NaFe9B3Si6H2O31 crystallizes in the triclinic P1 space group. Na(1) is bonded in a 9-coordinate geometry to one O(1), one O(12), one O(20), one O(21), one O(27), one O(28), one O(31), one O(6), and one O(7) atom. There are nine inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(10), one O(13), one O(19), one O(3), one O(4), and one O(8) atom to form FeO6 octahedra that share  a cornercorner with one Fe(6)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra,  an edgeedge with one Fe(4)O6 octahedra,  an edgeedge with one Fe(5)O6 octahedra, and  an edgeedge with one Fe(8)O6 octahedra. The corner-sharing octahedral tilt angles are 51°. In the second Fe site, Fe(2) is bonded to one O(11), one O(14), one O(18), one O(2), one O(5), and one O(9) atom to form FeO6 octahedra that share  a cornercorner with one Fe(5)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra,  an edgeedge with one Fe(3)O6 octahedra,  an edgeedge with one Fe(6)O6 octahedra, and  an edgeedge with one Fe(9)O6 octahedra. The corner-sharing octahedral tilt angles are 54°. In the third Fe site, Fe(3) is bonded to one O(11), one O(12), one O(16), one O(17), one O(21), and one O(9) atom to form FeO6 octahedra that share  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra,  an edgeedge with one Fe(2)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra,  an edgeedge with one Fe(5)O6 octahedra, and  an edgeedge with one Fe(7)O6 octahedra. In the fourth Fe site, Fe(4) is bonded to one O(10), one O(12), one O(15), one O(17), one O(20), and one O(8) atom to form FeO6 octahedra that share  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(3)O6 octahedra,  an edgeedge with one Fe(6)O6 octahedra, and  an edgeedge with one Fe(7)O6 octahedra. In the fifth Fe site, Fe(5) is bonded to one O(11), one O(13), one O(16), one O(19), one O(23), and one O(29) atom to form FeO6 octahedra that share  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(3)O6 octahedra, and  an edgeedge with one Fe(8)O6 octahedra. The corner-sharing octahedral tilt angles are 54°. In the sixth Fe site, Fe(6) is bonded to one O(10), one O(14), one O(15), one O(18), one O(22), and one O(30) atom to form FeO6 octahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra,  an edgeedge with one Fe(2)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra, and  an edgeedge with one Fe(9)O6 octahedra. The corner-sharing octahedral tilt angles are 51°. In the seventh Fe site, Fe(7) is bonded to one O(17), one O(20), one O(21), one O(24), one O(25), and one O(26) atom to form FeO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  an edgeedge with one Fe(3)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra,  an edgeedge with one Fe(8)O6 octahedra, and  an edgeedge with one Fe(9)O6 octahedra. In the eighth Fe site, Fe(8) is bonded to one O(23), one O(25), one O(26), one O(29), one O(3), and one O(4) atom to form FeO6 octahedra that share  a cornercorner with one Fe(9)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(5)O6 octahedra, and  an edgeedge with one Fe(7)O6 octahedra. The corner-sharing octahedral tilt angles are 52°. In the ninth Fe site, Fe(9) is bonded to one O(2), one O(22), one O(24), one O(26), one O(30), and one O(5) atom to form FeO6 octahedra that share  a cornercorner with one Fe(8)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra,  an edgeedge with one Fe(2)O6 octahedra,  an edgeedge with one Fe(6)O6 octahedra, and  an edgeedge with one Fe(7)O6 octahedra. The corner-sharing octahedral tilt angles are 52°. There are three inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(12), one O(4), and one O(5) atom. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(19), one O(21), and one O(22) atom. In the third B site, B(3) is bonded in a trigonal planar geometry to one O(18), one O(20), and one O(23) atom. There are six inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(14), one O(24), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(6)O6 octahedra,  a cornercorner with one Fe(7)O6 octahedra,  a cornercorner with one Fe(9)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra, and  a cornercorner with one Si(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 47-58°. In the second Si site, Si(2) is bonded to one O(1), one O(13), one O(25), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Fe(5)O6 octahedra,  a cornercorner with one Fe(7)O6 octahedra,  a cornercorner with one Fe(8)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, and  