NaMg14SiO16 is alpha Po-derived structured and crystallizes in the orthorhombic Pmmm space group. Na(1) is bonded to two equivalent O(2), two equivalent O(5), and two equivalent O(8) atoms to form NaO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Mg(2)O6 octahedra, corners with two equivalent Si(1)O6 octahedra, edges with four equivalent Mg(3)O6 octahedra, edges with four equivalent Mg(6)O6 octahedra, and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. There are seven 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 Si(1)O6 octahedra, edges with four equivalent Mg(4)O6 octahedra, edges with four equivalent Mg(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 Na(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 equivalent Mg(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 Na(1)O6 octahedra, edges with two equivalent Mg(5)O6 octahedra, edges with two equivalent Mg(6)O6 octahedra, edges with two equivalent Si(1)O6 octahedra, and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-16°. 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 0-3°. 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 equivalent Mg(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 Si(1)O6 octahedra, and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. 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 equivalent Mg(6)O6 octahedra, edges with two equivalent Na(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 0-7°. In the seventh 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 Na(1)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Si(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 3-15°. Si(1) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(8) atoms to form SiO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Si(1)O6 octahedra, edges with four equivalent Mg(3)O6 octahedra, edges with four equivalent Mg(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 Si(1) atom to form OMg5Si octahedra that share corners with two equivalent O(2)NaMg5 octahedra, corners with four equivalent O(1)Mg5Si octahedra, edges with two equivalent O(4)Mg4Si2 octahedra, edges with two equivalent O(6)Mg6 octahedra, edges with two equivalent O(9)Mg6 octahedra, edges with two equivalent O(8)NaMg4Si octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the second O site, O(2) is bonded to one Na(1), one Mg(2), two equivalent Mg(6), and two equivalent Mg(7) atoms to form ONaMg5 octahedra that share corners with two equivalent O(1)Mg5Si octahedra, corners with four equivalent O(2)NaMg5 octahedra, edges with two equivalent O(7)Mg6 octahedra, edges with two equivalent O(9)Mg6 octahedra, edges with two equivalent O(5)Na2Mg4 octahedra, edges with two equivalent O(8)NaMg4Si octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-7°. 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(4)Mg4Si2 octahedra,  an edgeedge with one O(6)Mg6 octahedra,  an edgeedge with one O(7)Mg6 octahedra,  an edgeedge with one O(5)Na2Mg4 octahedra, edges with two equivalent O(1)Mg5Si octahedra, edges with two equivalent O(9)Mg6 octahedra, edges with two equivalent O(8)NaMg4Si octahedra, and edges with two equivalent O(2)NaMg5 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the fourth O site, O(4) is bonded to two equivalent Mg(3), two equivalent Mg(5), and two equivalent Si(1) atoms to form OMg4Si2 octahedra that share corners with two equivalent O(4)Mg4Si2 octahedra, corners with two equivalent O(6)Mg6 octahedra, corners with two equivalent O(5)Na2Mg4 octahedra, edges with four equivalent O(1)Mg5Si octahedra, edges with four equivalent O(3)Mg6 octahedra, and edges with four equivalent O(8)NaMg4Si octahedra. The corner-sharing octahedra are not tilted. In the fifth O site, O(5) is bonded to two equivalent Na(1), two equivalent Mg(3), and two equivalent Mg(6) atoms to form ONa2Mg4 octahedra that share corners with two equivalent O(4)Mg4Si2 octahedra, corners with two equivalent O(7)Mg6 octahedra, corners with two equivalent O(5)Na2Mg4 octahedra, edges with four equivalent O(3)Mg6 octahedra, edges with four equivalent O(8)NaMg4Si octahedra, and edges with four equivalent O(2)NaMg5 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 equivalent Mg(5) atoms to form OMg6 octahedra that share corners with two equivalent O(4)Mg4Si2 octahedra, corners with two equivalent