The compound described by CaMnAs2(H3O5)2 crystallizes in the triclinic P-1 space group. Ca(1) is bonded to one O(1), one O(3), one O(5), one O(8), and two equivalent O(4) atoms to form distorted CaO6 octahedra that share corners with two equivalent As(2)O4 tetrahedra, corners with three equivalent As(1)O4 tetrahedra,  an edgeedge with one Ca(1)O6 octahedra, and  an edgeedge with one Mn(1)O6 octahedra. Mn(1) is bonded to one O(3), one O(5), one O(6), one O(9), and two equivalent O(10) atoms to form MnO6 octahedra that share corners with two equivalent As(1)O4 tetrahedra, corners with three equivalent As(2)O4 tetrahedra,  an edgeedge with one Ca(1)O6 octahedra, and  an edgeedge with one Mn(1)O6 octahedra. There are two inequivalent As sites. In the first As site, As(1) is bonded to one O(2), one O(3), one O(4), and one O(9) atom to form AsO4 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra and corners with three equivalent Ca(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-62°. In the second As site, As(2) is bonded to one O(10), one O(5), one O(7), and one O(8) atom to form AsO4 tetrahedra that share corners with two equivalent Ca(1)O6 octahedra and corners with three equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-61°. There are six inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(2) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(1) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(1) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(6) atom. In the fifth H site, H(5) is bonded in a distorted single-bond geometry to one O(6) and one O(8) atom. In the sixth H site, H(6) is bonded in a distorted single-bond geometry to one O(7) and one O(9) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to one Ca(1), one H(2), and one H(3) atom. In the second O site, O(2) is bonded in a distorted water-like geometry to one As(1) and one H(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Ca(1), one Mn(1), and one As(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Ca(1) and one As(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Ca(1), one Mn(1), and one As(2) atom. In the sixth O site, O(6) is bonded in a distorted water-like geometry to one Mn(1), one H(4), and one H(5) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one As(2) and one H(6) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Ca(1), one As(2), and one H(5) atom. In the ninth O site, O(9) is bonded in a trigonal planar geometry to one Mn(1), one As(1), and one H(6) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to two equivalent Mn(1) and one As(2) atom. is represented by the CIF file [CIF]
data_CaMnAs2(H3O5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.051
_cell_length_b   7.745
_cell_length_c   8.578
_cell_angle_alpha   84.600
_cell_angle_beta   82.105
_cell_angle_gamma   81.569
_symmetry_Int_Tables_number   1
_cell_volume   457.668
_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  0.872  0.102  0.830  1.0
  Ca  Ca1  1  0.128  0.898  0.170  1.0
  Mn  Mn2  1  0.662  0.850  0.578  1.0
  Mn  Mn3  1  0.338  0.150  0.422  1.0
  As  As4  1  0.364  0.137  0.815  1.0
  As  As5  1  0.165  0.771  0.572  1.0
  As  As6  1  0.835  0.229  0.428  1.0
  As  As7  1  0.636  0.863  0.185  1.0
  H  H8  1  0.578  0.767  0.955  1.0
  H  H9  1  0.750  0.460  0.918  1.0
  H  H10  1  0.124  0.609  0.948  1.0
  H  H11  1  0.502  0.577  0.726  1.0
  H  H12  1  0.715  0.489  0.662  1.0
  H  H13  1  0.235  0.472  0.679  1.0
  H  H14  1  0.765  0.528  0.321  1.0
  H  H15  1  0.285  0.511  0.338  1.0
  H  H16  1  0.498  0.423  0.274  1.0
  H  H17  1  0.876  0.391  0.052  1.0
  H  H18  1  0.250  0.540  0.082  1.0
  H  H19  1  0.422  0.233  0.045  1.0
  O  O20  1  0.861  0.374  0.943  1.0
  O  O21  1  0.419  0.293  0.938  1.0
  O  O22  1  0.577  0.995  0.793  1.0
  O  O23  1  0.178  0.038  0.914  1.0
  O  O24  1  0.944  0.874  0.649  1.0
  O  O25  1  0.639  0.596  0.712  1.0
  O  O26  1  0.231  0.596  0.713  1.0
  O  O27  1  0.839  0.305  0.606  1.0
  O  O28  1  0.303  0.264  0.651  1.0
  O  O29  1  0.341  0.903  0.571  1.0
  O  O30  1  0.659  0.097  0.429  1.0
  O  O31  1  0.697  0.736  0.349  1.0
  O  O32  1  0.161  0.695  0.394  1.0
  O  O33  1  0.769  0.404  0.287  1.0
  O  O34  1  0.361  0.404  0.288  1.0
  O  O35  1  0.056  0.126  0.351  1.0
  O  O36  1  0.822  0.962  0.086  1.0
  O  O37  1  0.423  0.005  0.207  1.0
  O  O38  1  0.581  0.707  0.062  1.0
  O  O39  1  0.139  0.626  0.057  1.0
[/CIF]
.
