#\#CIF_2.0
# Created by the Bilbao Crystallographic Server
# http://www.cryst.ehu.es
# Date: 10/19/2022

data_5yOhtAoR
_audit_creation_date            2022-10-19
_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                    "La0.3 Y0.7 Mn2 Ge2"
_chemical_formula_weight                 ?
_chemical_melting_point                  ?
_chemical_compound_source                ?
_chemical_absolute_configuration         ?

_citation_journal_abbrev        "Journal of Alloys and Compounds"
_citation_journal_volume        223
_citation_page_first            101
_citation_page_last             110
_citation_article_id            .
_citation_year                  1995
_citation_DOI                   10.1016/0925-8388(94)01496-5

loop_
_citation_author_name
"G. Venturini"
"R. Welter"
"E. Ressouche"
"B. Malaman"

_temperature_position_structure         .
_temperature_atom_positions             .
_temperature_non-magn_atom_positions    .
_temperature_cell_parameters            .

_atomic_positions_source_database_code_ICSD  106980
_atomic_positions_source_other               .

_transition_temperature     350
_experiment_temperature     200

loop_
_irrep_id
_irrep_dimension
_irrep_small_dimension
_irrep_direction_type
_irrep_action
_irrep_modes_number
_irrep_presence
mGM3+ 1 1 . primary 1 .
mGM5- 2 2 special primary 1 .

_exptl_crystal_magnetic_properties_details
;
NPD
The reported magnetic ordering breaks the centrosymmetry of the structure. 
The structure is polar along b and FM along c
Another phase with incommensurate propagation vector is reported below 150K. The information about this second phase is incomplete.
;

_active_magnetic_irreps_details
;
1k  magnetic structure
Two irreps as primary ones. This means that two order parameters in the sense of Landau theory are present.
;

_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 [0 0 0]

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

_space_group_magn.number_BNS  44.231
_space_group_magn.name_BNS  "I m' m 2'"
_space_group_magn.point_group_name  "m'm2'"
_space_group_magn.point_group_number  "7.3.22"
_cell_length_a                 4.0604(8)
_cell_length_b                 4.0604(8)
_cell_length_c                 10.884(3)
_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,-z,+1 
3 -x,y,-z,-1 
4 -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
_atom_site_occupancy
Mn1 Mn 0.00000 0.50000 0.25000 1.
La1 La 0.00000 0.00000 0.00000 0.3
Y1 Y 0.00000 0.00000 0.00000 0.7
Ge1 Ge 0.00000 0.00000 0.385(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
_atom_site_moment.magnitude
_atom_site_moment.spherical_azimuthal
_atom_site_moment.spherical_polar
Mn1 0.0 -1.75(9) 1.52(14) 0,my,mz 2.31(12) ? ?

