RbNa3H4 is Caswellsilverite-like structured and crystallizes in the cubic Pm-3m space group. Rb(1) is bonded to six H(1,1) atoms to form RbH6 octahedra that share corners with six equivalent Rb(1)H6 octahedra and edges with twelve equivalent Na(1)H6 octahedra. The corner-sharing octahedra are not tilted. Na(1) is bonded to two equivalent H(2) and four equivalent H(1) atoms to form NaH6 octahedra that share corners with six equivalent Na(1)H6 octahedra, edges with four equivalent Rb(1)H6 octahedra, and edges with eight equivalent Na(1)H6 octahedra. The corner-sharing octahedra are not tilted. There are three inequivalent H sites. In the first H site, H(1) is bonded to two equivalent Rb(1) and four equivalent Na(1) atoms to form HRb2Na4 octahedra that share corners with six equivalent H(1)Rb2Na4 octahedra, edges with four equivalent H(2)Na6 octahedra, and edges with eight equivalent H(1)Rb2Na4 octahedra. The corner-sharing octahedra are not tilted. In the second H site, H(1) is bonded to two equivalent Rb(1) and four equivalent Na(1) atoms to form HRb2Na4 octahedra that share corners with six equivalent H(1)Rb2Na4 octahedra; edges with four equivalent H(2)Na6 octahedra; and edges with eight H(1,1)Rb2Na4 octahedra. The corner-sharing octahedra are not tilted. In the third H site, H(2) is bonded to six equivalent Na(1) atoms to form HNa6 octahedra that share corners with six equivalent H(2)Na6 octahedra and edges with twelve H(1,1)Rb2Na4 octahedra. The corner-sharing octahedra are not tilted.
RbNa3H4 is Caswellsilverite-like structured and crystallizes in the cubic Pm-3m space group. Rb(1) is bonded to six H(1,1) atoms to form RbH6 octahedra that share corners with six equivalent Rb(1)H6 octahedra and edges with twelve equivalent Na(1)H6 octahedra. The corner-sharing octahedra are not tilted. All Rb(1)-H(1,1) bond lengths are 2.64 Å. Na(1) is bonded to two equivalent H(2) and four equivalent H(1) atoms to form NaH6 octahedra that share corners with six equivalent Na(1)H6 octahedra, edges with four equivalent Rb(1)H6 octahedra, and edges with eight equivalent Na(1)H6 octahedra. The corner-sharing octahedra are not tilted. Both Na(1)-H(2) bond lengths are 2.64 Å. All Na(1)-H(1) bond lengths are 2.64 Å. There are three inequivalent H sites. In the first H site, H(1) is bonded to two equivalent Rb(1) and four equivalent Na(1) atoms to form HRb2Na4 octahedra that share corners with six equivalent H(1)Rb2Na4 octahedra, edges with four equivalent H(2)Na6 octahedra, and edges with eight equivalent H(1)Rb2Na4 octahedra. The corner-sharing octahedra are not tilted. All H(1)-Na(1) bond lengths are 2.64 Å. In the second H site, H(1) is bonded to two equivalent Rb(1) and four equivalent Na(1) atoms to form HRb2Na4 octahedra that share corners with six equivalent H(1)Rb2Na4 octahedra; edges with four equivalent H(2)Na6 octahedra; and edges with eight H(1,1)Rb2Na4 octahedra. The corner-sharing octahedra are not tilted. In the third H site, H(2) is bonded to six equivalent Na(1) atoms to form HNa6 octahedra that share corners with six equivalent H(2)Na6 octahedra and edges with twelve H(1,1)Rb2Na4 octahedra. The corner-sharing octahedra are not tilted.