#\#CIF_2.0
# Created by the Bilbao Crystallographic Server
# http://www.cryst.ehu.es
# Date: 05/02/2021 

data_5yOhtAoR
_audit_creation_date            2021-05-02
_audit_creation_method          "Bilbao Crystallographic Server"

_citation_journal_abbrev        "Journal of Magnetism and Magnetic Materials"
_citation_journal_volume        73
_citation_page_first            233
_citation_page_last             239
_citation_article_id            .
_citation_year                  1988
_citation_DOI                   10.1016/0304-8853(88)90299-5

loop_
_citation_author_name
"J. M. Barandiaran"
"D. Gignoux"
"D. Schmitt"
"J. C. Gomez-Sal"
"J. Rodriguez Fernandez"
"P. Chieux"
"J. Schweizer"

_atomic_positions_source_database_code_ICSD  53619
_atomic_positions_source_other               .

_temperature_position_structure         20
_temperature_atom_positions             .              
_temperature_non-magn_atom_positions    .
_temperature_cell_parameters            .

_transition_temperature     14.5
_experiment_temperature     4.2

loop_
_irrep_id
_irrep_dimension
_irrep_small_dimension
_irrep_direction_type
_irrep_action
_irrep_modes_number
_irrep_presence
mB1 8 1 general primary 1  .

_exptl_crystal_magnetic_properties_details
;
NPD
Position structure from a determination at 20K
The reported propagation vector is (0.207,0,0.903), but it said that it appears as satellites of bcc forbidden reflections. This means that the actual propagation vector is (1.207,0,0.903) or equivalent.
;

_active_magnetic_irreps_details
;
1k incommensurate magnetic structure
k-maximal magnetic symmetry
2-dim small irrep along a general direction a primary
;

_parent_space_group.name_H-M_alt  "I 4/m m m"
_parent_space_group.IT_number             139
_parent_space_group.transform_Pp_abc  'a,b,c;0,0,0'

_cell_modulation_dimension               1

loop_
_cell_wave_vector_seq_id
_cell_wave_vector_x
_cell_wave_vector_y
_cell_wave_vector_z
1 1.20700 0.00000 0.903


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

_space_group.magn_ssg_name  "I2/m1'(a,0,g)00s"
_space_group.magn_point_group_name  "2/m1'"
_space_group.magn_point_group_number  5.2.13
_cell_length_a                 3.97300
_cell_length_b                 3.97300
_cell_length_c                 9.58300
_cell_angle_alpha              90.00000
_cell_angle_beta               90.00000
_cell_angle_gamma              90.00000

loop_
_space_group_symop_magn_ssg_operation.id
_space_group_symop_magn_ssg_operation.algebraic
1 x1,x2,x3,x4,+1
2 -x1,x2,-x3,-x4,+1
3 -x1,-x2,-x3,-x4,+1
4 x1,-x2,x3,x4,+1

loop_
_space_group_symop_magn_ssg_centering.id
_space_group_symop_magn_ssg_centering.algebraic
1 x1,x2,x3,x4,+1
2 x1,x2,x3,x4+1/2,-1
3 x1+1/2,x2+1/2,x3+1/2,x4,+1
4 x1+1/2,x2+1/2,x3+1/2,x4+1/2,-1

loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Gd1_1 Gd 0.00000 0.00000 0.00000 1
Ni1_1 Ni 0.50000 0.00000 0.75000 1
Si1_1 Si 0.00000 0.00000 0.36600 1


loop_
_atom_site_moment.label
_atom_site_moment.crystalaxis_x
_atom_site_moment.crystalaxis_y
_atom_site_moment.crystalaxis_z
_atom_site_moment.symmform
Gd1_1 0.00000 0.00000 0.00000 0,0,0

loop_
_atom_site_Fourier_wave_vector.seq_id
_atom_site_Fourier_wave_vector.q1_coeff
1 1

loop_
_atom_site_moment_Fourier.atom_site_label
_atom_site_moment_Fourier.axis
_atom_site_moment_Fourier.wave_vector_seq_id
_atom_site_moment_Fourier_param.cos
_atom_site_moment_Fourier_param.sin
_atom_site_moment_Fourier_param.cos_symmform
_atom_site_moment_Fourier_param.sin_symmform
Gd1_1 x 1 0.00000 0.00000 0 0
Gd1_1 y 1 8.9(4) 0.00000 Myc1 0
Gd1_1 z 1 0.00000 0.00000 0 0

