#\#CIF_2.0
# Created by the Bilbao Crystallographic Server
# http://www.cryst.ehu.es

data_5yOhtAoR
_audit_creation_date            2018-03-21
_audit_creation_method          "Bilbao Crystallographic Server"

_citation_journal_abbrev        "Journal of Magnetism and Magnetic Materials"
_citation_journal_volume        13
_citation_page_first            121
_citation_page_last             124
_citation_article_id            ?
_citation_year                  1979
_citation_DOI                   10.1016/0304-8853(79)90044-1

loop_
_citation_author_name
"W. Scharf"
"H. Weitzel"
"I. Yaeger"
"I. Maartense"
"B. Wanklyn"




_atomic_positions_source_database_code_ICSD  15854
_atomic_positions_source_other               .

_transition_temperature  1.97
_experiment_temperature  1.65

loop_
_irrep_id
_irrep_dimension
_irrep_small_dimension
_irrep_direction_type
_irrep_action
_irrep_modes_number
_irrep_presence
mY2  2  2  special  primary  4  .

_exptl_crystal_magnetic_properties_details
;
NSD
Spin modulus 3.05(3) and 59(2) degrees as canting angle with the x-axis
A more recent work (J. Magn. Magn. Mat. 151, 123 (1995)) corrects spin modulus and canting angle to 3.2 and 29.9, respectively.
Above 1.97K, up to 2.96K, an incommensurate phase exists
;

_active_magnetic_irreps_details
;
1k magnetic structure
k-maximal magnetic symmetry (4 possible)
2-dim irrep active along a special direction
Non-collinear structure. Zero spin y-component is dictated by symmetry
;

_parent_space_group.name_H-M_alt  'P  b  c  n'
_parent_space_group.IT_number                       60
_parent_space_group.transform_Pp_abc  'a,b,c;0,0,0'

loop_
_parent_propagation_vector.id
_parent_propagation_vector.kxkykz
k1 [0 1/2 0]

_parent_space_group.child_transform_Pp_abc  'a,2b,c;0,0,0'
_space_group_magn.transform_BNS_Pp_abc  'a,-c,b;1/4,1/8,1/4'


_space_group_magn.number_BNS  19.28
_space_group_magn.name_BNS  "P_c2_12_12_1"
_cell_length_a             14.14750
_cell_length_b             11.42400
_cell_length_c             5.04460
_cell_angle_alpha          90.00
_cell_angle_beta           90.00
_cell_angle_gamma          90.00

loop_
_space_group_symop_magn_operation.id
_space_group_symop_magn_operation.xyz
1 x,y,z,+1
2 x+1/2,-y+1/4,-z,+1
3 -x+1/2,-y+3/4,z+1/2,+1
4 -x,y+1/2,-z+1/2,+1

loop_
_space_group_symop_magn_centering.id
_space_group_symop_magn_centering.xyz
1 x,y,z,+1
2 x,y+1/2,z,-1

loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Co1_1 Co 0.00000 0.09090 0.25000
Co1_2 Co  0.00000 0.90910 0.75000
Nb1_1 Nb 0.16160 0.16210 0.74450
Nb1_2 Nb  0.83840 0.83790 0.25550
O1_1 O 0.09520 0.19830 0.43290
O1_2 O  0.90480 0.80170 0.56710
O2_1 O 0.07530 0.05765 0.88840
O2_2 O  0.92470 0.94235 0.11160
O3_1 O 0.25230 0.06190 0.56930
O3_2 O  0.74770 0.93810 0.43070

loop_
_atom_site_moment.label
_atom_site_moment.crystalaxis_x
_atom_site_moment.crystalaxis_y
_atom_site_moment.crystalaxis_z
_atom_site_moment.symmform
Co1_1 1.57 0.00000 2.61 mx,0,mz
Co1_2 1.57 0.00000 2.61 mx,0,mz