a cornercorner with one Si(6)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 47-58°. In the third Si site, Si(3) is bonded to one O(28), one O(29), one O(31), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Fe(4)O6 octahedra,  a cornercorner with one Fe(5)O6 octahedra,  a cornercorner with one Fe(8)O6 octahedra,  a cornercorner with one Si(4)O4 tetrahedra, and  a cornercorner with one Si(6)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 47-58°. In the fourth Si site, Si(4) is bonded to one O(27), one O(30), one O(31), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(3)O6 octahedra,  a cornercorner with one Fe(6)O6 octahedra,  a cornercorner with one Fe(9)O6 octahedra,  a cornercorner with one Si(3)O4 tetrahedra, and  a cornercorner with one Si(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-58°. In the fifth Si site, Si(5) is bonded to one O(16), one O(27), one O(3), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Fe(3)O6 octahedra,  a cornercorner with one Fe(5)O6 octahedra,  a cornercorner with one Fe(8)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, and  a cornercorner with one Si(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-58°. In the sixth Si site, Si(6) is bonded to one O(15), one O(2), one O(28), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(4)O6 octahedra,  a cornercorner with one Fe(6)O6 octahedra,  a cornercorner with one Fe(9)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 47-57°. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(11) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(26) atom. There are thirty-one inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Na(1), one Si(1), and one Si(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(9), and one Si(6) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(8), and one Si(5) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(8), and one B(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(9), and one B(1) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Na(1), one Si(1), and one Si(5) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Na(1), one Si(2), and one Si(6) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(4), and one Si(3) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(3), and one Si(4) atom. In the tenth O site, O(10) is bonded in a distorted T-shaped geometry to one Fe(1), one Fe(4), and one Fe(6) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one Fe(2), one Fe(3), one Fe(5), and one H(1) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Na(1), one Fe(3), one Fe(4), and one B(1) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(5), and one Si(2) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(6), and one Si(1) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Fe(4), one Fe(6), and one Si(6) atom. In the sixteenth O site, O(16) is bonded in a distorted trigonal planar geometry to one Fe(3), one Fe(5), and one Si(5) atom. In the seventeenth O site, O(17) is bonded in a distorted trigonal non-coplanar geometry to one Fe(3), one Fe(4), and one Fe(7) atom. In the eighteenth O site, O(18) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(6), and one B(3) atom. In the nineteenth O site, O(19) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(5), and one B(2) atom. In the twentieth O site, O(20) is bonded in a 4-coordinate geometry to one Na(1), one Fe(4), one Fe(7), and one B(3) atom. In the twenty-first O site, O(21) is bonded in a 4-coordinate geometry to one Na(1), one Fe(3), one Fe(7), and one B(2) atom. In the twenty-second O site, O(22) is bonded in a distorted trigonal planar geometry to one Fe(6), one Fe(9), and one B(2) atom. In the twenty-third O site, O(23) is bonded in a distorted trigonal planar geometry to one Fe(5), one Fe(8), and one B(3) atom. In the twenty-fourth O site, O(24) is bonded in a distorted trigonal planar geometry to one Fe(7), one Fe(9), and one Si(1) atom. In the twenty-fifth O site, O(25) is bonded in a distorted trigonal planar geometry to one Fe(7), one Fe(8), and one Si(2) atom. In the twenty-sixth O site, O(26) is bonded in a distorted single-bond geometry to one Fe(7), one Fe(8), one Fe(9), and one H(2) atom. In the twenty-seventh O site, O(27) is bonded in a 2-coordinate geometry to one Na(1), one Si(4), and one Si(5) atom. In the twenty-eighth O site, O(28) is bonded in a 2-coordinate geometry to one Na(1), one Si(3), and one Si(6) atom. In the twenty-ninth O site, O(29) is bonded in a distorted trigonal planar geometry to one Fe(5), one Fe(8), and one Si(3) atom. In the thirtieth O site, O(30) is bonded in a distorted trigonal planar geometry to one Fe(6), one Fe(9), and one Si(4) atom. In the thirty-first O site, O(31) is bonded in a distorted bent 150 degrees geometry to one Na(1), one Si(3), and one Si(4) atom.
