The material described by LiSr2V2(Si2O7)2 crystallizes in the orthorhombic Amm2 space group. Li(1) is bonded in a distorted rectangular see-saw-like geometry to four equivalent O(4) atoms. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 1-coordinate geometry to one O(7) and four equivalent O(5) atoms. In the second Sr site, Sr(2) is bonded in a 10-coordinate geometry to two equivalent O(2), four equivalent O(4), and four equivalent O(5) atoms. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(7) and four equivalent O(4) atoms to form distorted VO5 trigonal bipyramids that share corners with four equivalent Si(1)O4 tetrahedra. In the second V site, V(2) is bonded in a 5-coordinate geometry to one O(6) and four equivalent O(5) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(3), and two equivalent O(4) atoms to form SiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, and corners with two equivalent V(1)O5 trigonal bipyramids. In the second Si site, Si(2) is bonded to one O(1), one O(3), and two equivalent O(5) atoms to form corner-sharing SiO4 tetrahedra. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to two equivalent Si(2) atoms. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to two equivalent Sr(2) and two equivalent Si(1) atoms. In the third O site, O(3) is bonded in a linear geometry to one Si(1) and one Si(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Li(1), one Sr(2), one V(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one V(2), and one Si(2) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one V(2) atom. In the seventh O site, O(7) is bonded in a linear geometry to one Sr(1) and one V(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2LiV2(Si2O7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.451
_cell_length_b   7.258
_cell_length_c   8.261
_cell_angle_alpha   90.000
_cell_angle_beta   109.262
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   308.538
_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
  Sr  Sr0  1  0.149  0.750  0.298  1.0
  Sr  Sr1  1  0.795  0.250  0.590  1.0
  Li  Li2  1  0.328  0.750  0.656  1.0
  V  V3  1  0.894  0.750  0.787  1.0
  V  V4  1  0.112  0.250  0.225  1.0
  Si  Si5  1  0.401  0.464  0.801  1.0
  Si  Si6  1  0.605  0.520  0.211  1.0
  Si  Si7  1  0.605  0.980  0.211  1.0
  Si  Si8  1  0.401  0.036  0.801  1.0
  O  O9  1  0.624  0.750  0.248  1.0
  O  O10  1  0.366  0.250  0.732  1.0
  O  O11  1  0.504  0.476  0.008  1.0
  O  O12  1  0.504  0.024  0.008  1.0
  O  O13  1  0.597  0.556  0.712  1.0
  O  O14  1  0.900  0.441  0.304  1.0
  O  O15  1  0.405  0.059  0.304  1.0
  O  O16  1  0.115  0.944  0.712  1.0
  O  O17  1  0.008  0.250  0.015  1.0
  O  O18  1  0.008  0.750  0.016  1.0
  O  O19  1  0.900  0.059  0.304  1.0
  O  O20  1  0.597  0.944  0.712  1.0
  O  O21  1  0.115  0.556  0.712  1.0
  O  O22  1  0.405  0.441  0.304  1.0
[/CIF]
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The material described by LiSr2V2(Si2O7)2 crystallizes in the orthorhombic Amm2 space group. Li(1) is bonded in a distorted rectangular see-saw-like geometry to four equivalent O(4) atoms. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 1-coordinate geometry to one O(7) and four equivalent O(5) atoms. In the second Sr site, Sr(2) is bonded in a 10-coordinate geometry to two equivalent O(2), four equivalent O(4), and four equivalent O(5) atoms. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(7) and four equivalent O(4) atoms to form distorted VO5 trigonal bipyramids that share corners with four equivalent Si(1)O4 tetrahedra. In the second V site, V(2) is bonded in a 5-coordinate geometry to one O(6) and four equivalent O(5) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(3), and two equivalent O(4) atoms to form SiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, and corners with two equivalent V(1)O5 trigonal bipyramids. In the second Si site, Si(2) is bonded to one O(1), one O(3), and two equivalent O(5) atoms to form corner-sharing SiO4 tetrahedra. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to two equivalent Si(2) atoms. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to two equivalent Sr(2) and two equivalent Si(1) atoms. In the third O site, O(3) is bonded in a linear geometry to one Si(1) and one Si(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Li(1), one Sr(2), one V(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one V(2), and one Si(2) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one V(2) atom. In the seventh O site, O(7) is bonded in a linear geometry to one Sr(1) and one V(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2LiV2(Si2O7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.451
_cell_length_b   7.258
_cell_length_c   8.261
_cell_angle_alpha   90.000
_cell_angle_beta   109.262
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   308.538
_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
  Sr  Sr0  1  0.149  0.750  0.298  1.0
  Sr  Sr1  1  0.795  0.250  0.590  1.0
  Li  Li2  1  0.328  0.750  0.656  1.0
  V  V3  1  0.894  0.750  0.787  1.0
  V  V4  1  0.112  0.250  0.225  1.0
  Si  Si5  1  0.401  0.464  0.801  1.0
  Si  Si6  1  0.605  0.520  0.211  1.0
  Si  Si7  1  0.605  0.980  0.211  1.0
  Si  Si8  1  0.401  0.036  0.801  1.0
  O  O9  1  0.624  0.750  0.248  1.0
  O  O10  1  0.366  0.250  0.732  1.0
  O  O11  1  0.504  0.476  0.008  1.0
  O  O12  1  0.504  0.024  0.008  1.0
  O  O13  1  0.597  0.556  0.712  1.0
  O  O14  1  0.900  0.441  0.304  1.0
  O  O15  1  0.405  0.059  0.304  1.0
  O  O16  1  0.115  0.944  0.712  1.0
  O  O17  1  0.008  0.250  0.015  1.0
  O  O18  1  0.008  0.750  0.016  1.0
  O  O19  1  0.900  0.059  0.304  1.0
  O  O20  1  0.597  0.944  0.712  1.0
  O  O21  1  0.115  0.556  0.712  1.0
  O  O22  1  0.405  0.441  0.304  1.0
[/CIF]
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