CsMg14LaO16 is Caswellsilverite-derived structured and crystallizes in the orthorhombic Pmmm space group. Cs(1) is bonded to two equivalent O(2), two equivalent O(5), and two equivalent O(8) atoms to form CsO6 octahedra that share corners with two equivalent Cs(1)O6 octahedra; corners with two equivalent Mg(2)O6 octahedra; corners with two equivalent La(1)O6 octahedra; edges with four equivalent Mg(3)O6 octahedra; edges with four Mg(6,6)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. There are nine inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent O(1), two equivalent O(6), and two equivalent O(9) atoms to form MgO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra; corners with two equivalent Mg(2)O6 octahedra; corners with two equivalent La(1)O6 octahedra; edges with four equivalent Mg(4)O6 octahedra; edges with four Mg(5,5)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. In the second Mg site, Mg(2) is bonded to two equivalent O(2), two equivalent O(7), and two equivalent O(9) atoms to form MgO6 octahedra that share corners with two equivalent Cs(1)O6 octahedra; corners with two equivalent Mg(1)O6 octahedra; corners with two equivalent Mg(2)O6 octahedra; edges with four equivalent Mg(4)O6 octahedra; edges with four Mg(6,6)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. In the third Mg site, Mg(3) is bonded to one O(4), one O(5), two equivalent O(3), and two equivalent O(8) atoms to form MgO6 octahedra that share corners with two equivalent Mg(4)O6 octahedra; corners with four equivalent Mg(3)O6 octahedra; edges with two equivalent Cs(1)O6 octahedra; edges with two Mg(5,5)O6 octahedra; edges with two Mg(6,6)O6 octahedra; edges with two equivalent La(1)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-11°. In the fourth Mg site, Mg(4) is bonded to one O(6), one O(7), two equivalent O(3), and two equivalent O(9) atoms to form a mixture of corner and edge-sharing MgO6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the fifth Mg site, Mg(5) is bonded to one O(4), one O(6), two equivalent O(1), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(6)O6 octahedra; corners with four Mg(5,5)O6 octahedra; edges with two equivalent Mg(1)O6 octahedra; edges with two equivalent Mg(3)O6 octahedra; edges with two equivalent Mg(4)O6 octahedra; edges with two equivalent La(1)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-7°. In the sixth Mg site, Mg(6) is bonded to one O(5), one O(7), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(5)O6 octahedra; corners with four Mg(6,6)O6 octahedra; edges with two equivalent Cs(1)O6 octahedra; edges with two equivalent Mg(2)O6 octahedra; edges with two equivalent Mg(3)O6 octahedra; edges with two equivalent Mg(4)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the seventh Mg site, Mg(5) is bonded to one O(4), one O(6), two equivalent O(1), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(6)O6 octahedra; corners with four Mg(5,5)O6 octahedra; edges with two equivalent Mg(1)O6 octahedra; edges with two equivalent Mg(3)O6 octahedra; edges with two equivalent Mg(4)O6 octahedra; edges with two equivalent La(1)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-7°. In the eighth Mg site, Mg(6) is bonded to one O(5), one O(7), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(5)O6 octahedra; corners with four Mg(6,6)O6 octahedra; edges with two equivalent Cs(1)O6 octahedra; edges with two equivalent Mg(2)O6 octahedra; edges with two equivalent Mg(3)O6 octahedra; edges with two equivalent Mg(4)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the ninth Mg site, Mg(7) is bonded to one O(1), one O(2), one O(8), one O(9), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with six equivalent Mg(7)O6 octahedra,  an edgeedge with one Cs(1)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one La(1)O6 