The material described by Na5Mn11O24 is beta indium sulfide-derived structured and crystallizes in the monoclinic Cm space group. There are five inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(5), one O(7), and two equivalent O(8) atoms to form NaO4 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(6)O6 octahedra, corners with three equivalent Mn(4)O6 octahedra, and corners with four equivalent Mn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-69°. In the second Na site, Na(2) is bonded to one O(3), one O(4), and two equivalent O(11) atoms to form distorted NaO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra, corners with three equivalent Mn(4)O6 octahedra, and corners with four equivalent Mn(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-66°. In the third Na site, Na(3) is bonded to one O(15), one O(16), and two equivalent O(9) atoms to form distorted NaO4 tetrahedra that share  a cornercorner with one Mn(8)O6 octahedra, corners with two equivalent Mn(7)O6 octahedra, corners with three equivalent Mn(5)O6 octahedra, and corners with four equivalent Mn(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-66°. In the fourth Na site, Na(4) is bonded to one O(12), one O(14), and two equivalent O(10) atoms to form NaO4 tetrahedra that share corners with two equivalent Mn(6)O6 octahedra, corners with two equivalent Mn(8)O6 octahedra, corners with three equivalent Mn(5)O6 octahedra, and corners with four equivalent Mn(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-71°. In the fifth Na site, Na(5) is bonded to one O(17), one O(6), and two equivalent O(18) atoms to form NaO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra, corners with two equivalent Mn(8)O6 octahedra, corners with three equivalent Mn(2)O6 octahedra, and corners with four equivalent Mn(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-69°. There are eight inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(3), one O(6), two equivalent O(1), and two equivalent O(8) atoms to form MnO6 octahedra that share  a cornercorner with one Na(2)O4 tetrahedra,  a cornercorner with one Na(5)O4 tetrahedra, corners with two equivalent Na(1)O4 tetrahedra,  an edgeedge with one Mn(2)O6 octahedra,  an edgeedge with one Mn(4)O6 octahedra, and edges with four equivalent Mn(3)O6 octahedra. In the second Mn site, Mn(2) is bonded to one O(17), one O(2), two equivalent O(1), and two equivalent O(18) atoms to form MnO6 octahedra that share corners with three equivalent Na(5)O4 tetrahedra,  an edgeedge with one Mn(1)O6 octahedra,  an edgeedge with one Mn(8)O6 octahedra, edges with two equivalent Mn(3)O6 octahedra, and edges with two equivalent Mn(7)O6 octahedra. In the third Mn site, Mn(3) is bonded to one O(1), one O(2), one O(3), one O(6), one O(7), and one O(8) atom to form MnO6 octahedra that share  a cornercorner with one Na(2)O4 tetrahedra,  a cornercorner with one Na(5)O4 tetrahedra, corners with two equivalent Na(1)O4 tetrahedra,  an edgeedge with one Mn(2)O6 octahedra,  an edgeedge with one Mn(4)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with two equivalent Mn(3)O6 octahedra. In the fourth Mn site, Mn(4) is bonded to one O(4), one O(7), two equivalent O(11), and two equivalent O(8) atoms to form MnO6 octahedra that share corners with three equivalent Na(1)O4 tetrahedra, corners with three equivalent Na(2)O4 tetrahedra,  an edgeedge with one Mn(1)O6 octahedra, edges with two equivalent Mn(3)O6 octahedra, and edges with two equivalent Mn(6)O6 octahedra. In the fifth Mn site, Mn(5) is bonded to one O(12), one O(16), two equivalent O(10), and two equivalent O(9) atoms to form distorted MnO6 octahedra that share corners with three equivalent Na(3)O4 tetrahedra, corners with three equivalent Na(4)O4 tetrahedra,  an edgeedge