data_2100265
_journal_name_full  'Acta Crystallographica, Section B'
_journal_year  2005
_journal_volume  61
_publ_section_title
;
Structures of the ordered double perovskites Sr2YNbO6 and Sr2YTaO6
;
loop_
_publ_author_name
  'Howard, Christopher J.'
  'Barnes, Paris W.'
  'Kennedy, Brendan J.'
  'Woodward, Patrick M.'
_chemical_formula_sum  "Nb O6 Sr2 Y"
_chemical_formula_weight  453.05
_symmetry_cell_setting  monoclinic
_symmetry_space_group_name_H-M  'P 21/n'
loop_
_symmetry_equiv_pos_site_id
_symmetry_equiv_pos_as_xyz
  1 +x,+y,+z
  2 -x+1/2,+y+1/2,-z+1/2
  -1 -x,-y,-z
  -2 +x+1/2,-y+1/2,+z+1/2
_cell_length_a  5.81174(5)
_cell_length_b  5.86444(5)
_cell_length_c  8.24541(7)
_cell_angle_alpha  90.0
_cell_angle_beta  90.1660(10)
_cell_angle_gamma  90.0
_cell_volume  280.940(13)
_cell_formula_units_Z  2
_diffrn_ambient_temperature  293
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_thermal_displace_type
_atom_site_occupancy
_atom_site_type_symbol
  SR -0.0067(3)  0.46802(16) 0.2512(3)  0.0166(3) Uiso 1.0 Sr
  NB 0.0 0.0 0.5 0.0121(6) Uiso 1.0 Nb
  Y 0.0 0.0 0.0 0.0108(5) Uiso 1.0 Y
  O1 0.0765(3)  0.0206(2)  0.2646(3)  0.0165(4) Uiso 1.0 O
  O2 0.2263(3)  0.3032(3)  -0.0384(2)  0.0151(6) Uiso 1.0 O
  O3 0.3048(3)  0.7743(3)  -0.0429(2)  0.0173(6) Uiso 1.0 O
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_site_symmetry_1
_geom_bond_site_symmetry_2
_geom_bond_distance
_geom_bond_publ_flag
  SR SR . 2_445 4.073(3)  N
  SR SR . 2_455 4.073(3)  N
  SR SR . 2_545 4.183(3)  N
  SR SR . 2_555 4.183(3)  N
  SR SR . -1_565 4.160(5) N
  SR SR . -1_566 4.120(5) N
  SR NB . 1_555 3.4262(18) N
  SR NB . 1_565 3.7333(16) N
  SR NB . 2_455 3.537(2)  N
  SR NB . 2_555 3.6099(18) N
  SR Y . 1_555 3.4381(17) N
  SR Y . 1_565 3.7442(17) N
  SR Y . 2_455 3.5352(18) N
  SR Y . 2_555 3.589(2)  N
  SR O1 . 1_555 2.913(3)  N
  SR O1 . -1_565 2.548(3)  N
  SR O1 . -2_455 2.822(3)  N
  SR O2 . 2_545 2.904(3)  N
  SR O2 . -1_565 2.820(3)  N
  SR O2 . -2_465 2.525(3)  N
  SR O3 . 1_555 2.6698(15) N
  SR O3 . 1_565 3.2772(15) N
  SR O3 . 2_455 3.328(2)  N
  SR O3 . 2_555 2.523(2)  N
  NB SR . 1_545 3.7333(16) N
  NB SR . 1_555 3.4262(18) N
  NB SR . 2_445 3.537(2)  N
  NB SR . 2_545 3.6099(18) N
  NB SR . -1_556 3.4262(18) N
  NB SR . -1_566 3.7333(16) N
  NB SR . -2_455 3.6099(18) N
  NB SR . -2_555 3.537(2)  N
  NB O1 . 2_545 1.9897(16) N
  NB O1 . -2_455 1.9897(16) N
  NB O2 . 2_545 1.9991(17) N
  NB O2 . -2_455 1.9991(17) N
  NB O3 . 1_555 1.996(2)  N
  NB O3 . -1_556 1.996(2)  N
  Y SR . 1_545 3.7442(17) N
  Y SR . 1_555 3.4381(17) N
  Y SR . 2_445 3.5352(18) N
  Y SR . 2_545 3.589(2)  N
  Y SR . -1_555 3.4381(17) N
  Y SR . -1_565 3.7442(17) N
  Y SR . -2_454 3.589(2)  N
  Y SR . -2_554 3.5352(18) N
  Y O1 . 1_555 2.2343(16) N
  Y O1 . -1_555 2.2343(16) N
  Y O2 . 1_545 2.2402(16) N
  Y O2 . -1_565 2.2402(16) N
  Y O3 . 1_555 2.229(2)  N
  Y O3 . -1_555 2.229(2)  N
  O1 SR . 1_555 2.913(3)  N
  O1 SR . -1_565 2.548(3)  N
  O1 SR . -2_554 2.822(3)  N
  O1 NB . 2_555 1.9897(16) N
  O1 Y . 1_555 2.2343(16) N
  O2 SR . 2_555 2.904(3)  N
  O2 SR . -1_565 2.820(3)  N
  O2 SR . -2_564 2.525(3)  N
  O2 NB . 2_555 1.9991(17) N
  O2 Y . 1_565 2.2402(16) N
  O3 SR . 1_545 3.2772(15) N
  O3 SR . 1_555 2.6698(15) N
  O3 SR . 2_445 3.328(2)  N
  O3 SR . 2_545 2.523(2)  N
  O3 NB . 1_555 1.996(2)  N
  O3 Y . 1_555 2.229(2)  N