octahedra, edges with two equivalent Mg(3)O6 octahedra, edges with two equivalent Mg(4)O6 octahedra, edges with two equivalent Mg(5)O6 octahedra, and edges with two equivalent Mg(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-10°. La(1) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(8) atoms to form LaO6 octahedra that share corners with two equivalent Cs(1)O6 octahedra; corners with two equivalent Mg(1)O6 octahedra; corners with two equivalent La(1)O6 octahedra; edges with four equivalent Mg(3)O6 octahedra; edges with four Mg(5,5)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. There are nine inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), two equivalent Mg(5), two equivalent Mg(7), and one La(1) atom to form OLaMg5 octahedra that share corners with two equivalent O(2)CsMg5 octahedra, corners with four equivalent O(1)LaMg5 octahedra, edges with two equivalent O(8)CsLaMg4 octahedra, edges with two equivalent O(4)La2Mg4 octahedra, edges with two equivalent O(6)Mg6 octahedra, edges with two equivalent O(9)Mg6 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. In the second O site, O(2) is bonded to one Cs(1), one Mg(2), two equivalent Mg(6), and two equivalent Mg(7) atoms to form distorted OCsMg5 octahedra that share corners with two equivalent O(1)LaMg5 octahedra, corners with four equivalent O(2)CsMg5 octahedra, edges with two equivalent O(5)Cs2Mg4 octahedra, edges with two equivalent O(8)CsLaMg4 octahedra, edges with two equivalent O(7)Mg6 octahedra, edges with two equivalent O(9)Mg6 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the third O site, O(3) is bonded to one Mg(3), one Mg(4), one Mg(5), one Mg(6), and two equivalent Mg(7) atoms to form OMg6 octahedra that share corners with six equivalent O(3)Mg6 octahedra,  an edgeedge with one O(5)Cs2Mg4 octahedra,  an edgeedge with one O(4)La2Mg4 octahedra,  an edgeedge with one O(6)Mg6 octahedra,  an edgeedge with one O(7)Mg6 octahedra, edges with two equivalent O(8)CsLaMg4 octahedra, edges with two equivalent O(2)CsMg5 octahedra, edges with two equivalent O(1)LaMg5 octahedra, and edges with two equivalent O(9)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 1-7°. In the fourth O site, O(4) is bonded to two equivalent Mg(3); two Mg(5,5); and two equivalent La(1) atoms to form OLa2Mg4 octahedra that share corners with two equivalent O(5)Cs2Mg4 octahedra, corners with two equivalent O(4)La2Mg4 octahedra, corners with two equivalent O(6)Mg6 octahedra, edges with four equivalent O(8)CsLaMg4 octahedra, edges with four equivalent O(1)LaMg5 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the fifth O site, O(5) is bonded to two equivalent Cs(1); two equivalent Mg(3); and two Mg(6,6) atoms to form OCs2Mg4 octahedra that share corners with two equivalent O(5)Cs2Mg4 octahedra, corners with two equivalent O(4)La2Mg4 octahedra, corners with two equivalent O(7)Mg6 octahedra, edges with four equivalent O(8)CsLaMg4 octahedra, edges with four equivalent O(2)CsMg5 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the sixth O site, O(6) is bonded to two equivalent Mg(1); two equivalent Mg(4); and two Mg(5,5) atoms to form OMg6 octahedra that share corners with two equivalent O(4)La2Mg4 octahedra, corners with two equivalent O(6)Mg6 octahedra, corners with two equivalent O(7)Mg6 octahedra, edges with four equivalent O(1)LaMg5 octahedra, edges with four equivalent O(3)Mg6 octahedra, and edges with four equivalent O(9)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the seventh O site, O(7) is bonded to two equivalent Mg(2); two equivalent Mg(4); and two Mg(6,6) atoms to form OMg6 octahedra that share corners with two equivalent O(5)Cs2Mg4 octahedra, corners with two equivalent O(6)Mg6 octahedra, corners with two equivalent O(7)Mg6 octahedra, edges with four equivalent O(2)CsMg5 octahedra, edges with