The compound described by (NH4)3CrO8 is Indium-derived structured and crystallizes in the orthorhombic Cmc2_1 space group. The structure is zero-dimensional and consists of four ammonium molecules and four CrH8(NO4)2 clusters. In each CrH8(NO4)2 cluster, Cr(1) is bonded in a distorted hexagonal bipyramidal geometry to one O(1), one O(3), one O(5), one O(6), two equivalent O(2), and two equivalent O(4) atoms. N(1) is bonded in a tetrahedral geometry to one H(1), one H(2), one H(3), and one H(4) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one N(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one N(1) atom. In the third H site, H(3) is bonded in a single-bond geometry to one N(1) and one O(4) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one N(1) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Cr(1) and one O(6) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Cr(1) and one O(4) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Cr(1) and one O(5) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Cr(1), one H(3), and one O(2) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Cr(1) and one O(3) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one Cr(1) and one O(1) atom. is represented by the CIF card [CIF]
data_CrH12N3O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.989
_cell_length_b   6.989
_cell_length_c   8.474
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   89.289
_symmetry_Int_Tables_number   1
_cell_volume   413.912
_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
  Cr  Cr0  1  0.749  0.251  0.823  1.0
  Cr  Cr1  1  0.251  0.749  0.323  1.0
  H  H2  1  0.631  0.788  0.500  1.0
  H  H3  1  0.212  0.369  0.500  1.0
  H  H4  1  0.369  0.212  0.000  1.0
  H  H5  1  0.788  0.631  0.000  1.0
  H  H6  1  0.747  0.876  0.658  1.0
  H  H7  1  0.124  0.253  0.658  1.0
  H  H8  1  0.253  0.124  0.158  1.0
  H  H9  1  0.876  0.747  0.158  1.0
  H  H10  1  0.873  0.739  0.528  1.0
  H  H11  1  0.261  0.127  0.528  1.0
  H  H12  1  0.127  0.261  0.028  1.0
  H  H13  1  0.739  0.873  0.028  1.0
  H  H14  1  0.703  0.635  0.641  1.0
  H  H15  1  0.365  0.297  0.641  1.0
  H  H16  1  0.297  0.365  0.141  1.0
  H  H17  1  0.635  0.703  0.141  1.0
  H  H18  1  0.180  0.820  0.893  1.0
  H  H19  1  0.820  0.180  0.393  1.0
  H  H20  1  0.235  0.595  0.840  1.0
  H  H21  1  0.405  0.765  0.840  1.0
  H  H22  1  0.765  0.405  0.340  1.0
  H  H23  1  0.595  0.235  0.340  1.0
  H  H24  1  0.233  0.767  0.703  1.0
  H  H25  1  0.767  0.233  0.203  1.0
  N  N26  1  0.738  0.760  0.582  1.0
  N  N27  1  0.240  0.262  0.582  1.0
  N  N28  1  0.262  0.240  0.082  1.0
  N  N29  1  0.760  0.738  0.082  1.0
  N  N30  1  0.263  0.737  0.819  1.0
  N  N31  1  0.737  0.263  0.319  1.0
  O  O32  1  0.550  0.450  0.861  1.0
  O  O33  1  0.450  0.550  0.361  1.0
  O  O34  1  0.948  0.451  0.836  1.0
  O  O35  1  0.549  0.052  0.836  1.0
  O  O36  1  0.052  0.549  0.336  1.0
  O  O37  1  0.451  0.948  0.336  1.0
  O  O38  1  0.943  0.057  0.768  1.0
  O  O39  1  0.057  0.943  0.268  1.0
  O  O40  1  0.909  0.355  0.984  1.0
  O  O41  1  0.645  0.091  0.984  1.0
  O  O42  1  0.091  0.645  0.484  1.0
  O  O43  1  0.355  0.909  0.484  1.0
  O  O44  1  0.852  0.148  0.633  1.0
  O  O45  1  0.148  0.852  0.133  1.0
  O  O46  1  0.587  0.413  0.695  1.0
  O  O47  1  0.413  0.587  0.195  1.0
[/CIF]
.
