The material structure described by Zr3Er4O12 crystallizes in the triclinic P-1 space group. There are four inequivalent Er sites. In the first Er site, Er(1) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(8), and two equivalent O(4) atoms. In the second Er site, Er(2) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(12), one O(4), one O(6), one O(8), and one O(9) atom. In the third Er site, Er(3) is bonded to one O(10), one O(11), one O(12), one O(3), one O(6), one O(7), and one O(9) atom to form distorted ErO7 pentagonal bipyramids that share  a cornercorner with one Zr(2)O6 octahedra and  an edgeedge with one Zr(2)O6 octahedra. The corner-sharing octahedral tilt angles are 52°. In the fourth Er site, Er(4) is bonded in a 7-coordinate geometry to one O(12), one O(7), one O(9), two equivalent O(11), and two equivalent O(5) atoms. There are three inequivalent Zr sites. In the first Zr site, Zr(1) is bonded in a 7-coordinate geometry to one O(1), one O(11), one O(12), one O(3), one O(5), and two equivalent O(7) atoms. In the second Zr site, Zr(2) is bonded to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(9) atom to form ZrO6 octahedra that share  a cornercorner with one Er(3)O7 pentagonal bipyramid and  an edgeedge with one Er(3)O7 pentagonal bipyramid. In the third Zr site, Zr(3) is bonded in a 6-coordinate geometry to one O(10), one O(2), one O(4), one O(6), and two equivalent O(8) atoms. There are twelve inequivalent O sites. In the first O site, O(1) is bonded to one Er(1), one Er(2), one Zr(1), and one Zr(2) atom to form distorted OEr2Zr2 tetrahedra that share  a cornercorner with one O(11)Er3Zr tetrahedra,  a cornercorner with one O(4)Er3Zr tetrahedra, corners with two equivalent O(7)Er2Zr2 tetrahedra, corners with two equivalent O(8)Er2Zr2 tetrahedra, corners with two equivalent O(10)Er3Zr tetrahedra, corners with two equivalent O(9)Er3Zr tetrahedra,  an edgeedge with one O(5)Er2Zr2 tetrahedra,  an edgeedge with one O(6)Er2Zr2 tetrahedra,  an edgeedge with one O(12)Er3Zr tetrahedra, and  an edgeedge with one O(4)Er3Zr tetrahedra. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Er(1), one Zr(2), and one Zr(3) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Er(1), one Er(3), one Zr(1), and one Zr(2) atom. In the fourth O site, O(4) is bonded to one Er(2), two equivalent Er(1), and one Zr(3) atom to form distorted OEr3Zr tetrahedra that share  a cornercorner with one O(1)Er2Zr2 tetrahedra,  a cornercorner with one O(12)Er3Zr tetrahedra,  a cornercorner with one O(9)Er3Zr tetrahedra, corners with two equivalent O(6)Er2Zr2 tetrahedra, corners with two equivalent O(10)Er3Zr tetrahedra, corners with three equivalent O(8)Er2Zr2 tetrahedra,  an edgeedge with one O(1)Er2Zr2 tetrahedra,  an edgeedge with one O(8)Er2Zr2 tetrahedra,  an edgeedge with one O(10)Er3Zr tetrahedra, and  an edgeedge with one O(4)Er3Zr tetrahedra. In the fifth O site, O(5) is bonded to two equivalent Er(4), one Zr(1), and one Zr(2) atom to form distorted OEr2Zr2 tetrahedra that share  a cornercorner with one O(6)Er2Zr2 tetrahedra,  a cornercorner with one O(9)Er3Zr tetrahedra, corners with two equivalent O(7)Er2Zr2 tetrahedra, corners with three equivalent O(11)Er3Zr tetrahedra, corners with three equivalent O(12)Er3Zr tetrahedra,  an edgeedge with one O(1)Er2Zr2 tetrahedra,  an edgeedge with one O(5)Er2Zr2 tetrahedra,  an edgeedge