Sr3As4 crystallizes in the orthorhombic Fdd2 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to four equivalent As(1) and four equivalent As(2) atoms. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to four equivalent As(1) and four equivalent As(2) atoms. There are two inequivalent As sites. In the first As site, As(1) is bonded in a 8-coordinate geometry to two equivalent Sr(2), four equivalent Sr(1), one As(1), and one As(2) atom. In the second As site, As(2) is bonded in a 7-coordinate geometry to two equivalent Sr(2), four equivalent Sr(1), and one As(1) atom.
Sr3As4 crystallizes in the orthorhombic Fdd2 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to four equivalent As(1) and four equivalent As(2) atoms. There are a spread of Sr(1)-As(1) bond distances ranging from 3.21-3.29 Å. There are a spread of Sr(1)-As(2) bond distances ranging from 3.18-3.33 Å. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to four equivalent As(1) and four equivalent As(2) atoms. All Sr(2)-As(1) bond lengths are 3.27 Å. There are two shorter (3.16 Å) and two longer (3.33 Å) Sr(2)-As(2) bond lengths. There are two inequivalent As sites. In the first As site, As(1) is bonded in a 8-coordinate geometry to two equivalent Sr(2), four equivalent Sr(1), one As(1), and one As(2) atom. The As(1)-As(1) bond length is 2.56 Å. The As(1)-As(2) bond length is 2.48 Å. In the second As site, As(2) is bonded in a 7-coordinate geometry to two equivalent Sr(2), four equivalent Sr(1), and one As(1) atom.