with one Mn(8)O6 octahedra, edges with two equivalent Mn(6)O6 octahedra, and edges with two equivalent Mn(7)O6 octahedra. In the sixth Mn site, Mn(6) is bonded to one O(11), one O(14), one O(16), one O(4), one O(5), and one O(9) atom to form MnO6 octahedra that share  a cornercorner with one Na(1)O4 tetrahedra,  a cornercorner with one Na(4)O4 tetrahedra, corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(3)O4 tetrahedra,  an edgeedge with one Mn(4)O6 octahedra,  an edgeedge with one Mn(5)O6 octahedra, and edges with two equivalent Mn(6)O6 octahedra. In the seventh Mn site, Mn(7) is bonded to one O(10), one O(12), one O(13), one O(15), one O(17), and one O(18) atom to form MnO6 octahedra that share  a cornercorner with one Na(3)O4 tetrahedra, corners with two equivalent Na(4)O4 tetrahedra, corners with two equivalent Na(5)O4 tetrahedra,  an edgeedge with one Mn(2)O6 octahedra,  an edgeedge with one Mn(5)O6 octahedra, edges with two equivalent Mn(7)O6 octahedra, and edges with two equivalent Mn(8)O6 octahedra. In the eighth Mn site, Mn(8) is bonded to one O(13), one O(15), two equivalent O(10), and two equivalent O(18) atoms to form MnO6 octahedra that share  a cornercorner with one Na(3)O4 tetrahedra, corners with two equivalent Na(4)O4 tetrahedra, corners with two equivalent Na(5)O4 tetrahedra,  an edgeedge with one Mn(2)O6 octahedra,  an edgeedge with one Mn(5)O6 octahedra, and edges with four equivalent Mn(7)O6 octahedra. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Mn(1), one Mn(2), and one Mn(3) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Mn(2) and two equivalent Mn(3) atoms. In the third O site, O(3) is bonded to one Na(2), one Mn(1), and two equivalent Mn(3) atoms to form corner-sharing ONaMn3 tetrahedra. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Na(2), one Mn(4), and two equivalent Mn(6) atoms. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Na(1) and two equivalent Mn(6) atoms. In the sixth O site, O(6) is bonded to one Na(5), one Mn(1), and two equivalent Mn(3) atoms to form a mixture of corner and edge-sharing ONaMn3 tetrahedra. In the seventh O site, O(7) is bonded to one Na(1), one Mn(4), and two equivalent Mn(3) atoms to form a mixture of corner and edge-sharing ONaMn3 tetrahedra. In the eighth O site, O(8) is bonded to one Na(1), one Mn(1), one Mn(3), and one Mn(4) atom to form a mixture of corner and edge-sharing ONaMn3 tetrahedra. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Na(3), one Mn(5), and one Mn(6) atom. In the tenth O site, O(10) is bonded to one Na(4), one Mn(5), one Mn(7), and one Mn(8) atom to form a mixture of corner and edge-sharing ONaMn3 tetrahedra. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Na(2), one Mn(4), and one Mn(6) atom. In the twelfth O site, O(12) is bonded to one Na(4), one Mn(5), and two equivalent Mn(7) atoms to form a mixture of corner and edge-sharing ONaMn3 tetrahedra. In the thirteenth O site, O(13) is bonded in a distorted T-shaped geometry to one Mn(8) and two equivalent Mn(7) atoms. In the fourteenth O site, O(14) is bonded in a trigonal planar geometry to one Na(4) and two equivalent Mn(6) atoms. In the fifteenth O site, O(15) is bonded to one Na(3), one Mn(8), and two equivalent Mn(7) atoms to form a mixture of corner and edge-sharing ONaMn3 tetrahedra. In the sixteenth O site, O(16) is bonded in a rectangular see-saw-like geometry to one Na(3), one Mn(5), and two equivalent Mn(6) atoms. In the seventeenth O site, O(17) is bonded to one Na(5), one Mn(2), and two equivalent Mn(7) atoms to form a mixture of corner and edge-sharing ONaMn3 tetrahedra. In the eighteenth O site, O(18) is bonded to one Na(5), one Mn(2), one Mn(7), and one Mn(8) atom to form a mixture of corner and edge-sharing ONaMn3 tetrahedra. is represented by the CIF card [CIF]
