The crystal structure described by Ca2MnAl2Si3HO13 crystallizes in the monoclinic P2_1/m space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 6-coordinate geometry to one O(5), one O(7), two equivalent O(1), and two equivalent O(3) atoms. In the second Ca site, Ca(2) is bonded in a 10-coordinate geometry to one O(10), one O(7), two equivalent O(3), two equivalent O(8), and four equivalent O(2) atoms. Mn(1) is bonded to one O(4), one O(8), two equivalent O(1), and two equivalent O(2) atoms to form distorted MnO6 octahedra that share  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 edges with two equivalent Al(1)O6 octahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms to form AlO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with two equivalent Al(1)O6 octahedra. In the second Al site, Al(2) is bonded to two equivalent O(10), two equivalent O(3), and two equivalent O(6) atoms to form AlO6 octahedra that share corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and edges with two equivalent Al(2)O6 octahedra. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(7), one O(9), and two equivalent O(1) atoms to form SiO4 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Al(1)O6 octahedra, and  a cornercorner with one Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-57°. In the second Si site, Si(2) is bonded to one O(8), one O(9), and two equivalent O(3) atoms to form SiO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra, corners with two equivalent Al(2)O6 octahedra, and  a cornercorner with one Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 42-54°. In the third Si site, Si(3) is bonded to one O(5), one O(6), and two equivalent O(2) atoms to form SiO4 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Al(1)O6 octahedra, and corners with two equivalent Al(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-53°. H(1) is bonded in a single-bond geometry to one O(10) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Ca(1), one Mn(1), one Al(1), and one Si(1) atom to form a mixture of distorted corner and edge-sharing OCaMnAlSi tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Ca(2), one Mn(1), and one Si(3) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Ca(1), one Ca(2), one Al(2), and one Si(2) atom. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Mn(1) and two equivalent Al(1) atoms. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Ca(1), two equivalent Al(1), and one Si(3) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to two equivalent Al(2) and one Si(3) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Ca(1), one Ca(2), and one Si(1) atom. In the eighth O site, O(8) is bonded in a distorted bent 150 degrees geometry to two equivalent Ca(2), one Mn(1), and one Si(2) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Si(1) and one Si(2) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Ca(2), two equivalent Al(2), and one H(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ca2MnAl2Si3HO13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.763
_cell_length_b   8.946
_cell_length_c   10.248
_cell_angle_alpha   64.453
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   476.654
_cell_formula_units_Z   2
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
  Ca  Ca0  1  0.250  0.246  0.153  1.0
  Ca  Ca1  1  0.750  0.754  0.847  1.0
  Ca  Ca2  1  0.250  0.403  0.427  1.0
  Ca  Ca3  1  0.750  0.597  0.573  1.0
  Mn  Mn4  1  0.750  0.704  0.221  1.0
  Mn  Mn5  1  0.250  0.296  0.779  1.0
  Al  Al6  1  0.500  0.000  0.000  1.0
  Al  Al7  1  0.000  0.000  0.000  1.0
  Al  Al8  1  0.500  0.000  0.500  1.0
  Al  Al9  1  0.000  0.000  0.500  1.0
  Si  Si10  1  0.250  0.661  0.045  1.0
  Si  Si11  1  0.750  0.339  0.955  1.0
  Si  Si12  1  0.750  0.315  0.274  1.0
  Si  Si13  1  0.250  0.685  0.726  1.0
  Si  Si14  1  0.250  0.813  0.320  1.0
  Si  Si15  1  0.750  0.187  0.680  1.0
  H  H16  1  0.750  0.941  0.330  1.0
  H  H17  1  0.250  0.059  0.670  1.0
  O  O18  1  0.490  0.771  0.032  1.0
  O  O19  1  0.990  0.229  0.968  1.0
  O  O20  1  0.510  0.229  0.968  1.0
  O  O21  1  0.010  0.771  0.032  1.0
  O  O22  1  0.478  0.692  0.358  1.0
  O  O23  1  0.978  0.308  0.642  1.0
  O  O24  1  0.522  0.308  0.642  1.0
  O  O25  1  0.022  0.692  0.358  1.0
  O  O26  1  0.517  0.202  0.335  1.0
  O  O27  1  0.017  0.798  0.665  1.0
  O  O28  1  0.483  0.798  0.665  1.0
  O  O29  1  0.983  0.202  0.335  1.0
  O  O30  1  0.750  0.941  0.131  1.0
  O  O31  1  0.250  0.059  0.869  1.0
  O  O32  1  0.250  0.955  0.145  1.0
  O  O33  1  0.750  0.045  0.855  1.0
  O  O34  1  0.250  0.931  0.408  1.0
  O  O35  1  0.750  0.069  0.592  1.0
  O  O36  1  0.250  0.488  0.185  1.0
  O  O37  1  0.750  0.512  0.815  1.0
  O  O38  1  0.750  0.470  0.317  1.0
  O  O39  1  0.250  0.530  0.683  1.0
  O  O40  1  0.750  0.385  0.095  1.0
  O  O41  1  0.250  0.615  0.905  1.0
  O  O42  1  0.750  0.912  0.434  1.0
  O  O43  1  0.250  0.088  0.566  1.0
[/CIF]
.
