The structure described by RbMgCu2H3(SO5)2 crystallizes in the triclinic P1 space group. Rb(1) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(2), one O(4), one O(7), one O(8), and one O(9) atom. Mg(1) is bonded to one O(3), one O(4), one O(6), one O(8), and one O(9) atom to form distorted MgO5 trigonal bipyramids that share  a cornercorner with one S(1)O4 tetrahedra,  a cornercorner with one S(2)O4 tetrahedra, and  an edgeedge with one S(2)O4 tetrahedra. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted T-shaped geometry to one O(2), one O(5), and one O(6) atom. In the second Cu site, Cu(2) is bonded in a 3-coordinate geometry to one O(1), one O(3), and one O(7) atom. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(5) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(6) atom. In the third H site, H(3) is bonded in a distorted single-bond geometry to one O(5) and one O(6) atom. There are two inequivalent S sites. In the first S site, S(1) is bonded to one O(1), one O(2), one O(7), and one O(9) atom to form SO4 tetrahedra that share  a cornercorner with one Mg(1)O5 trigonal bipyramid. In the second S site, S(2) is bonded to one O(10), one O(3), one O(4), and one O(8) atom to form SO4 tetrahedra that share  a cornercorner with one Mg(1)O5 trigonal bipyramid and  an edgeedge with one Mg(1)O5 trigonal bipyramid. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Rb(1), one Cu(2), and one S(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Rb(1), one Cu(1), and one S(1) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Cu(2), and one S(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Rb(1), one Mg(1), and one S(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Cu(1), one H(1), and one H(3) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Mg(1), one Cu(1), one H(2), and one H(3) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Rb(1), one Cu(2), and one S(1) atom. In the eighth O site, O(8) is bonded in a distorted L-shaped geometry to one Rb(1), one Mg(1), and one S(2) atom. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to one Rb(1), one Mg(1), and one S(1) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Rb(1) and one S(2) atom. is represented by the CIF file [CIF]
data_RbMgCu2H3(SO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.455
_cell_length_b   6.980
_cell_length_c   8.516
_cell_angle_alpha   68.438
_cell_angle_beta   83.377
_cell_angle_gamma   119.586
_symmetry_Int_Tables_number   1
_cell_volume   243.957
_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
  Rb  Rb0  1  0.538  0.006  0.528  1.0
  Mg  Mg1  1  0.421  0.632  0.265  1.0
  Cu  Cu2  1  0.029  0.537  0.991  1.0
  Cu  Cu3  1  0.342  0.011  0.947  1.0
  H  H4  1  0.753  0.582  0.775  1.0
  H  H5  1  0.151  0.290  0.170  1.0
  H  H6  1  0.556  0.524  0.966  1.0
  S  S7  1  0.092  0.261  0.712  1.0
  S  S8  1  0.941  0.759  0.332  1.0
  O  O9  1  0.767  0.059  0.828  1.0
  O  O10  1  0.224  0.469  0.754  1.0
  O  O11  1  0.262  0.866  0.213  1.0
  O  O12  1  0.718  0.522  0.333  1.0
  O  O13  1  0.714  0.512  0.905  1.0
  O  O14  1  0.274  0.476  0.113  1.0
  O  O15  1  0.266  0.145  0.732  1.0
  O  O16  1  0.855  0.936  0.242  1.0
  O  O17  1  0.120  0.363  0.516  1.0
  O  O18  1  0.946  0.734  0.508  1.0
[/CIF]
.
The structure described by RbMgCu2H3(SO5)2 crystallizes in the triclinic P1 space group. Rb(1) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(2), one O(4), one O(7), one O(8), and one O(9) atom. Mg(1) is bonded to one O(3), one O(4), one O(6), one O(8), and one O(9) atom to form distorted MgO5 trigonal bipyramids that share  a cornercorner with one S(1)O4 tetrahedra,  a cornercorner with one S(2)O4 tetrahedra, and  an edgeedge with one S(2)O4 tetrahedra. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted T-shaped geometry to one O(2), one O(5), and one O(6) atom. In the second Cu site, Cu(2) is bonded in a 3-coordinate geometry to one O(1), one O(3), and one O(7) atom. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(5) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(6) atom. In the third H site, H(3) is bonded in a distorted single-bond geometry to one O(5) and one O(6) atom. There are two inequivalent S sites. In the first S site, S(1) is bonded to one O(1), one O(2), one O(7), and one O(9) atom to form SO4 tetrahedra that share  a cornercorner with one Mg(1)O5 trigonal bipyramid. In the second S site, S(2) is bonded to one O(10), one O(3), one O(4), and one O(8) atom to form SO4 tetrahedra that share  a cornercorner with one Mg(1)O5 trigonal bipyramid and  an edgeedge with one Mg(1)O5 trigonal bipyramid. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Rb(1), one Cu(2), and one S(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Rb(1), one Cu(1), and one S(1) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Cu(2), and one S(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Rb(1), one Mg(1), and one S(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Cu(1), one H(1), and one H(3) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Mg(1), one Cu(1), one H(2), and one H(3) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Rb(1), one Cu(2), and one S(1) atom. In the eighth O site, O(8) is bonded in a distorted L-shaped geometry to one Rb(1), one Mg(1), and one S(2) atom. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to one Rb(1), one Mg(1), and one S(1) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Rb(1) and one S(2) atom. is represented by the CIF file [CIF]
data_RbMgCu2H3(SO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.455
_cell_length_b   6.980
_cell_length_c   8.516
_cell_angle_alpha   68.438
_cell_angle_beta   83.377
_cell_angle_gamma   119.586
_symmetry_Int_Tables_number   1
_cell_volume   243.957
_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
  Rb  Rb0  1  0.538  0.006  0.528  1.0
  Mg  Mg1  1  0.421  0.632  0.265  1.0
  Cu  Cu2  1  0.029  0.537  0.991  1.0
  Cu  Cu3  1  0.342  0.011  0.947  1.0
  H  H4  1  0.753  0.582  0.775  1.0
  H  H5  1  0.151  0.290  0.170  1.0
  H  H6  1  0.556  0.524  0.966  1.0
  S  S7  1  0.092  0.261  0.712  1.0
  S  S8  1  0.941  0.759  0.332  1.0
  O  O9  1  0.767  0.059  0.828  1.0
  O  O10  1  0.224  0.469  0.754  1.0
  O  O11  1  0.262  0.866  0.213  1.0
  O  O12  1  0.718  0.522  0.333  1.0
  O  O13  1  0.714  0.512  0.905  1.0
  O  O14  1  0.274  0.476  0.113  1.0
  O  O15  1  0.266  0.145  0.732  1.0
  O  O16  1  0.855  0.936  0.242  1.0
  O  O17  1  0.120  0.363  0.516  1.0
  O  O18  1  0.946  0.734  0.508  1.0
[/CIF]
.