RbAs is Magnesium tetraboride-like structured and crystallizes in the orthorhombic P2_12_12_1 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 6-coordinate geometry to three equivalent As(1) and three equivalent As(2) atoms. In the second Rb site, Rb(2) is bonded in a 5-coordinate geometry to two equivalent As(1) and three equivalent As(2) atoms. There are two inequivalent As sites. In the first As site, As(1) is bonded in a 7-coordinate geometry to two equivalent Rb(2), three equivalent Rb(1), and two equivalent As(2) atoms. In the second As site, As(2) is bonded in a 8-coordinate geometry to three equivalent Rb(1), three equivalent Rb(2), and two equivalent As(1) atoms.
RbAs is Magnesium tetraboride-like structured and crystallizes in the orthorhombic P2_12_12_1 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 6-coordinate geometry to three equivalent As(1) and three equivalent As(2) atoms. There are a spread of Rb(1)-As(1) bond distances ranging from 3.45-3.83 Å. There are a spread of Rb(1)-As(2) bond distances ranging from 3.52-3.65 Å. In the second Rb site, Rb(2) is bonded in a 5-coordinate geometry to two equivalent As(1) and three equivalent As(2) atoms. There is one shorter (3.57 Å) and one longer (3.58 Å) Rb(2)-As(1) bond length. There are two shorter (3.42 Å) and one longer (3.50 Å) Rb(2)-As(2) bond length. There are two inequivalent As sites. In the first As site, As(1) is bonded in a 7-coordinate geometry to two equivalent Rb(2), three equivalent Rb(1), and two equivalent As(2) atoms. There is one shorter (2.49 Å) and one longer (2.51 Å) As(1)-As(2) bond length. In the second As site, As(2) is bonded in a 8-coordinate geometry to three equivalent Rb(1), three equivalent Rb(2), and two equivalent As(1) atoms.