four equivalent O(3)Mg6 octahedra, and edges with four equivalent O(9)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the eighth O site, O(8) is bonded to one Cs(1), two equivalent Mg(3), two equivalent Mg(7), and one La(1) atom to form OCsLaMg4 octahedra that share corners with two equivalent O(9)Mg6 octahedra, corners with four equivalent O(8)CsLaMg4 octahedra, edges with two equivalent O(5)Cs2Mg4 octahedra, edges with two equivalent O(2)CsMg5 octahedra, edges with two equivalent O(4)La2Mg4 octahedra, edges with two equivalent O(1)LaMg5 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-11°. In the ninth O site, O(9) is bonded to one Mg(1), one Mg(2), two equivalent Mg(4), and two equivalent Mg(7) atoms to form OMg6 octahedra that share corners with two equivalent O(8)CsLaMg4 octahedra, corners with four equivalent O(9)Mg6 octahedra, edges with two equivalent O(2)CsMg5 octahedra, edges with two equivalent O(1)LaMg5 octahedra, edges with two equivalent O(6)Mg6 octahedra, edges with two equivalent O(7)Mg6 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-8°.
CsMg14LaO16 is Caswellsilverite-derived structured and crystallizes in the orthorhombic Pmmm space group. Cs(1) is bonded to two equivalent O(2), two equivalent O(5), and two equivalent O(8) atoms to form CsO6 octahedra that share corners with two equivalent Cs(1)O6 octahedra; corners with two equivalent Mg(2)O6 octahedra; corners with two equivalent La(1)O6 octahedra; edges with four equivalent Mg(3)O6 octahedra; edges with four Mg(6,6)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. Both Cs(1)-O(2) bond lengths are 2.57 Å. Both Cs(1)-O(5) bond lengths are 2.29 Å. Both Cs(1)-O(8) bond lengths are 2.44 Å. There are nine inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent O(1), two equivalent O(6), and two equivalent O(9) atoms to form MgO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra; corners with two equivalent Mg(2)O6 octahedra; corners with two equivalent La(1)O6 octahedra; edges with four equivalent Mg(4)O6 octahedra; edges with four Mg(5,5)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. Both Mg(1)-O(1) bond lengths are 2.02 Å. Both Mg(1)-O(6) bond lengths are 2.29 Å. Both Mg(1)-O(9) bond lengths are 2.25 Å. In the second Mg site, Mg(2) is bonded to two equivalent O(2), two equivalent O(7), and two equivalent O(9) atoms to form MgO6 octahedra that share corners with two equivalent Cs(1)O6 octahedra; corners with two equivalent Mg(1)O6 octahedra; corners with two equivalent Mg(2)O6 octahedra; edges with four equivalent Mg(4)O6 octahedra; edges with four Mg(6,6)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. Both Mg(2)-O(2) bond lengths are 1.89 Å. Both Mg(2)-O(7) bond lengths are 2.29 Å. Both Mg(2)-O(9) bond lengths are 2.35 Å. In the third Mg site, Mg(3) is bonded to one O(4), one O(5), two equivalent O(3), and two equivalent O(8) atoms to form MgO6 octahedra that share corners with two equivalent Mg(4)O6 octahedra; corners with four equivalent Mg(3)O6 octahedra; edges with two equivalent Cs(1)O6 octahedra; edges with two Mg(5,5)O6 octahedra; edges with two Mg(6,6)O6 octahedra; edges with two equivalent La(1)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-11°. The Mg(3)-O(4) bond length is 2.39 Å. The Mg(3)-O(5) bond length is 2.21 Å. Both Mg(3)-O(3) bond lengths are 2.25 Å. Both Mg(3)-O(8) bond lengths are 2.30 Å. In the fourth Mg site, Mg(4) is bonded to one O(6), one O(7), two equivalent O(3), and two equivalent O(9) atoms to form a mixture of corner and edge-sharing MgO6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. The Mg(4)-O(6) bond length is 2.32 Å. The Mg(4)-O(7) bond length is 2.28 Å. Both Mg(4)-O(3) bond lengths are 2.21 Å. Both Mg(4)-O(9) bond lengths are 2.29 Å. In the fifth Mg site, Mg(5) is bonded to one O(4), one O(6), two equivalent