The structure described by Rb4Mg3H10 crystallizes in the orthorhombic Cmce space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 10-coordinate geometry to one H(1), two equivalent H(3), three equivalent H(2), and four equivalent H(4) atoms. In the second Rb site, Rb(2) is bonded in a 7-coordinate geometry to one H(2), two equivalent H(1), and four equivalent H(4) atoms. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent H(2) and four equivalent H(4) atoms to form face-sharing MgH6 octahedra. In the second Mg site, Mg(2) is bonded to one H(1), one H(2), two equivalent H(3), and two equivalent H(4) atoms to form a mixture of corner and face-sharing MgH6 octahedra. The corner-sharing octahedral tilt angles are 9°. There are four inequivalent H sites. In the first H site, H(2) is bonded to one Rb(2), three equivalent Rb(1), one Mg(1), and one Mg(2) atom to form a mixture of distorted corner and edge-sharing HRb4Mg2 octahedra. The corner-sharing octahedral tilt angles range from 0-8°. In the second H site, H(3) is bonded in a distorted linear geometry to two equivalent Rb(1) and two equivalent Mg(2) atoms. In the third H site, H(4) is bonded in a 2-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), one Mg(1), and one Mg(2) atom. In the fourth H site, H(1) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(2), and one Mg(2) atom. is represented by the CIF card [CIF]
data_Rb4Mg3H10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.648
_cell_length_b   7.648
_cell_length_c   13.423
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   133.869
_symmetry_Int_Tables_number   1
_cell_volume   565.957
_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
  Rb  Rb0  1  0.041  0.959  0.639  1.0
  Rb  Rb1  1  0.959  0.041  0.361  1.0
  Rb  Rb2  1  0.459  0.541  0.139  1.0
  Rb  Rb3  1  0.541  0.459  0.861  1.0
  Rb  Rb4  1  0.243  0.757  0.895  1.0
  Rb  Rb5  1  0.757  0.243  0.105  1.0
  Rb  Rb6  1  0.257  0.743  0.395  1.0
  Rb  Rb7  1  0.743  0.257  0.605  1.0
  Mg  Mg8  1  0.500  0.500  0.500  1.0
  Mg  Mg9  1  0.000  0.000  0.000  1.0
  Mg  Mg10  1  0.377  0.623  0.656  1.0
  Mg  Mg11  1  0.623  0.377  0.344  1.0
  Mg  Mg12  1  0.123  0.877  0.156  1.0
  Mg  Mg13  1  0.877  0.123  0.844  1.0
  H  H14  1  0.243  0.757  0.648  1.0
  H  H15  1  0.757  0.243  0.352  1.0
  H  H16  1  0.257  0.743  0.148  1.0
  H  H17  1  0.743  0.257  0.852  1.0
  H  H18  1  0.027  0.973  0.856  1.0
  H  H19  1  0.973  0.027  0.144  1.0
  H  H20  1  0.473  0.527  0.356  1.0
  H  H21  1  0.527  0.473  0.644  1.0
  H  H22  1  0.138  0.362  0.750  1.0
  H  H23  1  0.362  0.138  0.250  1.0
  H  H24  1  0.862  0.638  0.250  1.0
  H  H25  1  0.638  0.862  0.750  1.0
  H  H26  1  0.385  0.187  0.461  1.0
  H  H27  1  0.187  0.385  0.539  1.0
  H  H28  1  0.687  0.885  0.961  1.0
  H  H29  1  0.885  0.687  0.039  1.0
  H  H30  1  0.813  0.615  0.461  1.0
  H  H31  1  0.615  0.813  0.539  1.0
  H  H32  1  0.313  0.115  0.039  1.0
  H  H33  1  0.115  0.313  0.961  1.0
[/CIF]
.
The structure described by Rb4Mg3H10 crystallizes in the orthorhombic Cmce space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 10-coordinate geometry to one H(1), two equivalent H(3), three equivalent H(2), and four equivalent H(4) atoms. In the second Rb site, Rb(2) is bonded in a 7-coordinate geometry to one H(2), two equivalent H(1), and four equivalent H(4) atoms. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent H(2) and four equivalent H(4) atoms to form face-sharing MgH6 octahedra. In the second Mg site, Mg(2) is bonded to one H(1), one H(2), two equivalent H(3), and two equivalent H(4) atoms to form a mixture of corner and face-sharing MgH6 octahedra. The corner-sharing octahedral tilt angles are 9°. There are four inequivalent H sites. In the first H site, H(2) is bonded to one Rb(2), three equivalent Rb(1), one Mg(1), and one Mg(2) atom to form a mixture of distorted corner and edge-sharing HRb4Mg2 octahedra. The corner-sharing octahedral tilt angles range from 0-8°. In the second H site, H(3) is bonded in a distorted linear geometry to two equivalent Rb(1) and two equivalent Mg(2) atoms. In the third H site, H(4) is bonded in a 2-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), one Mg(1), and one Mg(2) atom. In the fourth H site, H(1) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(2), and one Mg(2) atom. is represented by the CIF card [CIF]
data_Rb4Mg3H10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.648
_cell_length_b   7.648
_cell_length_c   13.423
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   133.869
_symmetry_Int_Tables_number   1
_cell_volume   565.957
_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
  Rb  Rb0  1  0.041  0.959  0.639  1.0
  Rb  Rb1  1  0.959  0.041  0.361  1.0
  Rb  Rb2  1  0.459  0.541  0.139  1.0
  Rb  Rb3  1  0.541  0.459  0.861  1.0
  Rb  Rb4  1  0.243  0.757  0.895  1.0
  Rb  Rb5  1  0.757  0.243  0.105  1.0
  Rb  Rb6  1  0.257  0.743  0.395  1.0
  Rb  Rb7  1  0.743  0.257  0.605  1.0
  Mg  Mg8  1  0.500  0.500  0.500  1.0
  Mg  Mg9  1  0.000  0.000  0.000  1.0
  Mg  Mg10  1  0.377  0.623  0.656  1.0
  Mg  Mg11  1  0.623  0.377  0.344  1.0
  Mg  Mg12  1  0.123  0.877  0.156  1.0
  Mg  Mg13  1  0.877  0.123  0.844  1.0
  H  H14  1  0.243  0.757  0.648  1.0
  H  H15  1  0.757  0.243  0.352  1.0
  H  H16  1  0.257  0.743  0.148  1.0
  H  H17  1  0.743  0.257  0.852  1.0
  H  H18  1  0.027  0.973  0.856  1.0
  H  H19  1  0.973  0.027  0.144  1.0
  H  H20  1  0.473  0.527  0.356  1.0
  H  H21  1  0.527  0.473  0.644  1.0
  H  H22  1  0.138  0.362  0.750  1.0
  H  H23  1  0.362  0.138  0.250  1.0
  H  H24  1  0.862  0.638  0.250  1.0
  H  H25  1  0.638  0.862  0.750  1.0
  H  H26  1  0.385  0.187  0.461  1.0
  H  H27  1  0.187  0.385  0.539  1.0
  H  H28  1  0.687  0.885  0.961  1.0
  H  H29  1  0.885  0.687  0.039  1.0
  H  H30  1  0.813  0.615  0.461  1.0
  H  H31  1  0.615  0.813  0.539  1.0
  H  H32  1  0.313  0.115  0.039  1.0
  H  H33  1  0.115  0.313  0.961  1.0
[/CIF]
.