RbSe is alpha boron-derived structured and crystallizes in the hexagonal P-62m space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 6-coordinate geometry to two equivalent Se(2) and four equivalent Se(1) atoms. In the second Rb site, Rb(2) is bonded in a 6-coordinate geometry to two equivalent Se(2) and four equivalent Se(1) atoms. There are two inequivalent Se sites. In the first Se site, Se(2) is bonded to three equivalent Rb(1), three equivalent Rb(2), and one Se(2) atom to form a mixture of distorted corner, face, and edge-sharing SeRb6Se pentagonal bipyramids. In the second Se site, Se(1) is bonded to three equivalent Rb(1), three equivalent Rb(2), and one Se(1) atom to form a mixture of distorted corner, face, and edge-sharing SeRb6Se pentagonal bipyramids.
RbSe is alpha boron-derived structured and crystallizes in the hexagonal P-62m space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 6-coordinate geometry to two equivalent Se(2) and four equivalent Se(1) atoms. Both Rb(1)-Se(2) bond lengths are 3.51 Å. All Rb(1)-Se(1) bond lengths are 3.43 Å. In the second Rb site, Rb(2) is bonded in a 6-coordinate geometry to two equivalent Se(2) and four equivalent Se(1) atoms. Both Rb(2)-Se(2) bond lengths are 3.50 Å. All Rb(2)-Se(1) bond lengths are 3.59 Å. There are two inequivalent Se sites. In the first Se site, Se(2) is bonded to three equivalent Rb(1), three equivalent Rb(2), and one Se(2) atom to form a mixture of distorted corner, face, and edge-sharing SeRb6Se pentagonal bipyramids. The Se(2)-Se(2) bond length is 2.41 Å. In the second Se site, Se(1) is bonded to three equivalent Rb(1), three equivalent Rb(2), and one Se(1) atom to form a mixture of distorted corner, face, and edge-sharing SeRb6Se pentagonal bipyramids. The Se(1)-Se(1) bond length is 2.42 Å.