O(1), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(6)O6 octahedra; corners with four Mg(5,5)O6 octahedra; edges with two equivalent Mg(1)O6 octahedra; edges with two equivalent Mg(3)O6 octahedra; edges with two equivalent Mg(4)O6 octahedra; edges with two equivalent La(1)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-7°. The Mg(5)-O(4) bond length is 2.40 Å. The Mg(5)-O(6) bond length is 2.06 Å. Both Mg(5)-O(1) bond lengths are 2.29 Å. Both Mg(5)-O(3) bond lengths are 2.32 Å. In the sixth Mg site, Mg(6) is bonded to one O(5), one O(7), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(5)O6 octahedra; corners with four Mg(6,6)O6 octahedra; edges with two equivalent Cs(1)O6 octahedra; edges with two equivalent Mg(2)O6 octahedra; edges with two equivalent Mg(3)O6 octahedra; edges with two equivalent Mg(4)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. The Mg(6)-O(5) bond length is 2.37 Å. The Mg(6)-O(7) bond length is 2.08 Å. Both Mg(6)-O(2) bond lengths are 2.30 Å. Both Mg(6)-O(3) bond lengths are 2.30 Å. In the seventh Mg site, Mg(5) is bonded to one O(4), one O(6), two equivalent O(1), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(6)O6 octahedra; corners with four Mg(5,5)O6 octahedra; edges with two equivalent Mg(1)O6 octahedra; edges with two equivalent Mg(3)O6 octahedra; edges with two equivalent Mg(4)O6 octahedra; edges with two equivalent La(1)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-7°. The Mg(5)-O(4) bond length is 2.40 Å. The Mg(5)-O(6) bond length is 2.06 Å. Both Mg(5)-O(1) bond lengths are 2.29 Å. Both Mg(5)-O(3) bond lengths are 2.32 Å. In the eighth Mg site, Mg(6) is bonded to one O(5), one O(7), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mg(5)O6 octahedra; corners with four Mg(6,6)O6 octahedra; edges with two equivalent Cs(1)O6 octahedra; edges with two equivalent Mg(2)O6 octahedra; edges with two equivalent Mg(3)O6 octahedra; edges with two equivalent Mg(4)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. The Mg(6)-O(5) bond length is 2.37 Å. The Mg(6)-O(7) bond length is 2.08 Å. Both Mg(6)-O(2) bond lengths are 2.30 Å. Both Mg(6)-O(3) bond lengths are 2.30 Å. In the ninth Mg site, Mg(7) is bonded to one O(1), one O(2), one O(8), one O(9), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with six equivalent Mg(7)O6 octahedra,  an edgeedge with one Cs(1)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one La(1)O6 octahedra, edges with two equivalent Mg(3)O6 octahedra, edges with two equivalent Mg(4)O6 octahedra, edges with two equivalent Mg(5)O6 octahedra, and edges with two equivalent Mg(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-10°. The Mg(7)-O(1) bond length is 2.37 Å. The Mg(7)-O(2) bond length is 2.24 Å. The Mg(7)-O(8) bond length is 2.38 Å. The Mg(7)-O(9) bond length is 2.08 Å. Both Mg(7)-O(3) bond lengths are 2.29 Å. La(1) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(8) atoms to form LaO6 octahedra that share corners with two equivalent Cs(1)O6 octahedra; corners with two equivalent Mg(1)O6 octahedra; corners with two equivalent La(1)O6 octahedra; edges with four equivalent Mg(3)O6 octahedra; edges with four Mg(5,5)O6 octahedra; and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. Both La(1)-O(1) bond lengths are 2.44 Å. Both La(1)-O(4) bond lengths are 2.29 Å. Both La(1)-O(8) bond lengths are 2.16 Å. There are nine inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), two equivalent Mg(5), two equivalent Mg(7), and one La(1) atom to form OLaMg5 octahedra that share corners with two equivalent O(2)CsMg5 octahedra, corners with four equivalent O(1)LaMg5 octahedra, edges with two equivalent O(8)CsLaMg4 octahedra, edges with two equivalent O(4)La2Mg4 octahedra, edges with two equivalent O(6)Mg6 octahedra, edges with two equivalent O(9)Mg6 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. In