NaFe9B3Si6H2O31 crystallizes in the triclinic P1 space group. Na(1) is bonded in a 9-coordinate geometry to one O(1), one O(12), one O(20), one O(21), one O(27), one O(28), one O(31), one O(6), and one O(7) atom. The Na(1)-O(1) bond length is 2.89 Å. The Na(1)-O(12) bond length is 2.55 Å. The Na(1)-O(20) bond length is 2.53 Å. The Na(1)-O(21) bond length is 2.59 Å. The Na(1)-O(27) bond length is 2.94 Å. The Na(1)-O(28) bond length is 2.74 Å. The Na(1)-O(31) bond length is 2.93 Å. The Na(1)-O(6) bond length is 2.99 Å. The Na(1)-O(7) bond length is 2.87 Å. There are nine inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(10), one O(13), one O(19), one O(3), one O(4), and one O(8) atom to form FeO6 octahedra that share  a cornercorner with one Fe(6)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra,  an edgeedge with one Fe(4)O6 octahedra,  an edgeedge with one Fe(5)O6 octahedra, and  an edgeedge with one Fe(8)O6 octahedra. The corner-sharing octahedral tilt angles are 51°. The Fe(1)-O(10) bond length is 1.94 Å. The Fe(1)-O(13) bond length is 2.16 Å. The Fe(1)-O(19) bond length is 2.01 Å. The Fe(1)-O(3) bond length is 2.05 Å. The Fe(1)-O(4) bond length is 2.05 Å. The Fe(1)-O(8) bond length is 2.05 Å. In the second Fe site, Fe(2) is bonded to one O(11), one O(14), one O(18), one O(2), one O(5), and one O(9) atom to form FeO6 octahedra that share  a cornercorner with one Fe(5)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra,  an edgeedge with one Fe(3)O6 octahedra,  an edgeedge with one Fe(6)O6 octahedra, and  an edgeedge with one Fe(9)O6 octahedra. The corner-sharing octahedral tilt angles are 54°. The Fe(2)-O(11) bond length is 2.10 Å. The Fe(2)-O(14) bond length is 2.04 Å. The Fe(2)-O(18) bond length is 1.98 Å. The Fe(2)-O(2) bond length is 2.04 Å. The Fe(2)-O(5) bond length is 2.03 Å. The Fe(2)-O(9) bond length is 2.04 Å. In the third Fe site, Fe(3) is bonded to one O(11), one O(12), one O(16), one O(17), one O(21), and one O(9) atom to form FeO6 octahedra that share  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra,  an edgeedge with one Fe(2)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra,  an edgeedge with one Fe(5)O6 octahedra, and  an edgeedge with one Fe(7)O6 octahedra. The Fe(3)-O(11) bond length is 2.22 Å. The Fe(3)-O(12) bond length is 2.08 Å. The Fe(3)-O(16) bond length is 2.07 Å. The Fe(3)-O(17) bond length is 1.91 Å. The Fe(3)-O(21) bond length is 2.04 Å. The Fe(3)-O(9) bond length is 2.07 Å. In the fourth Fe site, Fe(4) is bonded to one O(10), one O(12), one O(15), one O(17), one O(20), and one O(8) atom to form FeO6 octahedra that share  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(3)O6 octahedra,  an edgeedge with one Fe(6)O6 octahedra, and  an edgeedge with one Fe(7)O6 octahedra. The Fe(4)-O(10) bond length is 2.03 Å. The Fe(4)-O(12) bond length is 2.12 Å. The Fe(4)-O(15) bond length is 2.07 Å. The Fe(4)-O(17) bond length is 1.97 Å. The Fe(4)-O(20) bond length is 2.08 Å. The Fe(4)-O(8) bond length is 2.07 Å. In the fifth Fe site, Fe(5) is bonded to one O(11), one O(13), one O(16), one O(19), one O(23), and one O(29) atom to form FeO6 octahedra that share  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(3)O6 octahedra, and  an edgeedge with one Fe(8)O6 octahedra. The corner-sharing octahedral tilt angles are 54°. The Fe(5)-O(11) bond length is 2.11 Å. The Fe(5)-O(13) bond length is 2.00 Å. The Fe(5)-O(16) bond length is 2.05 Å. The Fe(5)-O(19) bond length is 2.01 Å. The Fe(5)-O(23) bond length is 2.01 Å. The Fe(5)-O(29) bond length is 2.05 Å. In the sixth Fe site, Fe(6) is bonded to one O(10), one O(14), one O(15), one O(18), one O(22), and one O(30) atom to form FeO6 octahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra,  an edgeedge with one Fe(2)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra, and  an edgeedge with one Fe(9)O6 octahedra. The corner-sharing octahedral tilt angles are 51°. The Fe(6)-O(10) bond length is 1.94 Å. The Fe(6)-O(14) bond length is 2.05 Å. The Fe(6)-O(15) bond length is 2.06 Å. The Fe(6)-O(18) bond length is 2.05 Å. The Fe(6)-O(22) bond length is 2.03 Å. The