Mn9Zn6Si4(SbO14)2 crystallizes in the triclinic P-1 space group. There are five inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(11), one O(4), one O(5), and one O(7) atom to form MnO5 trigonal bipyramids that share  a cornercorner with one Mn(4)O6 octahedra,  a cornercorner with one Mn(5)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Zn(2)O4 tetrahedra, corners with two equivalent Zn(3)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Mn(3)O5 trigonal bipyramid, and  an edgeedge with one Zn(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 55-65°. In the second Mn site, Mn(2) is bonded to two equivalent O(12), two equivalent O(3), and two equivalent O(6) atoms to form MnO6 octahedra that share corners with two equivalent Zn(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Zn(1)O5 trigonal bipyramids, edges with two equivalent Sb(1)O6 octahedra, and edges with four equivalent Mn(5)O6 octahedra. In the third Mn site, Mn(3) is bonded to one O(10), one O(11), one O(13), one O(4), and one O(9) atom to form MnO5 trigonal bipyramids that share  a cornercorner with one Mn(4)O6 octahedra,  a cornercorner with one Mn(5)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Zn(3)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Zn(2)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Zn(1)O5 trigonal bipyramids, and  an edgeedge with one Mn(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 50-65°. In the fourth Mn site, Mn(4) is bonded to one O(1), one O(10), two equivalent O(14), and two equivalent O(2) atoms to form MnO6 octahedra that share corners with two equivalent Zn(2)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  a cornercorner with one Mn(1)O5 trigonal bipyramid,  a cornercorner with one Mn(3)O5 trigonal bipyramid,  an edgeedge with one Mn(5)O6 octahedra, edges with two equivalent Mn(4)O6 octahedra, and edges with three equivalent Sb(1)O6 octahedra. In the fifth Mn site, Mn(5) is bonded to one O(1), one O(10), one O(12), one O(6), and two equivalent O(3) atoms to form MnO6 octahedra that share  a cornercorner with one Zn(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra,  a cornercorner with one Mn(1)O5 trigonal bipyramid,  a cornercorner with one Mn(3)O5 trigonal bipyramid,  a cornercorner with one Zn(1)O5 trigonal bipyramid,  an edgeedge with one Mn(4)O6 octahedra,  an edgeedge with one Mn(5)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. There are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(13), one O(4), one O(6), one O(7), and one O(8) atom to form distorted ZnO5 trigonal bipyramids that share  a cornercorner with one Mn(2)O6 octahedra,  a cornercorner with one Mn(5)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Zn(3)O4 tetrahedra, corners with three equivalent Si(1)O4 tetrahedra, corners with two equivalent Mn(3)O5 trigonal bipyramids, and  an edgeedge with one Mn(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 54-65°. In the second Zn site, Zn(2) is bonded to one O(11), one O(14), one O(5), and one O(9) atom to form ZnO4 tetrahedra that share  a cornercorner with one Sb(1)O6 octahedra, corners with two equivalent Mn(4)O6 octahedra,  a cornercorner with one Zn(3)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Mn(1)O5 trigonal bipyramids, and corners with two equivalent Mn(3)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 57-66°. In the third Zn site, Zn(3) is bonded to one O(11), one O(12), one O(7), and one O(8) atom to form distorted ZnO4 tetrahedra that share  a cornercorner with one Mn(2)O6 octahedra,  a cornercorner with one Mn(5)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Zn(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra,  a cornercorner with one Mn(3)O5 trigonal bipyramid, corners with two equivalent Mn(1)O5 trigonal bipyramids, and corners with two equivalent Zn(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 53-67°. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(13), one O(3), one O(7), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Mn(2)O6 octahedra, corners with two equivalent Mn(5)O6 octahedra, corners with two equivalent Zn(3)O4 tetrahedra,  a cornercorner with one Mn(1)O5 trigonal bipyramid,  a cornercorner with one Mn(3)O5 trigonal bipyramid, and corners with three equivalent Zn(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 55-61°. In the second Si site, Si(2) is bonded to one O(2), one O(4), one O(5), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Sb(1)O6 octahedra, corners with two equivalent Mn(4)O6 octahedra, corners with two equivalent Zn(2)O4 tetrahedra,  a cornercorner with one Zn(1)O5 trigonal bipyramid, corners with two equivalent Mn(1)O5 trigonal bipyramids, and corners with two equivalent Mn(3)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 51-65°. Sb(1) is bonded to one O(1), one O(10), one O(12), one O(14), one O(2), and one O(6) atom to form SbO6 octahedra that share  a cornercorner with one Zn(2)O4 tetrahedra,  a cornercorner with one Zn(3)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Mn(1)O5 trigonal bipyramid,  a cornercorner with one Mn(3)O5 trigonal bipyramid,  a cornercorner with one Zn(1)O5 trigonal bipyramid,  an edgeedge with one Mn(2)O6 octahedra, edges with two equivalent Mn(5)O6 octahedra, and edges with three equivalent Mn(4)O6 octahedra. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded to one Mn(1), one Mn(4), one Mn(5), and one Sb(1) atom to form distorted OMn3Sb trigonal pyramids that share  a cornercorner with one O(11)Mn2Zn2 tetrahedra, corners with two equivalent O(12)Mn2ZnSb tetrahedra, corners with three equivalent O(14)Mn2ZnSb tetrahedra, and  an edgeedge with one O(6)Mn2ZnSb tetrahedra. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Mn(4), one Si(2), and one Sb(1) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Mn(2), two equivalent Mn(5), and one Si(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Mn(1), one Mn(3), one Zn(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Mn(1), one Zn(2), and one Si(2) atom. In the sixth O site, O(6) is bonded to one Mn(2), one Mn(5), one Zn(1), and one Sb(1) atom to form distorted OMn2ZnSb tetrahedra that share  a cornercorner with one O(14)Mn2ZnSb tetrahedra,  a cornercorner with one O(6)Mn2ZnSb tetrahedra, corners with two equivalent O(12)Mn2ZnSb tetrahedra,  an edgeedge with one O(12)Mn2ZnSb tetrahedra, and  an edgeedge with one O(1)Mn3Sb trigonal pyramid. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Mn(1), one Zn(1), one Zn(3), and one Si(1) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Zn(1), one Zn(3), and one Si(1) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Mn(3), one Zn(2), and one Si(2) atom. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to one Mn(3), one Mn(4), one Mn(5), and one Sb(1) atom. In the eleventh O site, O(11) is bonded to one Mn(1), one Mn(3), one Zn(2), and one Zn(3) atom to form OMn2Zn2 tetrahedra that share  a cornercorner with one O(12)Mn2ZnSb tetrahedra,  a cornercorner with one O(14)Mn2ZnSb tetrahedra, and  a cornercorner with one O(1)Mn3Sb trigonal pyramid. In the twelfth O site, O(12) is bonded to one Mn(2), one Mn(5), one Zn(3), and one Sb(1) atom to form distorted OMn2ZnSb tetrahedra that share  a cornercorner with one O(11)Mn2Zn2 tetrahedra,  a cornercorner with one O(12)Mn2ZnSb tetrahedra,  a cornercorner with one O(14)Mn2ZnSb tetrahedra, corners with two equivalent O(6)Mn2ZnSb tetrahedra, corners with two equivalent O(1)Mn3Sb trigonal pyramids, and  an edgeedge with one O(6)Mn2ZnSb tetrahedra. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one Mn(3), one Zn(1), and one Si(1) atom. In the fourteenth O site, O(14) is bonded to two equivalent Mn(4), one Zn(2), and one Sb(1) atom to form OMn2ZnSb tetrahedra that share  a cornercorner with one O(11)Mn2Zn2 tetrahedra,  a cornercorner with one O(12)Mn2ZnSb tetrahedra,  a cornercorner with one O(6)Mn2ZnSb tetrahedra, corners with three equivalent O(1)Mn3Sb trigonal pyramids, and  an edgeedge with one O(14)Mn2ZnSb tetrahedra.
Mn9Zn6Si4(SbO14)2 crystallizes in the triclinic P-1 space group. There are five inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(11), one O(4), one O(5), and one O(7) atom to form MnO5 trigonal bipyramids that share  a cornercorner with one Mn(4)O6 octahedra,  a cornercorner with one Mn(5)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Zn(2)O4 tetrahedra, corners with two equivalent Zn(3)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Mn(3)O5 trigonal bipyramid, and  an edgeedge with one Zn(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 55-65°. The Mn(1)-O(1) bond length is 2.12 Å. The Mn(1)-O(11) bond length is 2.05 Å. The Mn(1)-O(4) bond length is 2.34 Å. The Mn(1)-O(5) bond length is 2.10 Å. The Mn(1)-O(7) bond length is 2.11 Å. In the second Mn site, Mn(2) is bonded to two equivalent O(12), two equivalent O(3), and two equivalent O(6) atoms to form MnO6 octahedra that share corners with two equivalent Zn(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Zn(1)O5 trigonal