with one O(7)Er2Zr2 tetrahedra,  an edgeedge with one O(11)Er3Zr tetrahedra, and  an edgeedge with one O(9)Er3Zr tetrahedra. In the sixth O site, O(6) is bonded to one Er(2), one Er(3), one Zr(2), and one Zr(3) atom to form distorted OEr2Zr2 tetrahedra that share  a cornercorner with one O(5)Er2Zr2 tetrahedra,  a cornercorner with one O(7)Er2Zr2 tetrahedra,  a cornercorner with one O(8)Er2Zr2 tetrahedra,  a cornercorner with one O(10)Er3Zr tetrahedra,  a cornercorner with one O(11)Er3Zr tetrahedra,  a cornercorner with one O(9)Er3Zr tetrahedra, corners with two equivalent O(12)Er3Zr tetrahedra, corners with two equivalent O(4)Er3Zr tetrahedra,  an edgeedge with one O(1)Er2Zr2 tetrahedra,  an edgeedge with one O(8)Er2Zr2 tetrahedra,  an edgeedge with one O(10)Er3Zr tetrahedra, and  an edgeedge with one O(9)Er3Zr tetrahedra. In the seventh O site, O(7) is bonded to one Er(3), one Er(4), and two equivalent Zr(1) atoms to form OEr2Zr2 tetrahedra that share  a cornercorner with one O(6)Er2Zr2 tetrahedra,  a cornercorner with one O(10)Er3Zr tetrahedra, corners with two equivalent O(1)Er2Zr2 tetrahedra, corners with two equivalent O(5)Er2Zr2 tetrahedra, corners with two equivalent O(12)Er3Zr tetrahedra, corners with two equivalent O(9)Er3Zr tetrahedra, corners with three equivalent O(11)Er3Zr tetrahedra,  an edgeedge with one O(5)Er2Zr2 tetrahedra,  an edgeedge with one O(7)Er2Zr2 tetrahedra,  an edgeedge with one O(11)Er3Zr tetrahedra, and  an edgeedge with one O(12)Er3Zr tetrahedra. In the eighth O site, O(8) is bonded to one Er(1), one Er(2), and two equivalent Zr(3) atoms to form OEr2Zr2 tetrahedra that share  a cornercorner with one O(6)Er2Zr2 tetrahedra,  a cornercorner with one O(12)Er3Zr tetrahedra,  a cornercorner with one O(9)Er3Zr tetrahedra, corners with two equivalent O(1)Er2Zr2 tetrahedra, corners with two equivalent O(10)Er3Zr tetrahedra, corners with three equivalent O(4)Er3Zr tetrahedra,  an edgeedge with one O(6)Er2Zr2 tetrahedra,  an edgeedge with one O(8)Er2Zr2 tetrahedra,  an edgeedge with one O(10)Er3Zr tetrahedra, and  an edgeedge with one O(4)Er3Zr tetrahedra. In the ninth O site, O(9) is bonded to one Er(2), one Er(3), one Er(4), and one Zr(2) atom to form distorted OEr3Zr tetrahedra that share  a cornercorner with one O(5)Er2Zr2 tetrahedra,  a cornercorner with one O(6)Er2Zr2 tetrahedra,  a cornercorner with one O(8)Er2Zr2 tetrahedra,  a cornercorner with one O(11)Er3Zr tetrahedra,  a cornercorner with one O(12)Er3Zr tetrahedra,  a cornercorner with one O(4)Er3Zr tetrahedra, corners with two equivalent O(1)Er2Zr2 tetrahedra, corners with two equivalent O(7)Er2Zr2 tetrahedra, corners with two equivalent O(10)Er3Zr tetrahedra,  an edgeedge with one O(5)Er2Zr2 tetrahedra,  an edgeedge with one O(6)Er2Zr2 tetrahedra,  an edgeedge with one O(11)Er3Zr tetrahedra, and  an edgeedge with one O(12)Er3Zr tetrahedra. In the tenth O site, O(10) is bonded to one Er(1), one Er(2), one Er(3), and one Zr(3) atom to form OEr3Zr tetrahedra that share  a cornercorner with one O(6)Er2Zr2 tetrahedra,  a cornercorner with one O(7)Er2Zr2 tetrahedra,  a cornercorner with one O(11)Er3Zr tetrahedra, corners with two equivalent O(1)Er2Zr2 tetrahedra, corners with two equivalent O(8)Er2Zr2 tetrahedra, corners with two equivalent O(4)Er3Zr tetrahedra, corners with two equivalent O(9)Er3Zr tetrahedra,  an edgeedge with one O(6)Er2Zr2 