RbEuAsS3 crystallizes in the monoclinic P2_1/c space group. Rb(1) is bonded in a 10-coordinate geometry to two equivalent As(1), one S(1), three equivalent S(2), and four equivalent S(3) atoms. Eu(1) is bonded in a 7-coordinate geometry to one S(3), two equivalent S(2), and four equivalent S(1) atoms. As(1) is bonded in a 3-coordinate geometry to two equivalent Rb(1), one S(1), one S(2), and one S(3) atom. There are three inequivalent S sites. In the first S site, S(1) is bonded to one Rb(1), four equivalent Eu(1), and one As(1) atom to form a mixture of distorted corner and edge-sharing SRbEu4As octahedra. The corner-sharing octahedral tilt angles range from 23-31°. In the second S site, S(2) is bonded in a 6-coordinate geometry to three equivalent Rb(1), two equivalent Eu(1), and one As(1) atom. In the third S site, S(3) is bonded in a 2-coordinate geometry to four equivalent Rb(1), one Eu(1), and one As(1) atom.
RbEuAsS3 crystallizes in the monoclinic P2_1/c space group. Rb(1) is bonded in a 10-coordinate geometry to two equivalent As(1), one S(1), three equivalent S(2), and four equivalent S(3) atoms. There is one shorter (3.66 Å) and one longer (3.82 Å) Rb(1)-As(1) bond length. The Rb(1)-S(1) bond length is 3.66 Å. There are a spread of Rb(1)-S(2) bond distances ranging from 3.42-3.69 Å. There are a spread of Rb(1)-S(3) bond distances ranging from 3.57-3.73 Å. Eu(1) is bonded in a 7-coordinate geometry to one S(3), two equivalent S(2), and four equivalent S(1) atoms. The Eu(1)-S(3) bond length is 2.95 Å. Both Eu(1)-S(2) bond lengths are 3.04 Å. There are a spread of Eu(1)-S(1) bond distances ranging from 3.06-3.26 Å. As(1) is bonded in a 3-coordinate geometry to two equivalent Rb(1), one S(1), one S(2), and one S(3) atom. The As(1)-S(1) bond length is 2.31 Å. The As(1)-S(2) bond length is 2.28 Å. The As(1)-S(3) bond length is 2.27 Å. There are three inequivalent S sites. In the first S site, S(1) is bonded to one Rb(1), four equivalent Eu(1), and one As(1) atom to form a mixture of distorted corner and edge-sharing SRbEu4As octahedra. The corner-sharing octahedral tilt angles range from 23-31°. In the second S site, S(2) is bonded in a 6-coordinate geometry to three equivalent Rb(1), two equivalent Eu(1), and one As(1) atom. In the third S site, S(3) is bonded in a 2-coordinate geometry to four equivalent Rb(1), one Eu(1), and one As(1) atom.