NaMn2BSi3H2O11 crystallizes in the triclinic P-1 space group. Na(1) is bonded in a 7-coordinate geometry to one O(10), one O(11), one O(2), one O(5), one O(7), one O(8), and one O(9) atom. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(10), one O(2), one O(6), and two equivalent O(4) atoms to form MnO6 octahedra that share  a cornercorner with one B(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and  an edgeedge with one Mn(1)O6 octahedra. In the second Mn site, Mn(2) is bonded in a 6-coordinate geometry to one O(11), one O(2), one O(4), one O(6), and two equivalent O(1) atoms. B(1) is bonded to one O(10), one O(11), one O(3), and one O(5) atom to form BO4 tetrahedra that share  a cornercorner with one Mn(1)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 are 63°. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(6), one O(7), and one O(9) atom to form SiO4 tetrahedra that share corners with two equivalent Mn(1)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 53-61°. In the second Si site, Si(2) is bonded to one O(1), one O(3), one O(8), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra,  a cornercorner with one B(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 59°. In the third Si site, Si(3) is bonded to one O(4), one O(5), one O(7), and one O(8) atom to form SiO4 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra,  a cornercorner with one B(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, and  a cornercorner with one Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 60-63°. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(10) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(11) atom. There are eleven inequivalent O sites. In the first O site, O(1) is bonded to one Mn(1), two equivalent Mn(2), and one Si(2) atom to form distorted OMn3Si tetrahedra that share corners with two equivalent O(4)Mn3Si tetrahedra, corners with three equivalent O(2)NaMn2Si trigonal pyramids,  an edgeedge with one O(1)Mn3Si tetrahedra, and  an edgeedge with one O(4)Mn3Si tetrahedra. In the second O site, O(2) is bonded to one Na(1), one Mn(1), one Mn(2), and one Si(1) atom to form a mixture of distorted corner and edge-sharing ONaMn2Si trigonal pyramids. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one B(1) and one Si(2) atom. In the fourth O site, O(4) is bonded to one Mn(2), two equivalent Mn(1), and one Si(3) atom to form distorted OMn3Si tetrahedra that share corners with two equivalent O(1)Mn3Si tetrahedra,  a cornercorner with one O(2)NaMn2Si trigonal pyramid,  an edgeedge with one O(1)Mn3Si tetrahedra,  an edgeedge with one O(4)Mn3Si tetrahedra, and  an edgeedge with one O(2)NaMn2Si trigonal pyramid. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Na(1), one B(1), and one Si(3) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(2), and one Si(1) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Na(1), one Si(1), and one Si(3) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Na(1), one Si(2), and one Si(3) atom. In the ninth O site, O(9) is bonded in a 2-coordinate geometry to one Na(1), one Si(1), and one Si(2) atom. In the tenth O site, O(10) is bonded in a 2-coordinate geometry to one Na(1), one Mn(1), one B(1), and one H(1) atom. In the eleventh O site, O(11) is bonded in a distorted water-like geometry to one Na(1), one Mn(2), one B(1), and one H(2) atom.