tetrahedra,  an edgeedge with one O(8)Er2Zr2 tetrahedra,  an edgeedge with one O(12)Er3Zr tetrahedra, and  an edgeedge with one O(4)Er3Zr tetrahedra. In the eleventh O site, O(11) is bonded to one Er(3), two equivalent Er(4), and one Zr(1) atom to form OEr3Zr tetrahedra that share  a cornercorner with one O(1)Er2Zr2 tetrahedra,  a cornercorner with one O(6)Er2Zr2 tetrahedra,  a cornercorner with one O(10)Er3Zr tetrahedra,  a cornercorner with one O(9)Er3Zr tetrahedra, corners with two equivalent O(12)Er3Zr tetrahedra, corners with three equivalent O(5)Er2Zr2 tetrahedra, corners with three equivalent O(7)Er2Zr2 tetrahedra,  an edgeedge with one O(5)Er2Zr2 tetrahedra,  an edgeedge with one O(7)Er2Zr2 tetrahedra,  an edgeedge with one O(11)Er3Zr tetrahedra,  an edgeedge with one O(12)Er3Zr tetrahedra, and  an edgeedge with one O(9)Er3Zr tetrahedra. In the twelfth O site, O(12) is bonded to one Er(2), one Er(3), one Er(4), and one Zr(1) atom to form distorted OEr3Zr tetrahedra that share  a cornercorner with one O(8)Er2Zr2 tetrahedra,  a cornercorner with one O(4)Er3Zr tetrahedra,  a cornercorner with one O(9)Er3Zr tetrahedra, corners with two equivalent O(6)Er2Zr2 tetrahedra, corners with two equivalent O(7)Er2Zr2 tetrahedra, corners with two equivalent O(11)Er3Zr tetrahedra, corners with three equivalent O(5)Er2Zr2 tetrahedra,  an edgeedge with one O(1)Er2Zr2 tetrahedra,  an edgeedge with one O(7)Er2Zr2 tetrahedra,  an edgeedge with one O(10)Er3Zr tetrahedra,  an edgeedge with one O(11)Er3Zr tetrahedra, and  an edgeedge with one O(9)Er3Zr tetrahedra. is represented by the CIF card [CIF]
data_Er4Zr3O12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.317
_cell_length_b   6.382
_cell_length_c   12.675
_cell_angle_alpha   99.313
_cell_angle_beta   99.293
_cell_angle_gamma   99.396
_symmetry_Int_Tables_number   1
_cell_volume   488.184
_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
  Er  Er0  1  0.389  0.865  0.098  1.0
  Er  Er1  1  0.310  0.610  0.818  1.0
  Er  Er2  1  0.298  0.610  0.319  1.0
  Er  Er3  1  0.858  0.692  0.447  1.0
  Er  Er4  1  0.690  0.390  0.182  1.0
  Er  Er5  1  0.142  0.308  0.553  1.0
  Er  Er6  1  0.611  0.135  0.902  1.0
  Er  Er7  1  0.702  0.390  0.681  1.0
  Zr  Zr8  1  0.392  0.857  0.594  1.0
  Zr  Zr9  1  0.008  0.006  0.752  1.0
  Zr  Zr10  1  0.854  0.676  0.947  1.0
  Zr  Zr11  1  0.146  0.324  0.053  1.0
  Zr  Zr12  1  0.992  0.994  0.248  1.0
  Zr  Zr13  1  0.608  0.143  0.406  1.0
  O  O14  1  0.321  0.942  0.785  1.0
  O  O15  1  0.035  0.895  0.089  1.0
  O  O16  1  0.317  0.960  0.295  1.0
  O  O17  1  0.588  0.820  0.962  1.0
  O  O18  1  0.074  0.921  0.593  1.0
  O  O19  1  0.924  0.693  0.791  1.0
  O  O20  1  0.567  0.831  0.462  1.0
  O  O21  1  0.174  0.576  0.965  1.0
  O  O22  1  0.925  0.681  0.279  1.0
  O  O23  1  0.410  0.568  0.158  1.0
  O  O24  1  0.185  0.592  0.470  1.0
  O  O25  1  0.590  0.432  0.842  1.0
  O  O26  1  0.429  0.583  0.658  1.0
  O  O27  1  0.826  0.424  0.035  1.0
  O  O28  1  0.571  0.417  0.342  1.0
  O  O29  1  0.076  0.307  0.209  1.0
  O  O30  1  0.815  0.408  0.530  1.0
  O  O31  1  0.412  0.180  0.038  1.0
  O  O32  1  0.075  0.319  0.721  1.0
  O  O33  1  0.965  0.105  0.911  1.0
  O  O34  1  0.433  0.169  0.538  1.0
  O  O35  1  0.679  0.058  0.215  1.0
  O  O36  1  0.926  0.079  0.407  1.0
  O  O37  1  0.683  0.040  0.705  1.0
[/CIF]
.
