The material described by EuYAl6(BO3)8 is Calcite-derived structured and crystallizes in the monoclinic C2 space group. Eu(1) is bonded in a 6-coordinate geometry to two equivalent O(10), two equivalent O(11), and two equivalent O(7) atoms. Y(1) is bonded in a 6-coordinate geometry to two equivalent O(12), two equivalent O(8), and two equivalent O(9) atoms. There are four inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(11), one O(2), one O(3), one O(5), one O(6), and one O(8) atom to form edge-sharing AlO6 octahedra. In the second Al site, Al(2) is bonded to one O(1), one O(12), one O(3), one O(4), one O(6), and one O(7) atom to form edge-sharing AlO6 octahedra. In the third Al site, Al(3) is bonded to two equivalent O(10), two equivalent O(2), and two equivalent O(5) atoms to form edge-sharing AlO6 octahedra. In the fourth Al site, Al(4) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(9) atoms to form edge-sharing AlO6 octahedra. There are four inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(10), one O(2), and one O(7) atom. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(1), one O(8), and one O(9) atom. In the third B site, B(3) is bonded in a trigonal planar geometry to one O(11), one O(12), and one O(3) atom. In the fourth B site, B(4) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(6) atom. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Al(2), one Al(4), and one B(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Al(1), one Al(3), and one B(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Al(1), one Al(2), and one B(3) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Al(2), one Al(4), and one B(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Al(1), one Al(3), and one B(4) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Al(1), one Al(2), and one B(4) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Eu(1), one Al(2), and one B(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Y(1), one Al(1), and one B(2) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Y(1), one Al(4), and one B(2) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Eu(1), one Al(3), and one B(1) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Eu(1), one Al(1), and one B(3) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Y(1), one Al(2), and one B(3) atom. is represented by the CIF file [CIF]
data_EuYAl6(BO3)8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.934
_cell_length_b   5.934
_cell_length_c   11.178
_cell_angle_alpha   81.925
_cell_angle_beta   81.925
_cell_angle_gamma   104.153
_symmetry_Int_Tables_number   1
_cell_volume   371.547
_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
  Eu  Eu0  1  0.499  0.501  0.000  1.0
  Y  Y1  1  1.000  0.000  0.500  1.0
  Al  Al2  1  0.278  0.834  0.223  1.0
  Al  Al3  1  0.778  0.333  0.722  1.0
  Al  Al4  1  0.667  0.222  0.278  1.0
  Al  Al5  1  0.166  0.722  0.777  1.0
  Al  Al6  1  0.057  0.943  0.000  1.0
  Al  Al7  1  0.556  0.444  0.500  1.0
  B  B8  1  0.971  0.412  0.029  1.0
  B  B9  1  0.471  0.914  0.529  1.0
  B  B10  1  0.086  0.529  0.471  1.0
  B  B11  1  0.588  0.029  0.971  1.0
  B  B12  1  0.192  0.308  0.251  1.0
  B  B13  1  0.692  0.808  0.749  1.0
  B  B14  1  0.750  0.750  0.250  1.0
  B  B15  1  0.250  0.250  0.750  1.0
  O  O16  1  0.545  0.137  0.455  1.0
  O  O17  1  0.045  0.635  0.955  1.0
  O  O18  1  0.365  0.955  0.045  1.0
  O  O19  1  0.863  0.455  0.545  1.0
  O  O20  1  0.341  0.160  0.250  1.0
  O  O21  1  0.840  0.659  0.750  1.0
  O  O22  1  0.676  0.527  0.325  1.0
  O  O23  1  0.176  0.027  0.824  1.0
  O  O24  1  0.973  0.824  0.176  1.0
  O  O25  1  0.473  0.324  0.675  1.0
  O  O26  1  0.601  0.898  0.250  1.0
  O  O27  1  0.102  0.399  0.750  1.0
  O  O28  1  0.766  0.358  0.114  1.0
  O  O29  1  0.261  0.860  0.610  1.0
  O  O30  1  0.236  0.387  0.486  1.0
  O  O31  1  0.741  0.892  0.986  1.0
  O  O32  1  0.280  0.536  0.191  1.0
  O  O33  1  0.788  0.036  0.685  1.0
  O  O34  1  0.964  0.212  0.315  1.0
  O  O35  1  0.464  0.720  0.809  1.0
  O  O36  1  0.140  0.739  0.390  1.0
  O  O37  1  0.642  0.234  0.886  1.0
  O  O38  1  0.108  0.259  0.014  1.0
  O  O39  1  0.613  0.764  0.514  1.0
[/CIF]
.