NaMn2BSi3H2O11 crystallizes in the triclinic P-1 space group. Na(1) is bonded in a 7-coordinate geometry to one O(10), one O(11), one O(2), one O(5), one O(7), one O(8), and one O(9) atom. The Na(1)-O(10) bond length is 2.55 Å. The Na(1)-O(11) bond length is 2.42 Å. The Na(1)-O(2) bond length is 2.44 Å. The Na(1)-O(5) bond length is 2.39 Å. The Na(1)-O(7) bond length is 2.49 Å. The Na(1)-O(8) bond length is 2.48 Å. The Na(1)-O(9) bond length is 2.81 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(10), one O(2), one O(6), and two equivalent O(4) atoms to form MnO6 octahedra that share  a cornercorner with one B(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and  an edgeedge with one Mn(1)O6 octahedra. The Mn(1)-O(1) bond length is 2.30 Å. The Mn(1)-O(10) bond length is 2.29 Å. The Mn(1)-O(2) bond length is 2.24 Å. The Mn(1)-O(6) bond length is 2.20 Å. There is one shorter (2.20 Å) and one longer (2.38 Å) Mn(1)-O(4) bond length. In the second Mn site, Mn(2) is bonded in a 6-coordinate geometry to one O(11), one O(2), one O(4), one O(6), and two equivalent O(1) atoms. The Mn(2)-O(11) bond length is 2.33 Å. The Mn(2)-O(2) bond length is 2.20 Å. The Mn(2)-O(4) bond length is 2.23 Å. The Mn(2)-O(6) bond length is 2.21 Å. There is one shorter (2.19 Å) and one longer (2.24 Å) Mn(2)-O(1) bond length. B(1) is bonded to one O(10), one O(11), one O(3), and one O(5) atom to form BO4 tetrahedra that share  a cornercorner with one Mn(1)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 are 63°. The B(1)-O(10) bond length is 1.51 Å. The B(1)-O(11) bond length is 1.50 Å. The B(1)-O(3) bond length is 1.48 Å. The B(1)-O(5) bond length is 1.46 Å. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(6), one O(7), and one O(9) atom to form SiO4 tetrahedra that share corners with two equivalent Mn(1)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 53-61°. The Si(1)-O(2) bond length is 1.63 Å. The Si(1)-O(6) bond length is 1.62 Å. The Si(1)-O(7) bond length is 1.67 Å. The Si(1)-O(9) bond length is 1.67 Å. In the second Si site, Si(2) is bonded to one O(1), one O(3), one O(8), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra,  a cornercorner with one B(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 59°. The Si(2)-O(1) bond length is 1.63 Å. The Si(2)-O(3) bond length is 1.62 Å. The Si(2)-O(8) bond length is 1.65 Å. The Si(2)-O(9) bond length is 1.66 Å. In the third Si site, Si(3) is bonded to one O(4), one O(5), one O(7), and one O(8) atom to form SiO4 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra,  a cornercorner with one B(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, and  a cornercorner with one Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 60-63°. The Si(3)-O(4) bond length is 1.63 Å. The Si(3)-O(5) bond length is 1.61 Å. The Si(3)-O(7) bond length is 1.66 Å. The Si(3)-O(8) 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(10) atom. The H(1)-O(10) bond length is 0.99 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(11) atom. The H(2)-O(11) bond length is 0.98 Å. There are eleven inequivalent O sites. In the first O site, O(1) is bonded to one Mn(1), two equivalent Mn(2), and one Si(2) atom to form distorted OMn3Si tetrahedra that share corners with two equivalent O(4)Mn3Si tetrahedra, corners with three equivalent O(2)NaMn2Si trigonal pyramids,  an edgeedge with one O(1)Mn3Si tetrahedra, and  an edgeedge with one O(4)Mn3Si tetrahedra. In the second O site, O(2) is bonded to one Na(1), one Mn(1), one Mn(2), and one Si(1) atom to form a mixture of distorted corner and edge-sharing ONaMn2Si trigonal pyramids. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one B(1) and one Si(2) atom. In the fourth O site, O(4) is bonded to one Mn(2), two equivalent Mn(1), and one Si(3) atom to form distorted OMn3Si tetrahedra that share corners with two equivalent O(1)Mn3Si tetrahedra,  a cornercorner with one O(2)NaMn2Si trigonal pyramid,  an edgeedge with one O(1)Mn3Si tetrahedra,  an edgeedge with one O(4)Mn3Si tetrahedra, and  an edgeedge with one O(2)NaMn2Si trigonal pyramid. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Na(1), one B(1), and one Si(3) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(2), and one Si(1) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Na(1), one Si(1), and one Si(3) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Na(1), one Si(2), and one Si(3) atom. In the ninth O site, O(9) is bonded in a 2-coordinate geometry to one Na(1), one Si(1), and one Si(2) atom. In the tenth O site, O(10) is bonded in a 2-coordinate geometry to one Na(1), one Mn(1), one B(1), and one H(1) atom. In the eleventh O site, O(11) is bonded in a distorted water-like geometry to one Na(1), one Mn(2), one B(1), and one H(2) atom.