) bond lengths. Ni(1) is bonded in a 5-coordinate geometry to four equivalent Sr(1), one Si(1), and four equivalent Si(2) atoms. The Ni(1)-Si(1) bond length is 2.37 Å. All Ni(1)-Si(2) bond lengths are 2.33 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to four equivalent Sr(1), one Ni(1), and four equivalent Si(2) atoms. All Si(1)-Si(2) bond lengths are 2.56 Å. In the second Si site, Si(2) is bonded in a 8-coordinate geometry to four equivalent Sr(1), two equivalent Ni(1), and two equivalent Si(1) atoms.