#\#CIF_2.0
# Created by the Bilbao Crystallographic Server
# http://www.cryst.ehu.es
# Date: 28/02/2021 

data_5yOhtAoR
_audit_creation_date            2021-02-28
_audit_creation_method          "Bilbao Crystallographic Server"

_citation_journal_abbrev        "Physica B"
_citation_journal_volume        234-236
_citation_page_first            891
_citation_page_last             892
_citation_article_id            . 
_citation_year                  1997
_citation_DOI                   10.1016/S0921-4526(96)01179-9

loop_
_citation_author_name
"R. Feyerherm"
"B. Becker"
"M.F. Collins"
"J. Mydosh"
"G.J. Nieuwenhuys"
"S. Ramakrishnan"

_atomic_positions_source_database_code_ICSD  57482
_atomic_positions_source_other               .

_transition_temperature  26
_experiment_temperature  8.5

loop_
_irrep_id
_irrep_dimension
_irrep_small_dimension
_irrep_direction_type
_irrep_action
_irrep_modes_number
_irrep_presence
mY1-  1  1  .  primary  3  .

_exptl_crystal_magnetic_properties_details
;
NPD
Non standard parent space group I12/c1
Position structure only approximate, taken from a similar compound (with Ru/Rh mixed sites) in the ICSD, except lattice parameters, which are from a determination at 40K from the same reference.
;

_active_magnetic_irreps_details
;
1k magnetic structure
k-maximal magnetic symmetry
1-dim irrep as primary
The irrep labels used here are for the parent standard setting C2/c
The article reports a different model with a slightly worse fit as a possible alternative. This second model (named model A in the reference) involves however two irreps, i.e. two order parameters, and has a lower symmetry, despite its apparent similarity.
;

_parent_space_group.name_H-M_alt  'I 2/c'
_parent_space_group.IT_number                       15
_parent_space_group.transform_Pp_abc  'a+c,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-c,b,a;1/4,1/4,1/4'



_space_group_magn.number_BNS  13.74
_space_group_magn.name_BNS  "P_C 2/c"
_cell_length_a             9.80960
_cell_length_b             11.38570
_cell_length_c             5.84150
_cell_angle_alpha          90.00
_cell_angle_beta           90.04
_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,y,-z+1/2,+1 
3 -x+1/2,-y+1/2,-z+1/2,+1 
4 x+1/2,-y+1/2,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
Rh1 Rh 0.00000 0.00000 0.25000
Rh2 Rh 0.89690 0.64140 0.02150
U1 U 0.73280 0.86580 0.99690
Si1 Si 0.00000 0.78600 0.25000
Si2 Si 0.00000 0.48460 0.25000
Si3 Si 0.00000 0.22150 0.25000
Si4 Si 0.66130 0.60020 0.99810

loop_
_atom_site_moment.label
_atom_site_moment.crystalaxis_x
_atom_site_moment.crystalaxis_y
_atom_site_moment.crystalaxis_z
_atom_site_moment.symmform
_atom_site_moment.magnitude
U1 -0.89(4) 1.58(3) 0.00000 mx,my,mz  1.81(5)