bipyramids, edges with two equivalent Sb(1)O6 octahedra, and edges with four equivalent Mn(5)O6 octahedra. Both Mn(2)-O(12) bond lengths are 2.21 Å. Both Mn(2)-O(3) bond lengths are 2.23 Å. Both Mn(2)-O(6) bond lengths are 2.22 Å. In the third Mn site, Mn(3) is bonded to one O(10), one O(11), one O(13), one O(4), and one O(9) atom to form MnO5 trigonal bipyramids that share  a cornercorner with one Mn(4)O6 octahedra,  a cornercorner with one Mn(5)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Zn(3)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Zn(2)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Zn(1)O5 trigonal bipyramids, and  an edgeedge with one Mn(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 50-65°. The Mn(3)-O(10) bond length is 2.09 Å. The Mn(3)-O(11) bond length is 2.09 Å. The Mn(3)-O(13) bond length is 2.11 Å. The Mn(3)-O(4) bond length is 2.18 Å. The Mn(3)-O(9) bond length is 2.11 Å. In the fourth Mn site, Mn(4) is bonded to one O(1), one O(10), two equivalent O(14), and two equivalent O(2) atoms to form MnO6 octahedra that share corners with two equivalent Zn(2)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  a cornercorner with one Mn(1)O5 trigonal bipyramid,  a cornercorner with one Mn(3)O5 trigonal bipyramid,  an edgeedge with one Mn(5)O6 octahedra, edges with two equivalent Mn(4)O6 octahedra, and edges with three equivalent Sb(1)O6 octahedra. The Mn(4)-O(1) bond length is 2.16 Å. The Mn(4)-O(10) bond length is 2.19 Å. There is one shorter (2.15 Å) and one longer (2.16 Å) Mn(4)-O(14) bond length. There is one shorter (2.24 Å) and one longer (2.39 Å) Mn(4)-O(2) bond length. In the fifth Mn site, Mn(5) is bonded to one O(1), one O(10), one O(12), one O(6), and two equivalent O(3) atoms to form MnO6 octahedra that share  a cornercorner with one Zn(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra,  a cornercorner with one Mn(1)O5 trigonal bipyramid,  a cornercorner with one Mn(3)O5 trigonal bipyramid,  a cornercorner with one Zn(1)O5 trigonal bipyramid,  an edgeedge with one Mn(4)O6 octahedra,  an edgeedge with one Mn(5)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. The Mn(5)-O(1) bond length is 2.25 Å. The Mn(5)-O(10) bond length is 2.25 Å. The Mn(5)-O(12) bond length is 2.17 Å. The Mn(5)-O(6) bond length is 2.16 Å. There is one shorter (2.16 Å) and one longer (2.17 Å) Mn(5)-O(3) bond length. There are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(13), one O(4), one O(6), one O(7), and one O(8) atom to form distorted ZnO5 trigonal bipyramids that share  a cornercorner with one Mn(2)O6 octahedra,  a cornercorner with one Mn(5)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Zn(3)O4 tetrahedra, corners with three equivalent Si(1)O4 tetrahedra, corners with two equivalent Mn(3)O5 trigonal bipyramids, and  an edgeedge with one Mn(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 54-65°. The Zn(1)-O(13) bond length is 1.98 Å. The Zn(1)-O(4) bond length is 2.02 Å. The Zn(1)-O(6) bond length is 2.02 Å. The Zn(1)-O(7) bond length is 2.50 Å. The Zn(1)-O(8) bond length is 1.97 Å. In the second Zn site, Zn(2) is bonded to one O(11), one O(14), one O(5), and one O(9) atom to form ZnO4 tetrahedra that share  a cornercorner with one Sb(1)O6 octahedra, corners with two equivalent Mn(4)O6 octahedra,  a cornercorner with one Zn(3)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Mn(1)O5 trigonal bipyramids, and corners with two equivalent Mn(3)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 57-66°. The Zn(2)-O(11) bond length is 1.92 Å. The Zn(2)-O(14) bond length is 2.00 Å. The Zn(2)-O(5) bond length is 1.96 Å. The Zn(2)-O(9) bond length is 1.97 Å. In the third Zn site, Zn(3) is bonded to one O(11), one O(12), one O(7), and one O(8) atom to form distorted ZnO4 tetrahedra that share  a cornercorner with one Mn(2)O6 octahedra,  a cornercorner with one Mn(5)O6 octahedra,  a cornercorner with one Sb(1)O6 octahedra,  a cornercorner with one Zn(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra,  a cornercorner with one Mn(3)O5 trigonal bipyramid, corners with two equivalent Mn(1)O5 trigonal bipyramids, and corners with two equivalent Zn(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 53-67°. The Zn(3)-O(11) bond length is 1.93 Å. The Zn(3)-O(12) bond length is 2.02 Å. The Zn(3)-O(7) bond length is 2.02 Å. The Zn(3)-O(8) bond length is 1.99 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(13), one O(3), one O(7), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Mn(2)O6 