The structure described by RbMgCu2H3(SO5)2 crystallizes in the triclinic P1 space group. Rb(1) is bonded to one O(1), one O(10), one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form distorted RbO7 pentagonal bipyramids that share corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent S(2)O4 tetrahedra, corners with three equivalent S(1)O4 tetrahedra, and  an edgeedge with one S(2)O4 tetrahedra. Mg(1) is bonded to one O(3), one O(4), one O(6), and one O(9) atom to form MgO4 tetrahedra that share corners with two equivalent Rb(1)O7 pentagonal bipyramids,  a cornercorner with one S(1)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 4-coordinate geometry to one O(2), one O(5), one O(6), and one O(7) atom. In the second Cu site, Cu(2) is bonded in a 5-coordinate geometry to one O(1), one O(5), one O(6), one O(7), and one O(8) atom. There are three inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one O(10) and 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 single-bond geometry to one O(5) 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 corners with three equivalent Rb(1)O7 pentagonal bipyramids and  a cornercorner with one Mg(1)O4 tetrahedra. 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 corners with two equivalent Rb(1)O7 pentagonal bipyramids,  an edgeedge with one Rb(1)O7 pentagonal bipyramid, and  an edgeedge with one Mg(1)O4 tetrahedra. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 3-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 3-coordinate geometry to one Rb(1), one Cu(1), and one S(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Rb(1), one Mg(1), 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 water-like geometry to one Cu(1), one Cu(2), one H(1), and one H(3) atom. In the sixth O site, O(6) is bonded in a distorted tetrahedral geometry to one Mg(1), one Cu(1), one Cu(2), and one H(2) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Rb(1), one Cu(1), one Cu(2), and one S(1) atom. In the eighth O site, O(8) is bonded in a single-bond geometry to one Rb(1), one Cu(2), and one S(2) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Mg(1) and one S(1) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to one Rb(1), one H(1), and one S(2) atom. is represented by the CIF card [CIF]
data_RbMgCu2H3(SO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.014
_cell_length_b   6.097
_cell_length_c   8.764
_cell_angle_alpha   63.113
_cell_angle_beta   93.972
_cell_angle_gamma   116.454
_symmetry_Int_Tables_number   1
_cell_volume   253.082
_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  0.474  0.984  0.540  1.0
  Mg  Mg1  1  0.120  0.599  0.291  1.0
  Cu  Cu2  1  0.042  0.494  0.966  1.0
  Cu  Cu3  1  0.547  0.986  0.963  1.0
  H  H4  1  0.760  0.508  0.731  1.0
  H  H5  1  0.367  0.473  0.155  1.0
  H  H6  1  0.614  0.478  0.886  1.0
  S  S7  1  0.089  0.199  0.721  1.0
  S  S8  1  0.850  0.804  0.343  1.0
  O  O9  1  0.812  0.030  0.782  1.0
  O  O10  1  0.200  0.408  0.785  1.0
  O  O11  1  0.135  0.941  0.295  1.0
  O  O12  1  0.763  0.564  0.301  1.0
  O  O13  1  0.723  0.412  0.863  1.0
  O  O14  1  0.290  0.597  0.109  1.0
  O  O15  1  0.212  0.018  0.777  1.0
  O  O16  1  0.746  0.995  0.241  1.0
  O  O17  1  0.137  0.352  0.524  1.0
  O  O18  1  0.778  0.698  0.530  1.0
[/CIF]
.
The structure described by RbMgCu2H3(SO5)2 crystallizes in the triclinic P1 space group. Rb(1) is bonded to one O(1), one O(10), one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form distorted RbO7 pentagonal bipyramids that share corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent S(2)O4 tetrahedra, corners with three equivalent S(1)O4 tetrahedra, and  an edgeedge with one S(2)O4 tetrahedra. Mg(1) is bonded to one O(3), one O(4), one O(6), and one O(9) atom to form MgO4 tetrahedra that share corners with two equivalent Rb(1)O7 pentagonal bipyramids,  a cornercorner with one S(1)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 4-coordinate geometry to one O(2), one O(5), one O(6), and one O(7) atom. In the second Cu site, Cu(2) is bonded in a 5-coordinate geometry to one O(1), one O(5), one O(6), one O(7), and one O(8) atom. There are three inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one O(10) and 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 single-bond geometry to one O(5) 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 corners with three equivalent Rb(1)O7 pentagonal bipyramids and  a cornercorner with one Mg(1)O4 tetrahedra. 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 corners with two equivalent Rb(1)O7 pentagonal bipyramids,  an edgeedge with one Rb(1)O7 pentagonal bipyramid, and  an edgeedge with one Mg(1)O4 tetrahedra. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 3-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 3-coordinate geometry to one Rb(1), one Cu(1), and one S(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Rb(1), one Mg(1), 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 water-like geometry to one Cu(1), one Cu(2), one H(1), and one H(3) atom. In the sixth O site, O(6) is bonded in a distorted tetrahedral geometry to one Mg(1), one Cu(1), one Cu(2), and one H(2) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Rb(1), one Cu(1), one Cu(2), and one S(1) atom. In the eighth O site, O(8) is bonded in a single-bond geometry to one Rb(1), one Cu(2), and one S(2) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Mg(1) and one S(1) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to one Rb(1), one H(1), and one S(2) atom. is represented by the CIF card [CIF]
data_RbMgCu2H3(SO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.014
_cell_length_b   6.097
_cell_length_c   8.764
_cell_angle_alpha   63.113
_cell_angle_beta   93.972
_cell_angle_gamma   116.454
_symmetry_Int_Tables_number   1
_cell_volume   253.082
_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  0.474  0.984  0.540  1.0
  Mg  Mg1  1  0.120  0.599  0.291  1.0
  Cu  Cu2  1  0.042  0.494  0.966  1.0
  Cu  Cu3  1  0.547  0.986  0.963  1.0
  H  H4  1  0.760  0.508  0.731  1.0
  H  H5  1  0.367  0.473  0.155  1.0
  H  H6  1  0.614  0.478  0.886  1.0
  S  S7  1  0.089  0.199  0.721  1.0
  S  S8  1  0.850  0.804  0.343  1.0
  O  O9  1  0.812  0.030  0.782  1.0
  O  O10  1  0.200  0.408  0.785  1.0
  O  O11  1  0.135  0.941  0.295  1.0
  O  O12  1  0.763  0.564  0.301  1.0
  O  O13  1  0.723  0.412  0.863  1.0
  O  O14  1  0.290  0.597  0.109  1.0
  O  O15  1  0.212  0.018  0.777  1.0
  O  O16  1  0.746  0.995  0.241  1.0
  O  O17  1  0.137  0.352  0.524  1.0
  O  O18  1  0.778  0.698  0.530  1.0
[/CIF]
.