The crystal structure described by Ca2MnAl2Si3HO13 crystallizes in the monoclinic P2_1/m space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 6-coordinate geometry to one O(5), one O(7), two equivalent O(1), and two equivalent O(3) atoms. In the second Ca site, Ca(2) is bonded in a 10-coordinate geometry to one O(10), one O(7), two equivalent O(3), two equivalent O(8), and four equivalent O(2) atoms. Mn(1) is bonded to one O(4), one O(8), two equivalent O(1), and two equivalent O(2) atoms to form distorted MnO6 octahedra that share  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 edges with two equivalent Al(1)O6 octahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms to form AlO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with two equivalent Al(1)O6 octahedra. In the second Al site, Al(2) is bonded to two equivalent O(10), two equivalent O(3), and two equivalent O(6) atoms to form AlO6 octahedra that share corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and edges with two equivalent Al(2)O6 octahedra. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(7), one O(9), and two equivalent O(1) atoms to form SiO4 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Al(1)O6 octahedra, and  a cornercorner with one Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-57°. In the second Si site, Si(2) is bonded to one O(8), one O(9), and two equivalent O(3) atoms to form SiO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra, corners with two equivalent Al(2)O6 octahedra, and  a cornercorner with one Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 42-54°. In the third Si site, Si(3) is bonded to one O(5), one O(6), and two equivalent O(2) atoms to form SiO4 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Al(1)O6 octahedra, and corners with two equivalent Al(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-53°. H(1) is bonded in a single-bond geometry to one O(10) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Ca(1), one Mn(1), one Al(1), and one Si(1) atom to form a mixture of distorted corner and edge-sharing OCaMnAlSi tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Ca(2), one Mn(1), and one Si(3) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Ca(1), one Ca(2), one Al(2), and one Si(2) atom. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Mn(1) and two equivalent Al(1) atoms. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Ca(1), two equivalent Al(1), and one Si(3) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to two equivalent Al(2) and one Si(3) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Ca(1), one Ca(2), and one Si(1) atom. In the eighth O site, O(8) is bonded in a distorted bent 150 degrees geometry to two equivalent Ca(2), one Mn(1), and one Si(2) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Si(1) and one Si(2) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Ca(2), two equivalent Al(2), and one H(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ca2MnAl2Si3HO13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.763
_cell_length_b   8.946
_cell_length_c   10.248
_cell_angle_alpha   64.453
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   476.654
_cell_formula_units_Z   2
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
  Ca  Ca0  1  0.250  0.246  0.153  1.0
  Ca  Ca1  1  0.750  0.754  0.847  1.0
  Ca  Ca2  1  0.250  0.403  0.427  1.0
  Ca  Ca3  1  0.750  0.597  0.573  1.0
  Mn  Mn4  1  0.750  0.704  0.221  1.0
  Mn  Mn5  1  0.250  0.296  0.779  1.0
  Al  Al6  1  0.500  0.000  0.000  1.0
  Al  Al7  1  0.000  0.000  0.000  1.0
  Al  Al8  1  0.500  0.000  0.500  1.0
  Al  Al9  1  0.000  0.000  0.500  1.0
  Si  Si10  1  0.250  0.661  0.045  1.0
  Si  Si11  1  0.750  0.339  0.955  1.0
  Si  Si12  1  0.750  0.315  0.274  1.0
  Si  Si13  1  0.250  0.685  0.726  1.0
  Si  Si14  1  0.250  0.813  0.320  1.0
  Si  Si15  1  0.750  0.187  0.680  1.0
  H  H16  1  0.750  0.941  0.330  1.0
  H  H17  1  0.250  0.059  0.670  1.0
  O  O18  1  0.490  0.771  0.032  1.0
  O  O19  1  0.990  0.229  0.968  1.0
  O  O20  1  0.510  0.229  0.968  1.0
  O  O21  1  0.010  0.771  0.032  1.0
  O  O22  1  0.478  0.692  0.358  1.0
  O  O23  1  0.978  0.308  0.642  1.0
  O  O24  1  0.522  0.308  0.642  1.0
  O  O25  1  0.022  0.692  0.358  1.0
  O  O26  1  0.517  0.202  0.335  1.0
  O  O27  1  0.017  0.798  0.665  1.0
  O  O28  1  0.483  0.798  0.665  1.0
  O  O29  1  0.983  0.202  0.335  1.0
  O  O30  1  0.750  0.941  0.131  1.0
  O  O31  1  0.250  0.059  0.869  1.0
  O  O32  1  0.250  0.955  0.145  1.0
  O  O33  1  0.750  0.045  0.855  1.0
  O  O34  1  0.250  0.931  0.408  1.0
  O  O35  1  0.750  0.069  0.592  1.0
  O  O36  1  0.250  0.488  0.185  1.0
  O  O37  1  0.750  0.512  0.815  1.0
  O  O38  1  0.750  0.470  0.317  1.0
  O  O39  1  0.250  0.530  0.683  1.0
  O  O40  1  0.750  0.385  0.095  1.0
  O  O41  1  0.250  0.615  0.905  1.0
  O  O42  1  0.750  0.912  0.434  1.0
  O  O43  1  0.250  0.088  0.566  1.0
[/CIF]
.