The material structure described by Zr3Er4O12 crystallizes in the triclinic P-1 space group. There are four inequivalent Er sites. In the first Er site, Er(1) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(8), and two equivalent O(4) atoms. In the second Er site, Er(2) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(12), one O(4), one O(6), one O(8), and one O(9) atom. In the third Er site, Er(3) is bonded to one O(10), one O(11), one O(12), one O(3), one O(6), one O(7), and one O(9) atom to form distorted ErO7 pentagonal bipyramids that share  a cornercorner with one Zr(2)O6 octahedra and  an edgeedge with one Zr(2)O6 octahedra. The corner-sharing octahedral tilt angles are 52°. In the fourth Er site, Er(4) is bonded in a 7-coordinate geometry to one O(12), one O(7), one O(9), two equivalent O(11), and two equivalent O(5) atoms. There are three inequivalent Zr sites. In the first Zr site, Zr(1) is bonded in a 7-coordinate geometry to one O(1), one O(11), one O(12), one O(3), one O(5), and two equivalent O(7) atoms. In the second Zr site, Zr(2) is bonded to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(9) atom to form ZrO6 octahedra that share  a cornercorner with one Er(3)O7 pentagonal bipyramid and  an edgeedge with one Er(3)O7 pentagonal bipyramid. In the third Zr site, Zr(3) is bonded in a 6-coordinate geometry to one O(10), one O(2), one O(4), one O(6), and two equivalent O(8) atoms. There are twelve inequivalent O sites. In the first O site, O(1) is bonded to one Er(1), one Er(2), one Zr(1), and one Zr(2) atom to form distorted OEr2Zr2 tetrahedra that share  a cornercorner with one O(11)Er3Zr tetrahedra,  a cornercorner with one O(4)Er3Zr tetrahedra, corners with two equivalent O(7)Er2Zr2 tetrahedra, corners with two equivalent O(8)Er2Zr2 tetrahedra, corners with two equivalent O(10)Er3Zr tetrahedra, corners with two equivalent O(9)Er3Zr tetrahedra,  an edgeedge with one O(5)Er2Zr2 tetrahedra,  an edgeedge with one O(6)Er2Zr2 tetrahedra,  an edgeedge with one O(12)Er3Zr tetrahedra, and  an edgeedge with one O(4)Er3Zr tetrahedra. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Er(1), one Zr(2), and one Zr(3) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Er(1), one Er(3), one Zr(1), and one Zr(2) atom. In the fourth O site, O(4) is bonded to one Er(2), two equivalent Er(1), and one Zr(3) atom to form distorted OEr3Zr tetrahedra that share  a cornercorner with one O(1)Er2Zr2 tetrahedra,  a cornercorner with one O(12)Er3Zr tetrahedra,  a cornercorner with one O(9)Er3Zr tetrahedra, corners with two equivalent O(6)Er2Zr2 tetrahedra, corners with two equivalent O(10)Er3Zr tetrahedra, corners with three equivalent O(8)Er2Zr2 tetrahedra,  an edgeedge with one O(1)Er2Zr2 tetrahedra,  an edgeedge with one O(8)Er2Zr2 tetrahedra,  an edgeedge with one O(10)Er3Zr tetrahedra, and  an edgeedge with one O(4)Er3Zr tetrahedra. In the fifth O site, O(5) is bonded to two equivalent Er(4), one Zr(1), and one Zr(2) atom to form distorted OEr2Zr2 tetrahedra that share  a cornercorner with one O(6)Er2Zr2 tetrahedra,  a cornercorner with one O(9)Er3Zr tetrahedra, corners with two equivalent O(7)Er2Zr2 tetrahedra, corners with three equivalent O(11)Er3Zr tetrahedra, corners with three equivalent O(12)Er3Zr tetrahedra,  an edgeedge with one O(1)Er2Zr2 tetrahedra,  an edgeedge with one O(5)Er2Zr2 tetrahedra,  an edgeedge