data_Er
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.43
_cell_length_b   3.43
_cell_length_c   3.43
_cell_angle_alpha   109.47
_cell_angle_beta   109.47
_cell_angle_gamma   109.47
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Er
_chemical_formula_sum   Er1
_cell_volume   30.96
_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
  Er  Er0  1  0.0  0.0  0.0  1.0

data_Er
_symmetry_space_group_name_H-M   Im-3m
_cell_length_a   3.96
_cell_length_b   3.96
_cell_length_c   3.96
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   229
_chemical_formula_structural   Er
_chemical_formula_sum   Er2
_cell_volume   61.91
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-x, -y, -z'
  3  '-y, x, z'
  4  'y, -x, -z'
  5  '-x, -y, z'
  6  'x, y, -z'
  7  'y, -x, z'
  8  '-y, x, -z'
  9  'x, -y, -z'
  10  '-x, y, z'
  11  '-y, -x, -z'
  12  'y, x, z'
  13  '-x, y, -z'
  14  'x, -y, z'
  15  'y, x, -z'
  16  '-y, -x, z'
  17  'z, x, y'
  18  '-z, -x, -y'
  19  'z, -y, x'
  20  '-z, y, -x'
  21  'z, -x, -y'
  22  '-z, x, y'
  23  'z, y, -x'
  24  '-z, -y, x'
  25  '-z, x, -y'
  26  'z, -x, y'
  27  '-z, -y, -x'
  28  'z, y, x'
  29  '-z, -x, y'
  30  'z, x, -y'
  31  '-z, y, x'
  32  'z, -y, -x'
  33  'y, z, x'
  34  '-y, -z, -x'
  35  'x, z, -y'
  36  '-x, -z, y'
  37  '-y, z, -x'
  38  'y, -z, x'
  39  '-x, z, y'
  40  'x, -z, -y'
  41  '-y, -z, x'
  42  'y, z, -x'
  43  '-x, -z, -y'
  44  'x, z, y'
  45  'y, -z, -x'
  46  '-y, z, x'
  47  'x, -z, y'
  48  '-x, z, -y'
  49  'x+1/2, y+1/2, z+1/2'
  50  '-x+1/2, -y+1/2, -z+1/2'
  51  '-y+1/2, x+1/2, z+1/2'
  52  'y+1/2, -x+1/2, -z+1/2'
  53  '-x+1/2, -y+1/2, z+1/2'
  54  'x+1/2, y+1/2, -z+1/2'
  55  'y+1/2, -x+1/2, z+1/2'
  56  '-y+1/2, x+1/2, -z+1/2'
  57  'x+1/2, -y+1/2, -z+1/2'
  58  '-x+1/2, y+1/2, z+1/2'
  59  '-y+1/2, -x+1/2, -z+1/2'
  60  'y+1/2, x+1/2, z+1/2'
  61  '-x+1/2, y+1/2, -z+1/2'
  62  'x+1/2, -y+1/2, z+1/2'
  63  'y+1/2, x+1/2, -z+1/2'
  64  '-y+1/2, -x+1/2, z+1/2'
  65  'z+1/2, x+1/2, y+1/2'
  66  '-z+1/2, -x+1/2, -y+1/2'
  67  'z+1/2, -y+1/2, x+1/2'
  68  '-z+1/2, y+1/2, -x+1/2'
  69  'z+1/2, -x+1/2, -y+1/2'
  70  '-z+1/2, x+1/2, y+1/2'
  71  'z+1/2, y+1/2, -x+1/2'
  72  '-z+1/2, -y+1/2, x+1/2'
  73  '-z+1/2, x+1/2, -y+1/2'
  74  'z+1/2, -x+1/2, y+1/2'
  75  '-z+1/2, -y+1/2, -x+1/2'
  76  'z+1/2, y+1/2, x+1/2'
  77  '-z+1/2, -x+1/2, y+1/2'
  78  'z+1/2, x+1/2, -y+1/2'
  79  '-z+1/2, y+1/2, x+1/2'
  80  'z+1/2, -y+1/2, -x+1/2'
  81  'y+1/2, z+1/2, x+1/2'
  82  '-y+1/2, -z+1/2, -x+1/2'
  83  'x+1/2, z+1/2, -y+1/2'
  84  '-x+1/2, -z+1/2, y+1/2'
  85  '-y+1/2, z+1/2, -x+1/2'
  86  'y+1/2, -z+1/2, x+1/2'
  87  '-x+1/2, z+1/2, y+1/2'
  88  'x+1/2, -z+1/2, -y+1/2'
  89  '-y+1/2, -z+1/2, x+1/2'
  90  'y+1/2, z+1/2, -x+1/2'
  91  '-x+1/2, -z+1/2, -y+1/2'
  92  'x+1/2, z+1/2, y+1/2'
  93  'y+1/2, -z+1/2, -x+1/2'
  94  '-y+1/2, z+1/2, x+1/2'
  95  'x+1/2, -z+1/2, y+1/2'
  96  '-x+1/2, z+1/2, -y+1/2'
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
  Er  Er0  2  0.0  0.0  0.0  1.0

Er
Er 0 0 + + + 0 0 + + o 0 0 o + o 0 0 + o + 0 0 o + + 0 0 + o o 0 0 o o + 
Er is Tungsten structured and crystallizes in the cubic Im-3m space group. Er(1) is bonded in a distorted body-centered cubic geometry to eight equivalent Er(1) atoms. All Er(1)-Er(1) bond lengths are 3.43 Å.