Fe(6)-O(30) bond length is 2.14 Å. In the seventh Fe site, Fe(7) is bonded to one O(17), one O(20), one O(21), one O(24), one O(25), and one O(26) atom to form FeO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  an edgeedge with one Fe(3)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra,  an edgeedge with one Fe(8)O6 octahedra, and  an edgeedge with one Fe(9)O6 octahedra. The Fe(7)-O(17) bond length is 2.12 Å. The Fe(7)-O(20) bond length is 2.13 Å. The Fe(7)-O(21) bond length is 2.18 Å. The Fe(7)-O(24) bond length is 2.11 Å. The Fe(7)-O(25) bond length is 2.13 Å. The Fe(7)-O(26) bond length is 2.24 Å. In the eighth Fe site, Fe(8) is bonded to one O(23), one O(25), one O(26), one O(29), one O(3), and one O(4) atom to form FeO6 octahedra that share  a cornercorner with one Fe(9)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(5)O6 octahedra, and  an edgeedge with one Fe(7)O6 octahedra. The corner-sharing octahedral tilt angles are 52°. The Fe(8)-O(23) bond length is 2.05 Å. The Fe(8)-O(25) bond length is 1.98 Å. The Fe(8)-O(26) bond length is 2.07 Å. The Fe(8)-O(29) bond length is 2.05 Å. The Fe(8)-O(3) bond length is 2.06 Å. The Fe(8)-O(4) bond length is 2.00 Å. In the ninth Fe site, Fe(9) is bonded to one O(2), one O(22), one O(24), one O(26), one O(30), and one O(5) atom to form FeO6 octahedra that share  a cornercorner with one Fe(8)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra,  an edgeedge with one Fe(2)O6 octahedra,  an edgeedge with one Fe(6)O6 octahedra, and  an edgeedge with one Fe(7)O6 octahedra. The corner-sharing octahedral tilt angles are 52°. The Fe(9)-O(2) bond length is 2.07 Å. The Fe(9)-O(22) bond length is 2.03 Å. The Fe(9)-O(24) bond length is 2.01 Å. The Fe(9)-O(26) bond length is 2.07 Å. The Fe(9)-O(30) bond length is 2.02 Å. The Fe(9)-O(5) bond length is 2.02 Å. There are three inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(12), one O(4), and one O(5) atom. The B(1)-O(12) bond length is 1.39 Å. The B(1)-O(4) bond length is 1.38 Å. The B(1)-O(5) bond length is 1.39 Å. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(19), one O(21), and one O(22) atom. The B(2)-O(19) bond length is 1.39 Å. The B(2)-O(21) bond length is 1.38 Å. The B(2)-O(22) bond length is 1.39 Å. In the third B site, B(3) is bonded in a trigonal planar geometry to one O(18), one O(20), and one O(23) atom. The B(3)-O(18) bond length is 1.38 Å. The B(3)-O(20) bond length is 1.38 Å. The B(3)-O(23) bond length is 1.39 Å. There are six inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(14), one O(24), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(6)O6 octahedra,  a cornercorner with one Fe(7)O6 octahedra,  a cornercorner with one Fe(9)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra, and  a cornercorner with one Si(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 47-58°. The Si(1)-O(1) bond length is 1.66 Å. The Si(1)-O(14) bond length is 1.63 Å. The Si(1)-O(24) bond length is 1.63 Å. The Si(1)-O(6) bond length is 1.65 Å. In the second Si site, Si(2) is bonded to one O(1), one O(13), one O(25), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Fe(5)O6 octahedra,  a cornercorner with one Fe(7)O6 octahedra,  a cornercorner with one Fe(8)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, and  a cornercorner with one Si(6)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 47-58°. The Si(2)-O(1) bond length is 1.66 Å. The Si(2)-O(13) bond length is 1.63 Å. The Si(2)-O(25) bond length is 1.62 Å. The Si(2)-O(7) bond length is 1.65 Å. In the third Si site, Si(3) is bonded to one O(28), one O(29), one O(31), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Fe(4)O6 octahedra,  a cornercorner with one Fe(5)O6 octahedra,  a cornercorner with one Fe(8)O6 octahedra,  a cornercorner with one Si(4)O4 tetrahedra, and  a cornercorner with one Si(6)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 47-58°. The Si(3)-O(28) bond length is 1.65 Å. The Si(3)-O(29) bond length is 1.64 Å. The Si(3)-O(31) bond length is 1.65 Å. The Si(3)-O(8) bond length is 1.63 Å. In the fourth Si site, Si(4) is bonded to one O(27), one O(30), one O(31), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(3)O6 octahedra,  a cornercorner with one Fe(6)O6 octahedra,  a cornercorner with one Fe(9)O6 octahedra,  a cornercorner with one Si(3)O4 tetrahedra, and  a cornercorner with one Si(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-58°. The Si(4)-O(27) bond length is 1.66 Å. The