The structure described by SrY2(Si3O10) crystallizes in the triclinic P-1 space group. Sr(1) is bonded in a 8-coordinate geometry to one O(1), one O(3), one O(4), one O(6), one O(8), one O(9), and two equivalent O(5) atoms. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(6), two equivalent O(2), and two equivalent O(3) atoms. In the second Y site, Y(2) is bonded to one O(10), one O(2), one O(5), one O(6), one O(8), and one O(9) atom to form YO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and corners with three equivalent Si(3)O4 tetrahedra. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SiO4 tetrahedra that share  a cornercorner with one Y(2)O6 octahedra and  a cornercorner with one Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 65°. In the second Si site, Si(2) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form SiO4 tetrahedra that share corners with two equivalent Y(2)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 45-65°. In the third Si site, Si(3) is bonded to one O(10), one O(7), one O(8), and one O(9) atom to form SiO4 tetrahedra that share corners with three equivalent Y(2)O6 octahedra and  a cornercorner with one Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-54°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Sr(1), one Y(1), and one Si(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Y(2), two equivalent Y(1), and one Si(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Sr(1), two equivalent Y(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Sr(1), one Si(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Y(2), and one Si(2) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Sr(1), one Y(1), one Y(2), and one Si(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Si(2) and one Si(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Sr(1), one Y(2), and one Si(3) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Y(2), and one Si(3) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Y(1), one Y(2), and one Si(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrY2Si3O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.839
_cell_length_b   6.981
_cell_length_c   9.393
_cell_angle_alpha   72.493
_cell_angle_beta   86.204
_cell_angle_gamma   87.801
_symmetry_Int_Tables_number   1
_cell_volume   426.632
_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
  Sr  Sr0  1  0.599  0.907  0.818  1.0
  Sr  Sr1  1  0.401  0.093  0.182  1.0
  Y  Y2  1  0.859  0.247  0.491  1.0
  Y  Y3  1  0.141  0.753  0.509  1.0
  Y  Y4  1  0.841  0.737  0.190  1.0
  Y  Y5  1  0.159  0.263  0.810  1.0
  Si  Si6  1  0.327  0.273  0.458  1.0
  Si  Si7  1  0.673  0.727  0.542  1.0
  Si  Si8  1  0.334  0.641  0.169  1.0
  Si  Si9  1  0.666  0.359  0.831  1.0
  Si  Si10  1  0.877  0.255  0.126  1.0
  Si  Si11  1  0.123  0.745  0.874  1.0
  O  O12  1  0.534  0.211  0.533  1.0
  O  O13  1  0.466  0.789  0.467  1.0
  O  O14  1  0.822  0.603  0.454  1.0
  O  O15  1  0.178  0.397  0.546  1.0
  O  O16  1  0.818  0.900  0.564  1.0
  O  O17  1  0.182  0.100  0.436  1.0
  O  O18  1  0.619  0.586  0.720  1.0
  O  O19  1  0.381  0.414  0.280  1.0
  O  O20  1  0.530  0.776  0.120  1.0
  O  O21  1  0.470  0.224  0.880  1.0
  O  O22  1  0.831  0.242  0.749  1.0
  O  O23  1  0.169  0.758  0.251  1.0
  O  O24  1  0.261  0.615  0.013  1.0
  O  O25  1  0.739  0.385  0.987  1.0
  O  O26  1  0.912  0.791  0.949  1.0
  O  O27  1  0.088  0.209  0.051  1.0
  O  O28  1  0.768  0.045  0.213  1.0
  O  O29  1  0.232  0.955  0.787  1.0
  O  O30  1  0.882  0.393  0.240  1.0
  O  O31  1  0.118  0.607  0.760  1.0
[/CIF]
.
The structure described by SrY2(Si3O10) crystallizes in the triclinic P-1 space group. Sr(1) is bonded in a 8-coordinate geometry to one O(1), one O(3), one O(4), one O(6), one O(8), one O(9), and two equivalent O(5) atoms. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(6), two equivalent O(2), and two equivalent O(3) atoms. In the second Y site, Y(2) is bonded to one O(10), one O(2), one O(5), one O(6), one O(8), and one O(9) atom to form YO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and corners with three equivalent Si(3)O4 tetrahedra. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SiO4 tetrahedra that share  a cornercorner with one Y(2)O6 octahedra and  a cornercorner with one Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 65°. In the second Si site, Si(2) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form SiO4 tetrahedra that share corners with two equivalent Y(2)O6 octahedra,  a cornercorner with one Si(1)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 45-65°. In the third Si site, Si(3) is bonded to one O(10), one O(7), one O(8), and one O(9) atom to form SiO4 tetrahedra that share corners with three equivalent Y(2)O6 octahedra and  a cornercorner with one Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-54°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Sr(1), one Y(1), and one Si(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Y(2), two equivalent Y(1), and one Si(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Sr(1), two equivalent Y(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Sr(1), one Si(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Y(2), and one Si(2) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Sr(1), one Y(1), one Y(2), and one Si(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Si(2) and one Si(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Sr(1), one Y(2), and one Si(3) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Y(2), and one Si(3) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Y(1), one Y(2), and one Si(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrY2Si3O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.839
_cell_length_b   6.981
_cell_length_c   9.393
_cell_angle_alpha   72.493
_cell_angle_beta   86.204
_cell_angle_gamma   87.801
_symmetry_Int_Tables_number   1
_cell_volume   426.632
_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
  Sr  Sr0  1  0.599  0.907  0.818  1.0
  Sr  Sr1  1  0.401  0.093  0.182  1.0
  Y  Y2  1  0.859  0.247  0.491  1.0
  Y  Y3  1  0.141  0.753  0.509  1.0
  Y  Y4  1  0.841  0.737  0.190  1.0
  Y  Y5  1  0.159  0.263  0.810  1.0
  Si  Si6  1  0.327  0.273  0.458  1.0
  Si  Si7  1  0.673  0.727  0.542  1.0
  Si  Si8  1  0.334  0.641  0.169  1.0
  Si  Si9  1  0.666  0.359  0.831  1.0
  Si  Si10  1  0.877  0.255  0.126  1.0
  Si  Si11  1  0.123  0.745  0.874  1.0
  O  O12  1  0.534  0.211  0.533  1.0
  O  O13  1  0.466  0.789  0.467  1.0
  O  O14  1  0.822  0.603  0.454  1.0
  O  O15  1  0.178  0.397  0.546  1.0
  O  O16  1  0.818  0.900  0.564  1.0
  O  O17  1  0.182  0.100  0.436  1.0
  O  O18  1  0.619  0.586  0.720  1.0
  O  O19  1  0.381  0.414  0.280  1.0
  O  O20  1  0.530  0.776  0.120  1.0
  O  O21  1  0.470  0.224  0.880  1.0
  O  O22  1  0.831  0.242  0.749  1.0
  O  O23  1  0.169  0.758  0.251  1.0
  O  O24  1  0.261  0.615  0.013  1.0
  O  O25  1  0.739  0.385  0.987  1.0
  O  O26  1  0.912  0.791  0.949  1.0
  O  O27  1  0.088  0.209  0.051  1.0
  O  O28  1  0.768  0.045  0.213  1.0
  O  O29  1  0.232  0.955  0.787  1.0
  O  O30  1  0.882  0.393  0.240  1.0
  O  O31  1  0.118  0.607  0.760  1.0
[/CIF]
.