Cs3As crystallizes in the hexagonal P6_3cm space group. There are four inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a 2-coordinate geometry to four equivalent As(1) atoms. In the second Cs site, Cs(2) is bonded in a distorted trigonal planar geometry to three equivalent As(1) atoms. In the third Cs site, Cs(3) is bonded in a trigonal non-coplanar geometry to three equivalent As(1) atoms. In the fourth Cs site, Cs(4) is bonded in a distorted trigonal planar geometry to three equivalent As(1) atoms. As(1) is bonded in a 10-coordinate geometry to one Cs(3), two equivalent Cs(4), three equivalent Cs(2), and four equivalent Cs(1) atoms.
Cs3As crystallizes in the hexagonal P6_3cm space group. There are four inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a 2-coordinate geometry to four equivalent As(1) atoms. There are a spread of Cs(1)-As(1) bond distances ranging from 3.77-4.24 Å. In the second Cs site, Cs(2) is bonded in a distorted trigonal planar geometry to three equivalent As(1) atoms. There is one shorter (3.79 Å) and two longer (3.85 Å) Cs(2)-As(1) bond lengths. In the third Cs site, Cs(3) is bonded in a trigonal non-coplanar geometry to three equivalent As(1) atoms. All Cs(3)-As(1) bond lengths are 3.67 Å. In the fourth Cs site, Cs(4) is bonded in a distorted trigonal planar geometry to three equivalent As(1) atoms. All Cs(4)-As(1) bond lengths are 3.71 Å. As(1) is bonded in a 10-coordinate geometry to one Cs(3), two equivalent Cs(4), three equivalent Cs(2), and four equivalent Cs(1) atoms.