O(6)Mg6 octahedra, corners with two equivalent O(7)Mg6 octahedra, edges with four equivalent O(1)Mg5Si 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 equivalent Mg(6) atoms to form OMg6 octahedra that share corners with two equivalent O(6)Mg6 octahedra, corners with two equivalent O(7)Mg6 octahedra, corners with two equivalent O(5)Na2Mg4 octahedra, edges with four equivalent O(3)Mg6 octahedra, edges with four equivalent O(9)Mg6 octahedra, and edges with four equivalent O(2)NaMg5 octahedra. The corner-sharing octahedra are not tilted. In the eighth O site, O(8) is bonded to one Na(1), two equivalent Mg(3), two equivalent Mg(7), and one Si(1) atom to form ONaMg4Si octahedra that share corners with two equivalent O(9)Mg6 octahedra, corners with four equivalent O(8)NaMg4Si octahedra, edges with two equivalent O(4)Mg4Si2 octahedra, edges with two equivalent O(1)Mg5Si octahedra, edges with two equivalent O(5)Na2Mg4 octahedra, edges with two equivalent O(2)NaMg5 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-16°. 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)NaMg4Si octahedra, corners with four equivalent O(9)Mg6 octahedra, edges with two equivalent O(1)Mg5Si octahedra, edges with two equivalent O(6)Mg6 octahedra, edges with two equivalent O(7)Mg6 octahedra, edges with two equivalent O(2)NaMg5 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°.
NaMg14SiO16 is alpha Po-derived structured and crystallizes in the orthorhombic Pmmm space group. Na(1) is bonded to two equivalent O(2), two equivalent O(5), and two equivalent O(8) atoms to form NaO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Mg(2)O6 octahedra, corners with two equivalent Si(1)O6 octahedra, edges with four equivalent Mg(3)O6 octahedra, edges with four equivalent Mg(6)O6 octahedra, and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. Both Na(1)-O(2) bond lengths are 2.26 Å. Both Na(1)-O(5) bond lengths are 2.15 Å. Both Na(1)-O(8) bond lengths are 2.37 Å. There are seven 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 Si(1)O6 octahedra, edges with four equivalent Mg(4)O6 octahedra, edges with four equivalent Mg(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 2.21 Å. Both Mg(1)-O(6) bond lengths are 2.15 Å. Both Mg(1)-O(9) bond lengths are 2.08 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 Na(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 equivalent Mg(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 2.03 Å. Both Mg(2)-O(7) bond lengths are 2.15 Å. Both Mg(2)-O(9) bond lengths are 2.17 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 Na(1)O6 octahedra, edges with two equivalent Mg(5)O6 octahedra, edges with two equivalent Mg(6)O6 octahedra, edges with two equivalent Si(1)O6 octahedra, and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-16°. The Mg(3)-O(4) bond length is 2.18 Å. The Mg(3)-O(5) bond length is 2.07 Å. Both Mg(3)-O(3) bond lengths are 2.13 Å. Both Mg(3)-O(8) bond lengths are 2.17 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 0-3°. The Mg(4)-O(6) bond length is 2.14 Å. The Mg(4)-O(7) bond length is 2.11 Å. Both Mg(4)-O(3) bond lengths are 2.16 Å. Both Mg(4)-O(9) bond lengths are 2.15 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 equivalent Mg(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 Si(1)O6 octahedra, and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. The Mg(5)-O(4) bond length is 2.16 Å. The Mg(5)-O(6) bond length is 2.14 Å. Both Mg(5)-O(1) bond lengths are 2.15 Å. Both Mg(5)-O(3) bond lengths are 2.11 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 equivalent Mg(6)O6 octahedra, edges with two equivalent Na(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 0-7°. The Mg(6)-O(5) bond length is 2.12 Å. The Mg(6)-O(7) bond length is 2.17 Å. Both Mg(6)-O(2) bond lengths are 2.16 Å. Both Mg(6)-O(3) bond lengths are 2.14 Å. In the seventh 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 Na(1)O6 octahedra,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mg(2)O6 octahedra,  an edgeedge with one Si(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 3-15°. The Mg(7)-O(1) bond length is 2.17 Å. The Mg(7)-O(2) bond length is 2.09 Å. The Mg(7)-O(8) bond length is 2.18 Å. The Mg(7)-O(9) bond length is 2.13 Å. Both Mg(7)-O(3) bond lengths are 2.15 