#\#CIF_2.0
# Created by the Bilbao Crystallographic Server
# http://www.cryst.ehu.es
# Date: 17/04/2020 


data_5yOhtAoR
_audit_creation_date            2020-04-17
_audit_creation_method          "Bilbao Crystallographic Server"

_citation_journal_abbrev        "J. Phys.: Condens. Matter"
_citation_journal_volume        9
_citation_page_first            6651
_citation_page_last             6663
_citation_article_id            ?
_citation_year                  1997
_citation_DOI                   10.1088/0953-8984/9/31/017

loop_
_citation_author_name
"A. Szytula"
"M. Kolenda"
"E. Ressouche"
"W. Sikora"

_atomic_positions_source_database_code_ICSD  84169
_atomic_positions_source_other               .

_transition_temperature  13
_experiment_temperature  2

loop_
_irrep_id
_irrep_dimension
_irrep_small_dimension
_irrep_direction_type
_irrep_action
_irrep_modes_number
_irrep_presence
mX2+  1  1  .  primary  1  .

_exptl_crystal_magnetic_properties_details
;
NPD
Position structure from a measurement at 25K
Between 13K and 19.5K a sinusoidal incommensurate phase is reported.
;

_active_magnetic_irreps_details
;
1k magnetic structure
k-maximal magnetic symmetry (8 possible)
1-dim irrep as primary
;

_parent_space_group.name_H-M_alt  'I b a m'
_parent_space_group.IT_number                       72
_parent_space_group.transform_Pp_abc  'a,b,c;0,0,0'

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

_parent_space_group.child_transform_Pp_abc  'a,b,c;0,0,0'
_space_group_magn.transform_BNS_Pp_abc  'a,b,c;0,0,0'



_space_group_magn.number_BNS  55.364
_space_group_magn.name_BNS  "P_I b a m"
_cell_length_a             9.54420
_cell_length_b             11.13640
_cell_length_c             5.62860
_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+1/2,-z,+1 
3 -x+1/2,y+1/2,-z,+1 
4 -x,-y,z,+1 
5 -x,-y,-z,+1 
6 -x+1/2,y+1/2,z,+1 
7 x+1/2,-y+1/2,z,+1 
8 x,y,-z,+1 

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

loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Tb1 Tb 0.26820 0.37290 0.00000
Ni1 Ni 0.11480 0.13900 0.00000
Ni2 Ni 0.50000 0.00000 0.25000
Si1 Si 0.34670 0.13080 0.00000
Si2 Si 0.00000 0.26080 0.25000
Si3 Si 0.00000 0.00000 0.25000

loop_
_atom_site_moment.label
_atom_site_moment.crystalaxis_x
_atom_site_moment.crystalaxis_y
_atom_site_moment.crystalaxis_z
_atom_site_moment.symmform
Tb1 0.00000 0.00000 7.87(4) 0,0,mz


