#\#CIF_2.0
# Created by the Bilbao Crystallographic Server
# http://www.cryst.ehu.es
# Date: 27/09/2019 0


data_5yOhtAoR
_audit_creation_date            2019-09-27
_audit_creation_method          "Bilbao Crystallographic Server"

_citation_journal_abbrev        "PHYSICAL REVIEW 8"
_citation_journal_volume        29
_citation_page_first            2664
_citation_page_last             2672
_citation_article_id            ?
_citation_year                  1984
_citation_DOI                   10.1103/PhysRevB.29.2664

loop_
_citation_author_name
"B. H. Grier"
"J. M. Lawrence"
"V. Murgai"
"R. D. Parks"

_atomic_positions_source_database_code_ICSD  .
_atomic_positions_source_other               .

_transition_temperature  27
_experiment_temperature  10

loop_
_irrep_id
_irrep_dimension
_irrep_small_dimension
_irrep_direction_type
_irrep_action
_irrep_modes_number
_irrep_presence
mX2+  2  1  .  primary  1  .
mP4  2  1  .  primary  1  .

_exptl_crystal_magnetic_properties_details
;
NPD
Above 27K and below 39K a 1k magnetic phase with k=(1/2,1/2,0) is reported (see entry #1.290)
Some equally valid alternative models are mentioned in the reference.
Many other spin arrangements combining the two observed propagation vectors are possible. It seems that not all were checked.
;

_active_magnetic_irreps_details
;
2k magnetic structure
2 primary irreps with different not related wave vectors
;

_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'

loop_
_parent_propagation_vector.id
_parent_propagation_vector.kxkykz
k1 [1/2 1/2 0]
k2 [1/2 1/2 1/2]

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



_space_group_magn.number_BNS  54.350
_space_group_magn.name_BNS  "P_B c c a"
_cell_length_a             8.1656
_cell_length_b             8.1656
_cell_length_c             20.3410
_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 -y+3/4,-x+1/4,-z+1/4,+1 
3 -x+1/2,-y+1/2,z,+1 
4 y+1/4,x+3/4,-z+1/4,+1 
5 -x+1/4,-y+1/4,-z+1/4,+1 
6 y+1/2,x,z,+1 
7 x+1/4,y+1/4,-z+1/4,+1 
8 -y+1/2,-x,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 
3 x+1/2,y,z,-1 
4 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
Ce1_1 Ce 0.00000 0.00000 0.00000
Ce1_2 Ce  0.00000 0.00000 0.50000
Rh1_1 Rh 0.00000 0.25000 0.12500
Rh1_2 Rh  0.25000 0.00000 0.37500
Rh1_3 Rh  0.00000 0.25000 0.62500
Si1_1 Si 0.00000 0.00000 0.18685
Si1_2 Si  0.00000 0.00000 0.81315
Si1_3 Si  0.00000 0.00000 0.68685
Si1_4 Si  0.00000 0.00000 0.31315

loop_
_atom_site_moment.label
_atom_site_moment.crystalaxis_x
_atom_site_moment.crystalaxis_y
_atom_site_moment.crystalaxis_z
_atom_site_moment.symmform
Ce1_1 0.00000 0.00000 2.39(26) 0,0,mz
Ce1_2 0.00000 0.00000 0.16(26)  0,0,mz