The compound described by CaMnAs2(H3O5)2 crystallizes in the triclinic P-1 space group. Ca(1) is bonded to one O(1), one O(3), one O(5), one O(8), and two equivalent O(4) atoms to form distorted CaO6 octahedra that share corners with two equivalent As(2)O4 tetrahedra, corners with three equivalent As(1)O4 tetrahedra,  an edgeedge with one Ca(1)O6 octahedra, and  an edgeedge with one Mn(1)O6 octahedra. Mn(1) is bonded to one O(3), one O(5), one O(6), one O(9), and two equivalent O(10) atoms to form MnO6 octahedra that share corners with two equivalent As(1)O4 tetrahedra, corners with three equivalent As(2)O4 tetrahedra,  an edgeedge with one Ca(1)O6 octahedra, and  an edgeedge with one Mn(1)O6 octahedra. There are two inequivalent As sites. In the first As site, As(1) is bonded to one O(2), one O(3), one O(4), and one O(9) atom to form AsO4 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra and corners with three equivalent Ca(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-62°. In the second As site, As(2) is bonded to one O(10), one O(5), one O(7), and one O(8) atom to form AsO4 tetrahedra that share corners with two equivalent Ca(1)O6 octahedra and corners with three equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-61°. There are six inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(2) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(1) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(1) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(6) atom. In the fifth H site, H(5) is bonded in a distorted single-bond geometry to one O(6) and one O(8) atom. In the sixth H site, H(6) is bonded in a distorted single-bond geometry to one O(7) and one O(9) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to one Ca(1), one H(2), and one H(3) atom. In the second O site, O(2) is bonded in a distorted water-like geometry to one As(1) and one H(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Ca(1), one Mn(1), and one As(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Ca(1) and one As(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Ca(1), one Mn(1), and one As(2) atom. In the sixth O site, O(6) is bonded in a distorted water-like geometry to one Mn(1), one H(4), and one H(5) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one As(2) and one H(6) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Ca(1), one As(2), and one H(5) atom. In the ninth O site, O(9) is bonded in a trigonal planar geometry to one Mn(1), one As(1), and one H(6) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to two equivalent Mn(1) and one As(2) atom. is represented by the CIF file [CIF]
data_CaMnAs2(H3O5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.051
_cell_length_b   7.745
_cell_length_c   8.578
_cell_angle_alpha   84.600
_cell_angle_beta   82.105
_cell_angle_gamma   81.569
_symmetry_Int_Tables_number   1
_cell_volume   457.668
_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  0.872  0.102  0.830  1.0
  Ca  Ca1  1  0.128  0.898  0.170  1.0
  Mn  Mn2  1  0.662  0.850  0.578  1.0
  Mn  Mn3  1  0.338  0.150  0.422  1.0
  As  As4  1  0.364  0.137  0.815  1.0
  As  As5  1  0.165  0.771  0.572  1.0
  As  As6  1  0.835  0.229  0.428  1.0
  As  As7  1  0.636  0.863  0.185  1.0
  H  H8  1  0.578  0.767  0.955  1.0
  H  H9  1  0.750  0.460  0.918  1.0
  H  H10  1  0.124  0.609  0.948  1.0
  H  H11  1  0.502  0.577  0.726  1.0
  H  H12  1  0.715  0.489  0.662  1.0
  H  H13  1  0.235  0.472  0.679  1.0
  H  H14  1  0.765  0.528  0.321  1.0
  H  H15  1  0.285  0.511  0.338  1.0
  H  H16  1  0.498  0.423  0.274  1.0
  H  H17  1  0.876  0.391  0.052  1.0
  H  H18  1  0.250  0.540  0.082  1.0
  H  H19  1  0.422  0.233  0.045  1.0
  O  O20  1  0.861  0.374  0.943  1.0
  O  O21  1  0.419  0.293  0.938  1.0
  O  O22  1  0.577  0.995  0.793  1.0
  O  O23  1  0.178  0.038  0.914  1.0
  O  O24  1  0.944  0.874  0.649  1.0
  O  O25  1  0.639  0.596  0.712  1.0
  O  O26  1  0.231  0.596  0.713  1.0
  O  O27  1  0.839  0.305  0.606  1.0
  O  O28  1  0.303  0.264  0.651  1.0
  O  O29  1  0.341  0.903  0.571  1.0
  O  O30  1  0.659  0.097  0.429  1.0
  O  O31  1  0.697  0.736  0.349  1.0
  O  O32  1  0.161  0.695  0.394  1.0
  O  O33  1  0.769  0.404  0.287  1.0
  O  O34  1  0.361  0.404  0.288  1.0
  O  O35  1  0.056  0.126  0.351  1.0
  O  O36  1  0.822  0.962  0.086  1.0
  O  O37  1  0.423  0.005  0.207  1.0
  O  O38  1  0.581  0.707  0.062  1.0
  O  O39  1  0.139  0.626  0.057  1.0
[/CIF]
.