#\#CIF_2.0
# Created by the Bilbao Crystallographic Server
# http://www.cryst.ehu.es
# Date: 11/19/2017 17:15:35
# Database entry: 1.142 CeMgPb
# Cif-like file for the case 1.142


data_5yOhtAoR
_audit_creation_date            2017-11-19
_audit_creation_method          "Bilbao Crystallographic Server"

_chemical_name_systematic
;
;
_chemical_name_common                    ?
_chemical_formula_moiety                 ?
_chemical_formula_structural             ?
_chemical_formula_analytical             ?
_chemical_formula_iupac                  ?
_chemical_formula_sum                    'Ce Mg Pb'
_chemical_formula_weight                 ?
_chemical_melting_point                  ?
_chemical_compound_source                ?
_chemical_absolute_configuration         .


_citation_journal_abbrev        "Journal of Magnetism and Magnetic Materials"
_citation_journal_volume        324
_citation_page_first            2937
_citation_page_last             2952
_citation_article_id            .
_citation_year                  2012
_citation_DOI                   10.1016/j.jmmm.2012.03.037

loop_
_citation_author_name
"Lemoine, P."

_atomic_positions_source_database_code_ICSD  .
_atomic_positions_source_other               .

_transition_temperature     7
_experiment_temperature     2

loop_
_irrep_id
_irrep_dimension
_irrep_small_dimension
_irrep_direction_type
_irrep_action
_irrep_modes_number
_irrep_presence
mX4- 2 2 special primary 1 .

_exptl_crystal_magnetic_properties_details
;
NPD
modulus Ce magnetic moment: 1.38(5)
It coexists with am incommensurate sinusoidal phase with k=(0.448,0.5,0) with the same orientations of the magnetic moments (see entry #1.1.27)
;

_active_magnetic_irreps_details
;
1k magnetic structure
k-maximal magnetic symmetry (6 possible)
2-dim irrep active with special direction
;

_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]

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


_space_group_magn.number_BNS  67.510
_space_group_magn.name_BNS  "C_A  m  m  a"
_space_group_magn.point_group_name  "mmm1'"
_space_group_magn.point_group_number  "8.2.25"
_cell_length_a                 9.07600
_cell_length_b                 9.07600
_cell_length_c                 16.33900
_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,-y+1/2,z,+1
3 -y+1/4,-x+1/4,-z+1/2,+1
4 y+3/4,x+1/4,-z+1/2,+1
5 -x,-y+1/2,-z,+1
6 x,y,-z,+1
7 y+3/4,x+1/4,z+1/2,+1
8 -y+1/4,-x+1/4,z+1/2,+1

loop_
_space_group_symop_magn_centering.id
_space_group_symop_magn_centering.xyz
1 x,y,z,+1
2 x+1/4,y+3/4,z+1/2,+1
3 x+1/2,y+1/2,z,+1
4 x+3/4,y+1/4,z+1/2,+1
5 x,y+1/2,z,-1
6 x+1/4,y+1/4,z+1/2,-1
7 x+1/2,y,z,-1
8 x+3/4,y+3/4,z+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
Ce1 Ce 0.00000 0.00000 0.330(1) 1
Mg1 Mg 0.00000 0.25000 0.00000 1
Pb1 Pb 0.00000 0.00000 0.134(1) 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
Ce1 -0.98 0.98 0.0 mx,-mx,0