with one O(7)Er2Zr2 tetrahedra,  an edgeedge with one O(11)Er3Zr tetrahedra, and  an edgeedge with one O(9)Er3Zr tetrahedra. In the sixth O site, O(6) is bonded to one Er(2), one Er(3), one Zr(2), and one Zr(3) atom to form distorted OEr2Zr2 tetrahedra that share  a cornercorner with one O(5)Er2Zr2 tetrahedra,  a cornercorner with one O(7)Er2Zr2 tetrahedra,  a cornercorner with one O(8)Er2Zr2 tetrahedra,  a cornercorner with one O(10)Er3Zr tetrahedra,  a cornercorner with one O(11)Er3Zr tetrahedra,  a cornercorner with one O(9)Er3Zr tetrahedra, corners with two equivalent O(12)Er3Zr tetrahedra, corners with two equivalent O(4)Er3Zr tetrahedra,  an edgeedge with one O(1)Er2Zr2 tetrahedra,  an edgeedge with one O(8)Er2Zr2 tetrahedra,  an edgeedge with one O(10)Er3Zr tetrahedra, and  an edgeedge with one O(9)Er3Zr tetrahedra. In the seventh O site, O(7) is bonded to one Er(3), one Er(4), and two equivalent Zr(1) atoms to form OEr2Zr2 tetrahedra that share  a cornercorner with one O(6)Er2Zr2 tetrahedra,  a cornercorner with one O(10)Er3Zr tetrahedra, corners with two equivalent O(1)Er2Zr2 tetrahedra, corners with two equivalent O(5)Er2Zr2 tetrahedra, corners with two equivalent O(12)Er3Zr tetrahedra, corners with two equivalent O(9)Er3Zr tetrahedra, corners with three equivalent O(11)Er3Zr tetrahedra,  an edgeedge with one O(5)Er2Zr2 tetrahedra,  an edgeedge with one O(7)Er2Zr2 tetrahedra,  an edgeedge with one O(11)Er3Zr tetrahedra, and  an edgeedge with one O(12)Er3Zr tetrahedra. In the eighth O site, O(8) is bonded to one Er(1), one Er(2), and two equivalent Zr(3) atoms to form OEr2Zr2 tetrahedra that share  a cornercorner with one O(6)Er2Zr2 tetrahedra,  a cornercorner with one O(12)Er3Zr tetrahedra,  a cornercorner with one O(9)Er3Zr tetrahedra, corners with two equivalent O(1)Er2Zr2 tetrahedra, corners with two equivalent O(10)Er3Zr tetrahedra, corners with three equivalent O(4)Er3Zr tetrahedra,  an edgeedge with one O(6)Er2Zr2 tetrahedra,  an edgeedge with one O(8)Er2Zr2 tetrahedra,  an edgeedge with one O(10)Er3Zr tetrahedra, and  an edgeedge with one O(4)Er3Zr tetrahedra. In the ninth O site, O(9) is bonded to one Er(2), one Er(3), one Er(4), and one Zr(2) atom to form distorted OEr3Zr tetrahedra that share  a cornercorner with one O(5)Er2Zr2 tetrahedra,  a cornercorner with one O(6)Er2Zr2 tetrahedra,  a cornercorner with one O(8)Er2Zr2 tetrahedra,  a cornercorner with one O(11)Er3Zr tetrahedra,  a cornercorner with one O(12)Er3Zr tetrahedra,  a cornercorner with one O(4)Er3Zr tetrahedra, corners with two equivalent O(1)Er2Zr2 tetrahedra, corners with two equivalent O(7)Er2Zr2 tetrahedra, corners with two equivalent O(10)Er3Zr tetrahedra,  an edgeedge with one O(5)Er2Zr2 tetrahedra,  an edgeedge with one O(6)Er2Zr2 tetrahedra,  an edgeedge with one O(11)Er3Zr tetrahedra, and  an edgeedge with one O(12)Er3Zr tetrahedra. In the tenth O site, O(10) is bonded to one Er(1), one Er(2), one Er(3), and one Zr(3) atom to form OEr3Zr tetrahedra that share  a cornercorner with one O(6)Er2Zr2 tetrahedra,  a cornercorner with one O(7)Er2Zr2 tetrahedra,  a cornercorner with one O(11)Er3Zr tetrahedra, corners with two equivalent O(1)Er2Zr2 tetrahedra, corners with two equivalent O(8)Er2Zr2 tetrahedra, corners with two equivalent O(4)Er3Zr tetrahedra, corners with two equivalent O(9)Er3Zr tetrahedra,  an edgeedge with one O(6)Er2Zr2 