the second O site, O(2) is bonded to one Cs(1), one Mg(2), two equivalent Mg(6), and two equivalent Mg(7) atoms to form distorted OCsMg5 octahedra that share corners with two equivalent O(1)LaMg5 octahedra, corners with four equivalent O(2)CsMg5 octahedra, edges with two equivalent O(5)Cs2Mg4 octahedra, edges with two equivalent O(8)CsLaMg4 octahedra, edges with two equivalent O(7)Mg6 octahedra, edges with two equivalent O(9)Mg6 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the third O site, O(3) is bonded to one Mg(3), one Mg(4), one Mg(5), one Mg(6), and two equivalent Mg(7) atoms to form OMg6 octahedra that share corners with six equivalent O(3)Mg6 octahedra,  an edgeedge with one O(5)Cs2Mg4 octahedra,  an edgeedge with one O(4)La2Mg4 octahedra,  an edgeedge with one O(6)Mg6 octahedra,  an edgeedge with one O(7)Mg6 octahedra, edges with two equivalent O(8)CsLaMg4 octahedra, edges with two equivalent O(2)CsMg5 octahedra, edges with two equivalent O(1)LaMg5 octahedra, and edges with two equivalent O(9)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 1-7°. In the fourth O site, O(4) is bonded to two equivalent Mg(3); two Mg(5,5); and two equivalent La(1) atoms to form OLa2Mg4 octahedra that share corners with two equivalent O(5)Cs2Mg4 octahedra, corners with two equivalent O(4)La2Mg4 octahedra, corners with two equivalent O(6)Mg6 octahedra, edges with four equivalent O(8)CsLaMg4 octahedra, edges with four equivalent O(1)LaMg5 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the fifth O site, O(5) is bonded to two equivalent Cs(1); two equivalent Mg(3); and two Mg(6,6) atoms to form OCs2Mg4 octahedra that share corners with two equivalent O(5)Cs2Mg4 octahedra, corners with two equivalent O(4)La2Mg4 octahedra, corners with two equivalent O(7)Mg6 octahedra, edges with four equivalent O(8)CsLaMg4 octahedra, edges with four equivalent O(2)CsMg5 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the sixth O site, O(6) is bonded to two equivalent Mg(1); two equivalent Mg(4); and two Mg(5,5) atoms to form OMg6 octahedra that share corners with two equivalent O(4)La2Mg4 octahedra, corners with two equivalent O(6)Mg6 octahedra, corners with two equivalent O(7)Mg6 octahedra, edges with four equivalent O(1)LaMg5 octahedra, edges with four equivalent O(3)Mg6 octahedra, and edges with four equivalent O(9)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the seventh O site, O(7) is bonded to two equivalent Mg(2); two equivalent Mg(4); and two Mg(6,6) atoms to form OMg6 octahedra that share corners with two equivalent O(5)Cs2Mg4 octahedra, corners with two equivalent O(6)Mg6 octahedra, corners with two equivalent O(7)Mg6 octahedra, edges with four equivalent O(2)CsMg5 octahedra, edges with four equivalent O(3)Mg6 octahedra, and edges with four equivalent O(9)Mg6 octahedra. The corner-sharing octahedra are not tilted. In the eighth O site, O(8) is bonded to one Cs(1), two equivalent Mg(3), two equivalent Mg(7), and one La(1) atom to form OCsLaMg4 octahedra that share corners with two equivalent O(9)Mg6 octahedra, corners with four equivalent O(8)CsLaMg4 octahedra, edges with two equivalent O(5)Cs2Mg4 octahedra, edges with two equivalent O(2)CsMg5 octahedra, edges with two equivalent O(4)La2Mg4 octahedra, edges with two equivalent O(1)LaMg5 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-11°. In the ninth O site, O(9) is bonded to one Mg(1), one Mg(2), two equivalent Mg(4), and two equivalent Mg(7) atoms to form OMg6 octahedra that share corners with two equivalent O(8)CsLaMg4 octahedra, corners with four equivalent O(9)Mg6 octahedra, edges with two equivalent O(2)CsMg5 octahedra, edges with two equivalent O(1)LaMg5 octahedra, edges with two equivalent O(6)Mg6 octahedra, edges with two equivalent O(7)Mg6 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-8°.