The compound described by Fe2CPH2O7 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(2), one O(5), one O(6), and one O(7) atom to form distorted FeO4 tetrahedra that share  a cornercorner with one Fe(2)O5 square pyramid and  a cornercorner with one P(1)O4 tetrahedra. In the second Fe site, Fe(2) is bonded to one O(1), one O(2), one O(3), and two equivalent O(4) atoms to form distorted FeO5 square pyramids that share corners with two equivalent Fe(2)O5 square pyramids,  a cornercorner with one Fe(1)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and  an edgeedge with one P(1)O4 tetrahedra. C(1) is bonded in a distorted bent 120 degrees geometry to one O(5) and one O(7) atom. P(1) is bonded to one O(1), one O(3), one O(4), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent Fe(2)O5 square pyramids,  a cornercorner with one Fe(1)O4 tetrahedra, and  an edgeedge with one Fe(2)O5 square pyramid. There are two 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. There are seven inequivalent O sites. In the first O site, O(3) is bonded in a bent 120 degrees geometry to one Fe(2) and one P(1) atom. In the second O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Fe(2) and one P(1) atom. In the third O site, O(5) is bonded in a water-like geometry to one Fe(1) and one C(1) atom. In the fourth O site, O(6) is bonded in a distorted linear geometry to one Fe(1) and one P(1) atom. In the fifth O site, O(7) is bonded in a water-like geometry to one Fe(1) and one C(1) atom. In the sixth O site, O(1) is bonded in a 3-coordinate geometry to one Fe(2), one P(1), and one H(2) atom. In the seventh O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Fe(1), one Fe(2), and one H(1) atom. is represented by the CIF card [CIF]
data_Fe2PH2CO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.758
_cell_length_b   7.812
_cell_length_c   17.197
_cell_angle_alpha   63.269
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   690.851
_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
  Fe  Fe0  1  0.961  0.785  0.340  1.0
  Fe  Fe1  1  0.461  0.215  0.160  1.0
  Fe  Fe2  1  0.039  0.215  0.660  1.0
  Fe  Fe3  1  0.539  0.785  0.840  1.0
  Fe  Fe4  1  0.485  0.362  0.322  1.0
  Fe  Fe5  1  0.985  0.638  0.178  1.0
  Fe  Fe6  1  0.515  0.638  0.678  1.0
  Fe  Fe7  1  0.015  0.362  0.822  1.0
  P  P8  1  0.502  0.782  0.145  1.0
  P  P9  1  0.002  0.218  0.355  1.0
  P  P10  1  0.498  0.218  0.855  1.0
  P  P11  1  0.998  0.782  0.645  1.0
  H  H12  1  0.342  0.911  0.696  1.0
  H  H13  1  0.842  0.089  0.804  1.0
  H  H14  1  0.658  0.089  0.304  1.0
  H  H15  1  0.158  0.911  0.196  1.0
  H  H16  1  0.743  0.969  0.546  1.0
  H  H17  1  0.243  0.031  0.954  1.0
  H  H18  1  0.257  0.031  0.454  1.0
  H  H19  1  0.757  0.969  0.046  1.0
  C  C20  1  0.872  0.520  0.510  1.0
  C  C21  1  0.372  0.480  0.990  1.0
  C  C22  1  0.128  0.480  0.490  1.0
  C  C23  1  0.628  0.520  0.010  1.0
  O  O24  1  0.274  0.169  0.922  1.0
  O  O25  1  0.774  0.831  0.578  1.0
  O  O26  1  0.726  0.831  0.078  1.0
  O  O27  1  0.226  0.169  0.422  1.0
  O  O28  1  0.989  0.157  0.781  1.0
  O  O29  1  0.489  0.843  0.719  1.0
  O  O30  1  0.011  0.843  0.219  1.0
  O  O31  1  0.511  0.157  0.281  1.0
  O  O32  1  0.702  0.278  0.894  1.0
  O  O33  1  0.202  0.722  0.606  1.0
  O  O34  1  0.298  0.722  0.106  1.0
  O  O35  1  0.798  0.278  0.394  1.0
  O  O36  1  0.892  0.613  0.726  1.0
  O  O37  1  0.392  0.387  0.774  1.0
  O  O38  1  0.108  0.387  0.274  1.0
  O  O39  1  0.608  0.613  0.226  1.0
  O  O40  1  0.298  0.576  0.913  1.0
  O  O41  1  0.798  0.424  0.587  1.0
  O  O42  1  0.702  0.424  0.087  1.0
  O  O43  1  0.202  0.576  0.413  1.0
  O  O44  1  0.047  0.960  0.657  1.0
  O  O45  1  0.547  0.040  0.843  1.0
  O  O46  1  0.953  0.040  0.343  1.0
  O  O47  1  0.453  0.960  0.157  1.0
  O  O48  1  0.741  0.646  0.947  1.0
  O  O49  1  0.241  0.354  0.553  1.0
  O  O50  1  0.259  0.354  0.053  1.0
  O  O51  1  0.759  0.646  0.447  1.0
[/CIF]
.