tetrahedra,  an edgeedge with one O(8)Er2Zr2 tetrahedra,  an edgeedge with one O(12)Er3Zr tetrahedra, and  an edgeedge with one O(4)Er3Zr tetrahedra. In the eleventh O site, O(11) is bonded to one Er(3), two equivalent Er(4), and one Zr(1) atom to form OEr3Zr tetrahedra that share  a cornercorner with one O(1)Er2Zr2 tetrahedra,  a cornercorner with one O(6)Er2Zr2 tetrahedra,  a cornercorner with one O(10)Er3Zr tetrahedra,  a cornercorner with one O(9)Er3Zr tetrahedra, corners with two equivalent O(12)Er3Zr tetrahedra, corners with three equivalent O(5)Er2Zr2 tetrahedra, corners with three equivalent O(7)Er2Zr2 tetrahedra,  an edgeedge with one O(5)Er2Zr2 tetrahedra,  an edgeedge with one O(7)Er2Zr2 tetrahedra,  an edgeedge with one O(11)Er3Zr tetrahedra,  an edgeedge with one O(12)Er3Zr tetrahedra, and  an edgeedge with one O(9)Er3Zr tetrahedra. In the twelfth O site, O(12) is bonded to one Er(2), one Er(3), one Er(4), and one Zr(1) atom to form distorted OEr3Zr tetrahedra that share  a cornercorner with one O(8)Er2Zr2 tetrahedra,  a cornercorner with one O(4)Er3Zr tetrahedra,  a cornercorner with one O(9)Er3Zr tetrahedra, corners with two equivalent O(6)Er2Zr2 tetrahedra, corners with two equivalent O(7)Er2Zr2 tetrahedra, corners with two equivalent O(11)Er3Zr tetrahedra, corners with three equivalent O(5)Er2Zr2 tetrahedra,  an edgeedge with one O(1)Er2Zr2 tetrahedra,  an edgeedge with one O(7)Er2Zr2 tetrahedra,  an edgeedge with one O(10)Er3Zr tetrahedra,  an edgeedge with one O(11)Er3Zr tetrahedra, and  an edgeedge with one O(9)Er3Zr tetrahedra. is represented by the CIF card [CIF]
data_Er4Zr3O12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.317
_cell_length_b   6.382
_cell_length_c   12.675
_cell_angle_alpha   99.313
_cell_angle_beta   99.293
_cell_angle_gamma   99.396
_symmetry_Int_Tables_number   1
_cell_volume   488.184
_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
  Er  Er0  1  0.389  0.865  0.098  1.0
  Er  Er1  1  0.310  0.610  0.818  1.0
  Er  Er2  1  0.298  0.610  0.319  1.0
  Er  Er3  1  0.858  0.692  0.447  1.0
  Er  Er4  1  0.690  0.390  0.182  1.0
  Er  Er5  1  0.142  0.308  0.553  1.0
  Er  Er6  1  0.611  0.135  0.902  1.0
  Er  Er7  1  0.702  0.390  0.681  1.0
  Zr  Zr8  1  0.392  0.857  0.594  1.0
  Zr  Zr9  1  0.008  0.006  0.752  1.0
  Zr  Zr10  1  0.854  0.676  0.947  1.0
  Zr  Zr11  1  0.146  0.324  0.053  1.0
  Zr  Zr12  1  0.992  0.994  0.248  1.0
  Zr  Zr13  1  0.608  0.143  0.406  1.0
  O  O14  1  0.321  0.942  0.785  1.0
  O  O15  1  0.035  0.895  0.089  1.0
  O  O16  1  0.317  0.960  0.295  1.0
  O  O17  1  0.588  0.820  0.962  1.0
  O  O18  1  0.074  0.921  0.593  1.0
  O  O19  1  0.924  0.693  0.791  1.0
  O  O20  1  0.567  0.831  0.462  1.0
  O  O21  1  0.174  0.576  0.965  1.0
  O  O22  1  0.925  0.681  0.279  1.0
  O  O23  1  0.410  0.568  0.158  1.0
  O  O24  1  0.185  0.592  0.470  1.0
  O  O25  1  0.590  0.432  0.842  1.0
  O  O26  1  0.429  0.583  0.658  1.0
  O  O27  1  0.826  0.424  0.035  1.0
  O  O28  1  0.571  0.417  0.342  1.0
  O  O29  1  0.076  0.307  0.209  1.0
  O  O30  1  0.815  0.408  0.530  1.0
  O  O31  1  0.412  0.180  0.038  1.0
  O  O32  1  0.075  0.319  0.721  1.0
  O  O33  1  0.965  0.105  0.911  1.0
  O  O34  1  0.433  0.169  0.538  1.0
  O  O35  1  0.679  0.058  0.215  1.0
  O  O36  1  0.926  0.079  0.407  1.0
  O  O37  1  0.683  0.040  0.705  1.0
[/CIF]
.