RbMgCO3F crystallizes in the hexagonal P-62m space group. Rb(1) is bonded in a 13-coordinate geometry to two equivalent O(2), eight equivalent O(1), and three equivalent F(1) atoms. Mg(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent F(1) atoms to form corner-sharing MgO4F2 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. There are two inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to three equivalent O(1) atoms. In the second C site, C(2) is bonded in a trigonal planar geometry to three equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to four equivalent Rb(1), one Mg(1), and one C(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to two equivalent Rb(1), two equivalent Mg(1), and one C(2) atom. F(1) is bonded in a linear geometry to three equivalent Rb(1) and two equivalent Mg(1) atoms.
RbMgCO3F crystallizes in the hexagonal P-62m space group. Rb(1) is bonded in a 13-coordinate geometry to two equivalent O(2), eight equivalent O(1), and three equivalent F(1) atoms. Both Rb(1)-O(2) bond lengths are 2.99 Å. There are four shorter (3.16 Å) and four longer (3.23 Å) Rb(1)-O(1) bond lengths. There is one shorter (3.11 Å) and two longer (3.14 Å) Rb(1)-F(1) bond lengths. Mg(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent F(1) atoms to form corner-sharing MgO4F2 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. Both Mg(1)-O(1) bond lengths are 2.03 Å. Both Mg(1)-O(2) bond lengths are 2.23 Å. Both Mg(1)-F(1) bond lengths are 2.01 Å. There are two inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to three equivalent O(1) atoms. All C(1)-O(1) bond lengths are 1.30 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to three equivalent O(2) atoms. All C(2)-O(2) bond lengths are 1.30 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to four equivalent Rb(1), one Mg(1), and one C(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to two equivalent Rb(1), two equivalent Mg(1), and one C(2) atom. F(1) is bonded in a linear geometry to three equivalent Rb(1) and two equivalent Mg(1) atoms.