The compound described by (NH4)3CrO8 is Indium-derived structured and crystallizes in the orthorhombic Cmc2_1 space group. The structure is zero-dimensional and consists of four ammonium molecules and four CrH8(NO4)2 clusters. In each CrH8(NO4)2 cluster, Cr(1) is bonded in a distorted hexagonal bipyramidal geometry to one O(1), one O(3), one O(5), one O(6), two equivalent O(2), and two equivalent O(4) atoms. N(1) is bonded in a tetrahedral geometry to one H(1), one H(2), one H(3), and one H(4) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one N(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one N(1) atom. In the third H site, H(3) is bonded in a single-bond geometry to one N(1) and one O(4) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one N(1) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Cr(1) and one O(6) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Cr(1) and one O(4) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Cr(1) and one O(5) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Cr(1), one H(3), and one O(2) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Cr(1) and one O(3) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one Cr(1) and one O(1) atom. is represented by the CIF card [CIF]
data_CrH12N3O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.989
_cell_length_b   6.989
_cell_length_c   8.474
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   89.289
_symmetry_Int_Tables_number   1
_cell_volume   413.912
_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
  Cr  Cr0  1  0.749  0.251  0.823  1.0
  Cr  Cr1  1  0.251  0.749  0.323  1.0
  H  H2  1  0.631  0.788  0.500  1.0
  H  H3  1  0.212  0.369  0.500  1.0
  H  H4  1  0.369  0.212  0.000  1.0
  H  H5  1  0.788  0.631  0.000  1.0
  H  H6  1  0.747  0.876  0.658  1.0
  H  H7  1  0.124  0.253  0.658  1.0
  H  H8  1  0.253  0.124  0.158  1.0
  H  H9  1  0.876  0.747  0.158  1.0
  H  H10  1  0.873  0.739  0.528  1.0
  H  H11  1  0.261  0.127  0.528  1.0
  H  H12  1  0.127  0.261  0.028  1.0
  H  H13  1  0.739  0.873  0.028  1.0
  H  H14  1  0.703  0.635  0.641  1.0
  H  H15  1  0.365  0.297  0.641  1.0
  H  H16  1  0.297  0.365  0.141  1.0
  H  H17  1  0.635  0.703  0.141  1.0
  H  H18  1  0.180  0.820  0.893  1.0
  H  H19  1  0.820  0.180  0.393  1.0
  H  H20  1  0.235  0.595  0.840  1.0
  H  H21  1  0.405  0.765  0.840  1.0
  H  H22  1  0.765  0.405  0.340  1.0
  H  H23  1  0.595  0.235  0.340  1.0
  H  H24  1  0.233  0.767  0.703  1.0
  H  H25  1  0.767  0.233  0.203  1.0
  N  N26  1  0.738  0.760  0.582  1.0
  N  N27  1  0.240  0.262  0.582  1.0
  N  N28  1  0.262  0.240  0.082  1.0
  N  N29  1  0.760  0.738  0.082  1.0
  N  N30  1  0.263  0.737  0.819  1.0
  N  N31  1  0.737  0.263  0.319  1.0
  O  O32  1  0.550  0.450  0.861  1.0
  O  O33  1  0.450  0.550  0.361  1.0
  O  O34  1  0.948  0.451  0.836  1.0
  O  O35  1  0.549  0.052  0.836  1.0
  O  O36  1  0.052  0.549  0.336  1.0
  O  O37  1  0.451  0.948  0.336  1.0
  O  O38  1  0.943  0.057  0.768  1.0
  O  O39  1  0.057  0.943  0.268  1.0
  O  O40  1  0.909  0.355  0.984  1.0
  O  O41  1  0.645  0.091  0.984  1.0
  O  O42  1  0.091  0.645  0.484  1.0
  O  O43  1  0.355  0.909  0.484  1.0
  O  O44  1  0.852  0.148  0.633  1.0
  O  O45  1  0.148  0.852  0.133  1.0
  O  O46  1  0.587  0.413  0.695  1.0
  O  O47  1  0.413  0.587  0.195  1.0
[/CIF]
.