Å. Si(1) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(8) atoms to form SiO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Si(1)O6 octahedra, edges with four equivalent Mg(3)O6 octahedra, edges with four equivalent Mg(5)O6 octahedra, and edges with four equivalent Mg(7)O6 octahedra. The corner-sharing octahedra are not tilted. Both Si(1)-O(1) bond lengths are 2.08 Å. Both Si(1)-O(4) bond lengths are 2.15 Å. Both Si(1)-O(8) bond lengths are 1.88 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 Si(1) atom to form OMg5Si octahedra that share corners with two equivalent O(2)NaMg5 octahedra, corners with four equivalent O(1)Mg5Si octahedra, edges with two equivalent O(4)Mg4Si2 octahedra, edges with two equivalent O(6)Mg6 octahedra, edges with two equivalent O(9)Mg6 octahedra, edges with two equivalent O(8)NaMg4Si octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the second O site, O(2) is bonded to one Na(1), one Mg(2), two equivalent Mg(6), and two equivalent Mg(7) atoms to form ONaMg5 octahedra that share corners with two equivalent O(1)Mg5Si octahedra, corners with four equivalent O(2)NaMg5 octahedra, edges with two equivalent O(7)Mg6 octahedra, edges with two equivalent O(9)Mg6 octahedra, edges with two equivalent O(5)Na2Mg4 octahedra, edges with two equivalent O(8)NaMg4Si octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-7°. 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(4)Mg4Si2 octahedra,  an edgeedge with one O(6)Mg6 octahedra,  an edgeedge with one O(7)Mg6 octahedra,  an edgeedge with one O(5)Na2Mg4 octahedra, edges with two equivalent O(1)Mg5Si octahedra, edges with two equivalent O(9)Mg6 octahedra, edges with two equivalent O(8)NaMg4Si octahedra, and edges with two equivalent O(2)NaMg5 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the fourth O site, O(4) is bonded to two equivalent Mg(3), two equivalent Mg(5), and two equivalent Si(1) atoms to form OMg4Si2 octahedra that share corners with two equivalent O(4)Mg4Si2 octahedra, corners with two equivalent O(6)Mg6 octahedra, corners with two equivalent O(5)Na2Mg4 octahedra, edges with four equivalent O(1)Mg5Si octahedra, edges with four equivalent O(3)Mg6 octahedra, and edges with four equivalent O(8)NaMg4Si octahedra. The corner-sharing octahedra are not tilted. In the fifth O site, O(5) is bonded to two equivalent Na(1), two equivalent Mg(3), and two equivalent Mg(6) atoms to form ONa2Mg4 octahedra that share corners with two equivalent O(4)Mg4Si2 octahedra, corners with two equivalent O(7)Mg6 octahedra, corners with two equivalent O(5)Na2Mg4 octahedra, edges with four equivalent O(3)Mg6 octahedra, edges with four equivalent O(8)NaMg4Si octahedra, and edges with four equivalent O(2)NaMg5 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 equivalent Mg(5) atoms to form OMg6 octahedra that share corners with two equivalent O(4)Mg4Si2 octahedra, corners with two equivalent O(6)Mg6 octahedra, corners with two equivalent O(7)Mg6 octahedra, edges with four equivalent O(1)Mg5Si 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 equivalent Mg(6) atoms to form OMg6 octahedra that share corners with two equivalent O(6)Mg6 octahedra, corners with two equivalent O(7)Mg6 octahedra, corners with two equivalent O(5)Na2Mg4 octahedra, edges with four equivalent O(3)Mg6 octahedra, edges with four equivalent O(9)Mg6 octahedra, and edges with four equivalent O(2)NaMg5 octahedra. The corner-sharing octahedra are not tilted. In the eighth O site, O(8) is bonded to one Na(1), two equivalent Mg(3), two equivalent Mg(7), and one Si(1) atom to form ONaMg4Si octahedra that share corners with two equivalent O(9)Mg6 octahedra, corners with four equivalent O(8)NaMg4Si octahedra, edges with two equivalent O(4)Mg4Si2 octahedra, edges with two equivalent O(1)Mg5Si octahedra, edges with two equivalent O(5)Na2Mg4 octahedra, edges with two equivalent O(2)NaMg5 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-16°. 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)NaMg4Si octahedra, corners with four equivalent O(9)Mg6 octahedra, edges with two equivalent O(1)Mg5Si octahedra, edges with two equivalent O(6)Mg6 octahedra, edges with two equivalent O(7)Mg6 octahedra, edges with two equivalent O(2)NaMg5 octahedra, and edges with four equivalent O(3)Mg6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°.