The compound described by Fe2CPH2O7 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(2), one O(5), one O(6), and one O(7) atom to form distorted FeO4 tetrahedra that share  a cornercorner with one Fe(2)O5 square pyramid and  a cornercorner with one P(1)O4 tetrahedra. In the second Fe site, Fe(2) is bonded to one O(1), one O(2), one O(3), and two equivalent O(4) atoms to form distorted FeO5 square pyramids that share corners with two equivalent Fe(2)O5 square pyramids,  a cornercorner with one Fe(1)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and  an edgeedge with one P(1)O4 tetrahedra. C(1) is bonded in a distorted bent 120 degrees geometry to one O(5) and one O(7) atom. P(1) is bonded to one O(1), one O(3), one O(4), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent Fe(2)O5 square pyramids,  a cornercorner with one Fe(1)O4 tetrahedra, and  an edgeedge with one Fe(2)O5 square pyramid. There are two 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. There are seven inequivalent O sites. In the first O site, O(3) is bonded in a bent 120 degrees geometry to one Fe(2) and one P(1) atom. In the second O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Fe(2) and one P(1) atom. In the third O site, O(5) is bonded in a water-like geometry to one Fe(1) and one C(1) atom. In the fourth O site, O(6) is bonded in a distorted linear geometry to one Fe(1) and one P(1) atom. In the fifth O site, O(7) is bonded in a water-like geometry to one Fe(1) and one C(1) atom. In the sixth O site, O(1) is bonded in a 3-coordinate geometry to one Fe(2), one P(1), and one H(2) atom. In the seventh O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Fe(1), one Fe(2), and one H(1) atom. is represented by the CIF card [CIF]
data_Fe2PH2CO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.758
_cell_length_b   7.812
_cell_length_c   17.197
_cell_angle_alpha   63.269
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   690.851
_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
  Fe  Fe0  1  0.961  0.785  0.340  1.0
  Fe  Fe1  1  0.461  0.215  0.160  1.0
  Fe  Fe2  1  0.039  0.215  0.660  1.0
  Fe  Fe3  1  0.539  0.785  0.840  1.0
  Fe  Fe4  1  0.485  0.362  0.322  1.0
  Fe  Fe5  1  0.985  0.638  0.178  1.0
  Fe  Fe6  1  0.515  0.638  0.678  1.0
  Fe  Fe7  1  0.015  0.362  0.822  1.0
  P  P8  1  0.502  0.782  0.145  1.0
  P  P9  1  0.002  0.218  0.355  1.0
  P  P10  1  0.498  0.218  0.855  1.0
  P  P11  1  0.998  0.782  0.645  1.0
  H  H12  1  0.342  0.911  0.696  1.0
  H  H13  1  0.842  0.089  0.804  1.0
  H  H14  1  0.658  0.089  0.304  1.0
  H  H15  1  0.158  0.911  0.196  1.0
  H  H16  1  0.743  0.969  0.546  1.0
  H  H17  1  0.243  0.031  0.954  1.0
  H  H18  1  0.257  0.031  0.454  1.0
  H  H19  1  0.757  0.969  0.046  1.0
  C  C20  1  0.872  0.520  0.510  1.0
  C  C21  1  0.372  0.480  0.990  1.0
  C  C22  1  0.128  0.480  0.490  1.0
  C  C23  1  0.628  0.520  0.010  1.0
  O  O24  1  0.274  0.169  0.922  1.0
  O  O25  1  0.774  0.831  0.578  1.0
  O  O26  1  0.726  0.831  0.078  1.0
  O  O27  1  0.226  0.169  0.422  1.0
  O  O28  1  0.989  0.157  0.781  1.0
  O  O29  1  0.489  0.843  0.719  1.0
  O  O30  1  0.011  0.843  0.219  1.0
  O  O31  1  0.511  0.157  0.281  1.0
  O  O32  1  0.702  0.278  0.894  1.0
  O  O33  1  0.202  0.722  0.606  1.0
  O  O34  1  0.298  0.722  0.106  1.0
  O  O35  1  0.798  0.278  0.394  1.0
  O  O36  1  0.892  0.613  0.726  1.0
  O  O37  1  0.392  0.387  0.774  1.0
  O  O38  1  0.108  0.387  0.274  1.0
  O  O39  1  0.608  0.613  0.226  1.0
  O  O40  1  0.298  0.576  0.913  1.0
  O  O41  1  0.798  0.424  0.587  1.0
  O  O42  1  0.702  0.424  0.087  1.0
  O  O43  1  0.202  0.576  0.413  1.0
  O  O44  1  0.047  0.960  0.657  1.0
  O  O45  1  0.547  0.040  0.843  1.0
  O  O46  1  0.953  0.040  0.343  1.0
  O  O47  1  0.453  0.960  0.157  1.0
  O  O48  1  0.741  0.646  0.947  1.0
  O  O49  1  0.241  0.354  0.553  1.0
  O  O50  1  0.259  0.354  0.053  1.0
  O  O51  1  0.759  0.646  0.447  1.0
[/CIF]
.