The material described by EuYAl6(BO3)8 is Calcite-derived structured and crystallizes in the monoclinic C2 space group. Eu(1) is bonded in a 6-coordinate geometry to two equivalent O(10), two equivalent O(11), and two equivalent O(7) atoms. Y(1) is bonded in a 6-coordinate geometry to two equivalent O(12), two equivalent O(8), and two equivalent O(9) atoms. There are four inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(11), one O(2), one O(3), one O(5), one O(6), and one O(8) atom to form edge-sharing AlO6 octahedra. In the second Al site, Al(2) is bonded to one O(1), one O(12), one O(3), one O(4), one O(6), and one O(7) atom to form edge-sharing AlO6 octahedra. In the third Al site, Al(3) is bonded to two equivalent O(10), two equivalent O(2), and two equivalent O(5) atoms to form edge-sharing AlO6 octahedra. In the fourth Al site, Al(4) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(9) atoms to form edge-sharing AlO6 octahedra. There are four inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(10), one O(2), and one O(7) atom. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(1), one O(8), and one O(9) atom. In the third B site, B(3) is bonded in a trigonal planar geometry to one O(11), one O(12), and one O(3) atom. In the fourth B site, B(4) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(6) atom. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Al(2), one Al(4), and one B(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Al(1), one Al(3), and one B(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Al(1), one Al(2), and one B(3) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Al(2), one Al(4), and one B(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Al(1), one Al(3), and one B(4) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Al(1), one Al(2), and one B(4) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Eu(1), one Al(2), and one B(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Y(1), one Al(1), and one B(2) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Y(1), one Al(4), and one B(2) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Eu(1), one Al(3), and one B(1) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Eu(1), one Al(1), and one B(3) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Y(1), one Al(2), and one B(3) atom. is represented by the CIF file [CIF]
data_EuYAl6(BO3)8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.934
_cell_length_b   5.934
_cell_length_c   11.178
_cell_angle_alpha   81.925
_cell_angle_beta   81.925
_cell_angle_gamma   104.153
_symmetry_Int_Tables_number   1
_cell_volume   371.547
_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
  Eu  Eu0  1  0.499  0.501  0.000  1.0
  Y  Y1  1  1.000  0.000  0.500  1.0
  Al  Al2  1  0.278  0.834  0.223  1.0
  Al  Al3  1  0.778  0.333  0.722  1.0
  Al  Al4  1  0.667  0.222  0.278  1.0
  Al  Al5  1  0.166  0.722  0.777  1.0
  Al  Al6  1  0.057  0.943  0.000  1.0
  Al  Al7  1  0.556  0.444  0.500  1.0
  B  B8  1  0.971  0.412  0.029  1.0
  B  B9  1  0.471  0.914  0.529  1.0
  B  B10  1  0.086  0.529  0.471  1.0
  B  B11  1  0.588  0.029  0.971  1.0
  B  B12  1  0.192  0.308  0.251  1.0
  B  B13  1  0.692  0.808  0.749  1.0
  B  B14  1  0.750  0.750  0.250  1.0
  B  B15  1  0.250  0.250  0.750  1.0
  O  O16  1  0.545  0.137  0.455  1.0
  O  O17  1  0.045  0.635  0.955  1.0
  O  O18  1  0.365  0.955  0.045  1.0
  O  O19  1  0.863  0.455  0.545  1.0
  O  O20  1  0.341  0.160  0.250  1.0
  O  O21  1  0.840  0.659  0.750  1.0
  O  O22  1  0.676  0.527  0.325  1.0
  O  O23  1  0.176  0.027  0.824  1.0
  O  O24  1  0.973  0.824  0.176  1.0
  O  O25  1  0.473  0.324  0.675  1.0
  O  O26  1  0.601  0.898  0.250  1.0
  O  O27  1  0.102  0.399  0.750  1.0
  O  O28  1  0.766  0.358  0.114  1.0
  O  O29  1  0.261  0.860  0.610  1.0
  O  O30  1  0.236  0.387  0.486  1.0
  O  O31  1  0.741  0.892  0.986  1.0
  O  O32  1  0.280  0.536  0.191  1.0
  O  O33  1  0.788  0.036  0.685  1.0
  O  O34  1  0.964  0.212  0.315  1.0
  O  O35  1  0.464  0.720  0.809  1.0
  O  O36  1  0.140  0.739  0.390  1.0
  O  O37  1  0.642  0.234  0.886  1.0
  O  O38  1  0.108  0.259  0.014  1.0
  O  O39  1  0.613  0.764  0.514  1.0
[/CIF]
.