octahedra, corners with two equivalent Mn(5)O6 octahedra, corners with two equivalent Zn(3)O4 tetrahedra,  a cornercorner with one Mn(1)O5 trigonal bipyramid,  a cornercorner with one Mn(3)O5 trigonal bipyramid, and corners with three equivalent Zn(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 55-61°. The Si(1)-O(13) bond length is 1.64 Å. The Si(1)-O(3) bond length is 1.64 Å. The Si(1)-O(7) bond length is 1.65 Å. The Si(1)-O(8) bond length is 1.64 Å. In the second Si site, Si(2) is bonded to one O(2), one O(4), one O(5), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Sb(1)O6 octahedra, corners with two equivalent Mn(4)O6 octahedra, corners with two equivalent Zn(2)O4 tetrahedra,  a cornercorner with one Zn(1)O5 trigonal bipyramid, corners with two equivalent Mn(1)O5 trigonal bipyramids, and corners with two equivalent Mn(3)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 51-65°. The Si(2)-O(2) bond length is 1.67 Å. The Si(2)-O(4) bond length is 1.64 Å. The Si(2)-O(5) bond length is 1.62 Å. The Si(2)-O(9) bond length is 1.62 Å. Sb(1) is bonded to one O(1), one O(10), one O(12), one O(14), one O(2), and one O(6) atom to form SbO6 octahedra that share  a cornercorner with one Zn(2)O4 tetrahedra,  a cornercorner with one Zn(3)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Mn(1)O5 trigonal bipyramid,  a cornercorner with one Mn(3)O5 trigonal bipyramid,  a cornercorner with one Zn(1)O5 trigonal bipyramid,  an edgeedge with one Mn(2)O6 octahedra, edges with two equivalent Mn(5)O6 octahedra, and edges with three equivalent Mn(4)O6 octahedra. The Sb(1)-O(1) bond length is 1.98 Å. The Sb(1)-O(10) bond length is 1.99 Å. The Sb(1)-O(12) bond length is 1.98 Å. The Sb(1)-O(14) bond length is 1.99 Å. The Sb(1)-O(2) bond length is 2.08 Å. The Sb(1)-O(6) bond length is 1.98 Å. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded to one Mn(1), one Mn(4), one Mn(5), and one Sb(1) atom to form distorted OMn3Sb trigonal pyramids that share  a cornercorner with one O(11)Mn2Zn2 tetrahedra, corners with two equivalent O(12)Mn2ZnSb tetrahedra, corners with three equivalent O(14)Mn2ZnSb tetrahedra, and  an edgeedge with one O(6)Mn2ZnSb tetrahedra. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Mn(4), one Si(2), and one Sb(1) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Mn(2), two equivalent Mn(5), and one Si(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Mn(1), one Mn(3), one Zn(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Mn(1), one Zn(2), and one Si(2) atom. In the sixth O site, O(6) is bonded to one Mn(2), one Mn(5), one Zn(1), and one Sb(1) atom to form distorted OMn2ZnSb tetrahedra that share  a cornercorner with one O(14)Mn2ZnSb tetrahedra,  a cornercorner with one O(6)Mn2ZnSb tetrahedra, corners with two equivalent O(12)Mn2ZnSb tetrahedra,  an edgeedge with one O(12)Mn2ZnSb tetrahedra, and  an edgeedge with one O(1)Mn3Sb trigonal pyramid. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Mn(1), one Zn(1), one Zn(3), and one Si(1) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Zn(1), one Zn(3), and one Si(1) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Mn(3), one Zn(2), and one Si(2) atom. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to one Mn(3), one Mn(4), one Mn(5), and one Sb(1) atom. In the eleventh O site, O(11) is bonded to one Mn(1), one Mn(3), one Zn(2), and one Zn(3) atom to form OMn2Zn2 tetrahedra that share  a cornercorner with one O(12)Mn2ZnSb tetrahedra,  a cornercorner with one O(14)Mn2ZnSb tetrahedra, and  a cornercorner with one O(1)Mn3Sb trigonal pyramid. In the twelfth O site, O(12) is bonded to one Mn(2), one Mn(5), one Zn(3), and one Sb(1) atom to form distorted OMn2ZnSb tetrahedra that share  a cornercorner with one O(11)Mn2Zn2 tetrahedra,  a cornercorner with one O(12)Mn2ZnSb tetrahedra,  a cornercorner with one O(14)Mn2ZnSb tetrahedra, corners with two equivalent O(6)Mn2ZnSb tetrahedra, corners with two equivalent O(1)Mn3Sb trigonal pyramids, and  an edgeedge with one O(6)Mn2ZnSb tetrahedra. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one Mn(3), one Zn(1), and one Si(1) atom. In the fourteenth O site, O(14) is bonded to two equivalent Mn(4), one Zn(2), and one Sb(1) atom to form OMn2ZnSb tetrahedra that share  a cornercorner with one O(11)Mn2Zn2 tetrahedra,  a cornercorner with one O(12)Mn2ZnSb tetrahedra,  a cornercorner with one O(6)Mn2ZnSb tetrahedra, corners with three equivalent O(1)Mn3Sb trigonal pyramids, and  an edgeedge with one O(14)Mn2ZnSb tetrahedra.