The crystal structure described by CaMnSiHO5 is Esseneite-derived structured and crystallizes in the orthorhombic P2_12_12_1 space group. Ca(1) is bonded in a 8-coordinate geometry to one O(2), one O(3), two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms. Mn(1) is bonded to one O(1), one O(5), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with four equivalent Si(1)O4 tetrahedra and edges with two equivalent Mn(1)O6 octahedra. Si(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-57°. H(1) is bonded in a linear geometry to one O(2) and one O(4) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Ca(1), one Mn(1), and one Si(1) atom. In the second O site, O(2) is bonded to one Ca(1), two equivalent Mn(1), and one H(1) atom to form distorted OCaMn2H tetrahedra that share corners with two equivalent O(2)CaMn2H tetrahedra, corners with three equivalent O(3)CaMn2Si trigonal pyramids, and  an edgeedge with one O(3)CaMn2Si trigonal pyramid. In the third O site, O(3) is bonded to one Ca(1), two equivalent Mn(1), and one Si(1) atom to form distorted OCaMn2Si trigonal pyramids that share corners with three equivalent O(2)CaMn2H tetrahedra, corners with two equivalent O(3)CaMn2Si trigonal pyramids, and  an edgeedge with one O(2)CaMn2H tetrahedra. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Ca(1), one Si(1), and one H(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Ca(1), one Mn(1), and one Si(1) atom. is represented by the CIF file [CIF]
data_CaMnSiHO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.949
_cell_length_b   7.321
_cell_length_c   8.779
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   382.362
_cell_formula_units_Z   4
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  0.520  0.122  0.323  1.0
  Ca  Ca1  1  0.980  0.878  0.823  1.0
  Ca  Ca2  1  0.480  0.622  0.177  1.0
  Ca  Ca3  1  0.020  0.378  0.677  1.0
  Mn  Mn4  1  0.746  0.257  0.996  1.0
  Mn  Mn5  1  0.254  0.757  0.504  1.0
  Mn  Mn6  1  0.754  0.743  0.496  1.0
  Mn  Mn7  1  0.246  0.243  0.004  1.0
  Si  Si8  1  0.988  0.366  0.319  1.0
  Si  Si9  1  0.488  0.134  0.681  1.0
  Si  Si10  1  0.012  0.866  0.181  1.0
  Si  Si11  1  0.512  0.634  0.819  1.0
  H  H12  1  0.474  0.430  0.523  1.0
  H  H13  1  0.974  0.070  0.477  1.0
  H  H14  1  0.526  0.930  0.977  1.0
  H  H15  1  0.026  0.570  0.023  1.0
  O  O16  1  0.738  0.626  0.710  1.0
  O  O17  1  0.997  0.895  0.559  1.0
  O  O18  1  0.503  0.105  0.059  1.0
  O  O19  1  0.003  0.395  0.941  1.0
  O  O20  1  0.762  0.374  0.210  1.0
  O  O21  1  0.262  0.126  0.790  1.0
  O  O22  1  0.238  0.874  0.290  1.0
  O  O23  1  0.497  0.605  0.441  1.0
  O  O24  1  0.491  0.459  0.936  1.0
  O  O25  1  0.991  0.041  0.064  1.0
  O  O26  1  0.509  0.959  0.564  1.0
  O  O27  1  0.009  0.541  0.436  1.0
  O  O28  1  0.078  0.700  0.058  1.0
  O  O29  1  0.578  0.800  0.942  1.0
  O  O30  1  0.226  0.338  0.225  1.0
  O  O31  1  0.422  0.300  0.558  1.0
  O  O32  1  0.274  0.662  0.725  1.0
  O  O33  1  0.774  0.838  0.275  1.0
  O  O34  1  0.726  0.162  0.775  1.0
  O  O35  1  0.922  0.200  0.442  1.0
[/CIF]
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The crystal structure described by CaMnSiHO5 is Esseneite-derived structured and crystallizes in the orthorhombic P2_12_12_1 space group. Ca(1) is bonded in a 8-coordinate geometry to one O(2), one O(3), two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms. Mn(1) is bonded to one O(1), one O(5), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with four equivalent Si(1)O4 tetrahedra and edges with two equivalent Mn(1)O6 octahedra. Si(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-57°. H(1) is bonded in a linear geometry to one O(2) and one O(4) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Ca(1), one Mn(1), and one Si(1) atom. In the second O site, O(2) is bonded to one Ca(1), two equivalent Mn(1), and one H(1) atom to form distorted OCaMn2H tetrahedra that share corners with two equivalent O(2)CaMn2H tetrahedra, corners with three equivalent O(3)CaMn2Si trigonal pyramids, and  an edgeedge with one O(3)CaMn2Si trigonal pyramid. In the third O site, O(3) is bonded to one Ca(1), two equivalent Mn(1), and one Si(1) atom to form distorted OCaMn2Si trigonal pyramids that share corners with three equivalent O(2)CaMn2H tetrahedra, corners with two equivalent O(3)CaMn2Si trigonal pyramids, and  an edgeedge with one O(2)CaMn2H tetrahedra. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Ca(1), one Si(1), and one H(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Ca(1), one Mn(1), and one Si(1) atom. is represented by the CIF file [CIF]
data_CaMnSiHO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.949
_cell_length_b   7.321
_cell_length_c   8.779
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   382.362
_cell_formula_units_Z   4
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  0.520  0.122  0.323  1.0
  Ca  Ca1  1  0.980  0.878  0.823  1.0
  Ca  Ca2  1  0.480  0.622  0.177  1.0
  Ca  Ca3  1  0.020  0.378  0.677  1.0
  Mn  Mn4  1  0.746  0.257  0.996  1.0
  Mn  Mn5  1  0.254  0.757  0.504  1.0
  Mn  Mn6  1  0.754  0.743  0.496  1.0
  Mn  Mn7  1  0.246  0.243  0.004  1.0
  Si  Si8  1  0.988  0.366  0.319  1.0
  Si  Si9  1  0.488  0.134  0.681  1.0
  Si  Si10  1  0.012  0.866  0.181  1.0
  Si  Si11  1  0.512  0.634  0.819  1.0
  H  H12  1  0.474  0.430  0.523  1.0
  H  H13  1  0.974  0.070  0.477  1.0
  H  H14  1  0.526  0.930  0.977  1.0
  H  H15  1  0.026  0.570  0.023  1.0
  O  O16  1  0.738  0.626  0.710  1.0
  O  O17  1  0.997  0.895  0.559  1.0
  O  O18  1  0.503  0.105  0.059  1.0
  O  O19  1  0.003  0.395  0.941  1.0
  O  O20  1  0.762  0.374  0.210  1.0
  O  O21  1  0.262  0.126  0.790  1.0
  O  O22  1  0.238  0.874  0.290  1.0
  O  O23  1  0.497  0.605  0.441  1.0
  O  O24  1  0.491  0.459  0.936  1.0
  O  O25  1  0.991  0.041  0.064  1.0
  O  O26  1  0.509  0.959  0.564  1.0
  O  O27  1  0.009  0.541  0.436  1.0
  O  O28  1  0.078  0.700  0.058  1.0
  O  O29  1  0.578  0.800  0.942  1.0
  O  O30  1  0.226  0.338  0.225  1.0
  O  O31  1  0.422  0.300  0.558  1.0
  O  O32  1  0.274  0.662  0.725  1.0
  O  O33  1  0.774  0.838  0.275  1.0
  O  O34  1  0.726  0.162  0.775  1.0
  O  O35  1  0.922  0.200  0.442  1.0
[/CIF]
.