data_Na5Mn11O24
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.136
_cell_length_b   6.136
_cell_length_c   14.844
_cell_angle_alpha   87.191
_cell_angle_beta   87.191
_cell_angle_gamma   58.567
_symmetry_Int_Tables_number   1
_cell_volume   476.140
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Na  Na0  1  0.350  0.350  0.698  1.0
  Na  Na1  1  0.004  0.004  0.624  1.0
  Na  Na2  1  0.997  0.997  0.377  1.0
  Na  Na3  1  0.649  0.649  0.304  1.0
  Na  Na4  1  0.674  0.674  0.043  1.0
  Mn  Mn5  1  0.837  0.837  0.839  1.0
  Mn  Mn6  1  1.000  1.000  0.998  1.0
  Mn  Mn7  1  0.838  0.339  0.836  1.0
  Mn  Mn8  1  0.339  0.838  0.836  1.0
  Mn  Mn9  1  0.682  0.682  0.668  1.0
  Mn  Mn10  1  0.318  0.318  0.333  1.0
  Mn  Mn11  1  0.500  0.000  0.501  1.0
  Mn  Mn12  1  0.000  0.500  0.501  1.0
  Mn  Mn13  1  0.163  0.658  0.164  1.0
  Mn  Mn14  1  0.658  0.163  0.164  1.0
  Mn  Mn15  1  0.164  0.164  0.161  1.0
  O  O16  1  0.145  0.719  0.915  1.0
  O  O17  1  0.719  0.145  0.915  1.0
  O  O18  1  0.142  0.142  0.912  1.0
  O  O19  1  0.007  0.007  0.773  1.0
  O  O20  1  0.819  0.819  0.572  1.0
  O  O21  1  0.323  0.323  0.555  1.0
  O  O22  1  0.664  0.664  0.901  1.0
  O  O23  1  0.537  0.537  0.760  1.0
  O  O24  1  0.535  0.962  0.764  1.0
  O  O25  1  0.146  0.599  0.401  1.0
  O  O26  1  0.599  0.146  0.401  1.0
  O  O27  1  0.962  0.535  0.764  1.0
  O  O28  1  0.035  0.465  0.234  1.0
  O  O29  1  0.465  0.035  0.234  1.0
  O  O30  1  0.401  0.855  0.599  1.0
  O  O31  1  0.855  0.401  0.599  1.0
  O  O32  1  0.462  0.462  0.239  1.0
  O  O33  1  0.335  0.335  0.096  1.0
  O  O34  1  0.678  0.678  0.446  1.0
  O  O35  1  0.992  0.992  0.228  1.0
  O  O36  1  0.181  0.181  0.428  1.0
  O  O37  1  0.860  0.860  0.089  1.0
  O  O38  1  0.856  0.279  0.086  1.0
  O  O39  1  0.279  0.856  0.086  1.0
[/CIF]
.
The material described by Na5Mn11O24 is beta indium sulfide-derived structured and crystallizes in the monoclinic Cm space group. There are five inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(5), one O(7), and two equivalent O(8) atoms to form NaO4 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(6)O6 octahedra, corners with three equivalent Mn(4)O6 octahedra, and corners with four equivalent Mn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-69°. In the second Na site, Na(2) is bonded to one O(3), one O(4), and two equivalent O(11) atoms to form distorted NaO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra, corners with three equivalent Mn(4)O6 octahedra, and corners with four equivalent Mn(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-66°. In the third Na site, Na(3) is bonded to one O(15), one O(16), and two equivalent O(9) atoms to form distorted NaO4 tetrahedra that share  a cornercorner with one Mn(8)O6 octahedra, corners with two equivalent Mn(7)O6 octahedra, corners with three equivalent Mn(5)O6 octahedra, and corners with four equivalent Mn(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-66°. In the fourth Na site, Na(4) is bonded to one O(12), one O(14), and two equivalent O(10) atoms to form NaO4 tetrahedra that share corners with two equivalent Mn(6)O6 octahedra, corners with two equivalent Mn(8)O6 octahedra, corners with three equivalent Mn(5)O6 octahedra, and corners with four equivalent Mn(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-71°. In the fifth Na site, Na(5) is bonded to one O(17), one O(6), and two equivalent O(18) atoms to form NaO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra, corners with two equivalent Mn(8)O6 octahedra, corners with three equivalent Mn(2)O6 octahedra, and corners with four equivalent Mn(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-69°. There are eight inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(3), one O(6), two equivalent O(1), and two equivalent O(8) atoms to form MnO6 octahedra that share  a cornercorner with one Na(2)O4 tetrahedra,  a cornercorner with one Na(5)O4 tetrahedra, corners with two equivalent Na(1)O4 tetrahedra,  an edgeedge with one Mn(2)O6 octahedra,  an edgeedge with one Mn(4)O6 octahedra, and edges with four equivalent Mn(3)O6 octahedra. In the second Mn site, Mn(2) is bonded to one O(17), one O(2), two equivalent O(1), and two equivalent O(18) atoms to form MnO6 octahedra that share corners with three equivalent Na(5)O4 tetrahedra,  an edgeedge with one Mn(1)O6 octahedra,  an edgeedge with one Mn(8)O6 octahedra, edges with two equivalent Mn(3)O6 octahedra, and edges with two equivalent Mn(7)O6 octahedra. In the third Mn site, Mn(3) is bonded to one O(1), one O(2), one O(3), one O(6), one O(7), and one O(8) atom to form MnO6 octahedra that share  a cornercorner with one Na(2)O4 tetrahedra,  a cornercorner with one Na(5)O4 tetrahedra, corners with two equivalent Na(1)O4 tetrahedra,  an edgeedge with one Mn(2)O6 octahedra,  an edgeedge with one Mn(4)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with two equivalent Mn(3)O6 octahedra. In the fourth Mn site, Mn(4) is bonded to one O(4), one O(7), two equivalent O(11), and two equivalent O(8) atoms to form MnO6 octahedra that share corners with three equivalent Na(1)O4 tetrahedra, corners with three equivalent Na(2)O4 tetrahedra,  an edgeedge with one Mn(1)O6 octahedra, edges with two equivalent Mn(3)O6 octahedra, and edges with two equivalent Mn(6)O6 octahedra. In the fifth Mn site, Mn(5) is bonded to one O(12), one O(16), two equivalent O(10), and two equivalent O(9) atoms to form distorted MnO6 octahedra that share corners with three equivalent Na(3)O4 tetrahedra, corners with three equivalent Na(4)O4 tetrahedra,  an edgeedge with one Mn(8)O6 octahedra, edges with two equivalent Mn(6)O6 octahedra, and edges with two equivalent Mn(7)O6 octahedra. In the sixth Mn site, Mn(6) is bonded to one O(11), one O(14), one O(16), one O(4), one O(5), and one O(9) atom to form MnO6 octahedra that share  a cornercorner with one Na(1)O4 tetrahedra,  a cornercorner with one Na(4)O4 tetrahedra, corners with two equivalent Na(2)O4 tetrahedra, corners with two equivalent Na(3)O4 tetrahedra,  an edgeedge with one Mn(4)O6 octahedra,  an edgeedge with one Mn(5)O6 octahedra, and edges with two equivalent Mn(6)O6 octahedra. In the seventh Mn site, Mn(7) is bonded to one O(10), one O(12), one O(13), one O(15), one O(17), and one O(18) atom to form MnO6 octahedra that share  a cornercorner with one Na(3)O4 tetrahedra, corners with two equivalent Na(4)O4 tetrahedra, corners with two equivalent Na(5)O4 tetrahedra,  an edgeedge with one Mn(2)O6 octahedra,  an edgeedge with one Mn(5)O6 octahedra, edges with two equivalent Mn(7)O6 octahedra, and edges with two equivalent Mn(8)O6 octahedra. In the eighth Mn site, Mn(8) is bonded to one O(13), one O(15), two equivalent O(10), and two equivalent O(18) atoms to form MnO6 octahedra that share  a cornercorner with one Na(3)O4 tetrahedra, corners with two equivalent Na(4)O4 tetrahedra, corners with two equivalent Na(5)O4 tetrahedra,  an edgeedge with one Mn(2)O6 octahedra,  an edgeedge with one Mn(5)O6 octahedra, and edges with four equivalent Mn(7)O6 octahedra. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Mn(1), one Mn(2), and one Mn(3) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Mn(2) and two equivalent Mn(3) atoms. In the third O site, O(3) is bonded to one Na(2), one Mn(1), and two equivalent Mn(3) atoms to form corner-sharing ONaMn3 tetrahedra. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Na(2), one Mn(4), and two equivalent Mn(6) atoms. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Na(1) and two equivalent Mn(6) atoms. In the sixth O site, O(6) is bonded to one Na(5), one Mn(1), and two equivalent Mn(3) atoms to form a mixture of corner and edge-sharing ONaMn3 tetrahedra. In the seventh O site, O(7) is bonded to one Na(1), one Mn(4), and two equivalent Mn(3) atoms to form a mixture of corner and edge-sharing ONaMn3 tetrahedra. In the eighth O site, O(8) is bonded to one Na(1), one Mn(1), one Mn(3), and one Mn(4) atom to form a mixture of corner and edge-sharing ONaMn3 tetrahedra. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Na(3), one Mn(5), and one Mn(6) atom. In the tenth O site, O(10) is bonded to one Na(4), one Mn(5), one Mn(7), and one Mn(8) atom to form a mixture of corner and edge-sharing ONaMn3 tetrahedra. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Na(2), one Mn(4), and one Mn(6) atom. In the twelfth O site, O(12) is bonded to one Na(4), one Mn(5), and two equivalent Mn(7) atoms to form a mixture of corner and edge-sharing ONaMn3 tetrahedra. In the thirteenth O site, O(13) is bonded in a distorted T-shaped geometry to one Mn(8) and two equivalent Mn(7) atoms. In the fourteenth O site, O(14) is bonded in a trigonal planar geometry to one Na(4) and two equivalent Mn(6) atoms. In the fifteenth O site, O(15) is bonded to one Na(3), one Mn(8), and two equivalent Mn(7) atoms to form a mixture of corner and edge-sharing ONaMn3 tetrahedra. In the sixteenth O site, O(16) is bonded in a rectangular see-saw-like geometry to one Na(3), one Mn(5), and two equivalent Mn(6) atoms. In the seventeenth O site, O(17) is bonded to one Na(5), one Mn(2), and two equivalent Mn(7) atoms to form a mixture of corner and edge-sharing ONaMn3 tetrahedra. In the eighteenth O site, O(18) is bonded to one Na(5), one Mn(2), one Mn(7), and one Mn(8) atom to form a mixture of corner and edge-sharing ONaMn3 tetrahedra. is represented by the CIF card [CIF]
data_Na5Mn11O24
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.136
_cell_length_b   6.136
_cell_length_c   14.844
_cell_angle_alpha   87.191
_cell_angle_beta   87.191
_cell_angle_gamma   58.567
_symmetry_Int_Tables_number   1
_cell_volume   476.140
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Na  Na0  1  0.350  0.350  0.698  1.0
  Na  Na1  1  0.004  0.004  0.624  1.0
  Na  Na2  1  0.997  0.997  0.377  1.0
  Na  Na3  1  0.649  0.649  0.304  1.0
  Na  Na4  1  0.674  0.674  0.043  1.0
  Mn  Mn5  1  0.837  0.837  0.839  1.0
  Mn  Mn6  1  1.000  1.000  0.998  1.0
  Mn  Mn7  1  0.838  0.339  0.836  1.0
  Mn  Mn8  1  0.339  0.838  0.836  1.0
  Mn  Mn9  1  0.682  0.682  0.668  1.0
  Mn  Mn10  1  0.318  0.318  0.333  1.0
  Mn  Mn11  1  0.500  0.000  0.501  1.0
  Mn  Mn12  1  0.000  0.500  0.501  1.0
  Mn  Mn13  1  0.163  0.658  0.164  1.0
  Mn  Mn14  1  0.658  0.163  0.164  1.0
  Mn  Mn15  1  0.164  0.164  0.161  1.0
  O  O16  1  0.145  0.719  0.915  1.0
  O  O17  1  0.719  0.145  0.915  1.0
  O  O18  1  0.142  0.142  0.912  1.0
  O  O19  1  0.007  0.007  0.773  1.0
  O  O20  1  0.819  0.819  0.572  1.0
  O  O21  1  0.323  0.323  0.555  1.0
  O  O22  1  0.664  0.664  0.901  1.0
  O  O23  1  0.537  0.537  0.760  1.0
  O  O24  1  0.535  0.962  0.764  1.0
  O  O25  1  0.146  0.599  0.401  1.0
  O  O26  1  0.599  0.146  0.401  1.0
  O  O27  1  0.962  0.535  0.764  1.0
  O  O28  1  0.035  0.465  0.234  1.0
  O  O29  1  0.465  0.035  0.234  1.0
  O  O30  1  0.401  0.855  0.599  1.0
  O  O31  1  0.855  0.401  0.599  1.0
  O  O32  1  0.462  0.462  0.239  1.0
  O  O33  1  0.335  0.335  0.096  1.0
  O  O34  1  0.678  0.678  0.446  1.0
  O  O35  1  0.992  0.992  0.228  1.0
  O  O36  1  0.181  0.181  0.428  1.0
  O  O37  1  0.860  0.860  0.089  1.0
  O  O38  1  0.856  0.279  0.086  1.0
  O  O39  1  0.279  0.856  0.086  1.0
[/CIF]
.