Si(4)-O(30) bond length is 1.63 Å. The Si(4)-O(31) bond length is 1.65 Å. The Si(4)-O(9) bond length is 1.64 Å. In the fifth Si site, Si(5) is bonded to one O(16), one O(27), one O(3), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Fe(3)O6 octahedra,  a cornercorner with one Fe(5)O6 octahedra,  a cornercorner with one Fe(8)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, and  a cornercorner with one Si(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-58°. The Si(5)-O(16) bond length is 1.64 Å. The Si(5)-O(27) bond length is 1.66 Å. The Si(5)-O(3) bond length is 1.63 Å. The Si(5)-O(6) bond length is 1.65 Å. In the sixth Si site, Si(6) is bonded to one O(15), one O(2), one O(28), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(4)O6 octahedra,  a cornercorner with one Fe(6)O6 octahedra,  a cornercorner with one Fe(9)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 47-57°. The Si(6)-O(15) bond length is 1.63 Å. The Si(6)-O(2) bond length is 1.64 Å. The Si(6)-O(28) bond length is 1.65 Å. The Si(6)-O(7) bond length is 1.65 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(11) atom. The H(1)-O(11) bond length is 0.98 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(26) atom. The H(2)-O(26) bond length is 0.98 Å. There are thirty-one inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Na(1), one Si(1), and one Si(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(9), and one Si(6) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(8), and one Si(5) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(8), and one B(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(9), and one B(1) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Na(1), one Si(1), and one Si(5) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Na(1), one Si(2), and one Si(6) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(4), and one Si(3) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(3), and one Si(4) atom. In the tenth O site, O(10) is bonded in a distorted T-shaped geometry to one Fe(1), one Fe(4), and one Fe(6) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one Fe(2), one Fe(3), one Fe(5), and one H(1) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Na(1), one Fe(3), one Fe(4), and one B(1) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(5), and one Si(2) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(6), and one Si(1) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Fe(4), one Fe(6), and one Si(6) atom. In the sixteenth O site, O(16) is bonded in a distorted trigonal planar geometry to one Fe(3), one Fe(5), and one Si(5) atom. In the seventeenth O site, O(17) is bonded in a distorted trigonal non-coplanar geometry to one Fe(3), one Fe(4), and one Fe(7) atom. In the eighteenth O site, O(18) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(6), and one B(3) atom. In the nineteenth O site, O(19) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(5), and one B(2) atom. In the twentieth O site, O(20) is bonded in a 4-coordinate geometry to one Na(1), one Fe(4), one Fe(7), and one B(3) atom. In the twenty-first O site, O(21) is bonded in a 4-coordinate geometry to one Na(1), one Fe(3), one Fe(7), and one B(2) atom. In the twenty-second O site, O(22) is bonded in a distorted trigonal planar geometry to one Fe(6), one Fe(9), and one B(2) atom. In the twenty-third O site, O(23) is bonded in a distorted trigonal planar geometry to one Fe(5), one Fe(8), and one B(3) atom. In the twenty-fourth O site, O(24) is bonded in a distorted trigonal planar geometry to one Fe(7), one Fe(9), and one Si(1) atom. In the twenty-fifth O site, O(25) is bonded in a distorted trigonal planar geometry to one Fe(7), one Fe(8), and one Si(2) atom. In the twenty-sixth O site, O(26) is bonded in a distorted single-bond geometry to one Fe(7), one Fe(8), one Fe(9), and one H(2) atom. In the twenty-seventh O site, O(27) is bonded in a 2-coordinate geometry to one Na(1), one Si(4), and one Si(5) atom. In the twenty-eighth O site, O(28) is bonded in a 2-coordinate geometry to one Na(1), one Si(3), and one Si(6) atom. In the twenty-ninth O site, O(29) is bonded in a distorted trigonal planar geometry to one Fe(5), one Fe(8), and one Si(3) atom. In the thirtieth O site, O(30) is bonded in a distorted trigonal planar geometry to one Fe(6), one Fe(9), and one Si(4) atom. In the thirty-first O site, O(31) is bonded in a distorted bent 150 degrees geometry to one Na(1), one Si(3), and one Si(4) atom.