data_1008544
_chemical_name_systematic          'Praseodymium manganese silicide (1/2/2)'
_chemical_formula_structural       'Pr Mn2 Si2'
_chemical_formula_sum              'Mn2 Pr Si2'
_publ_section_title
;
Magnetic structures of PrMn~2~Si~2~ and NdMn~2~Si~2~ from neutron
diffraction studies
;
loop_
_publ_author_name
  'Welter, R'
  'Venturini, G'
  'Fruchart, D'
  'Malaman, B'
_journal_name_full                 'Journal of Alloys Compd.'
_journal_coden_ASTM                JALCEU
_journal_volume                    191
_journal_year                      1993
_journal_page_first                263
_journal_page_last                 270
_cell_length_a                     4.020(3)
_cell_length_b                     4.020(3)
_cell_length_c                     10.548(7)
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  90
_cell_volume                       170.5
_cell_formula_units_Z              2
_symmetry_space_group_name_H-M     'I 4/m m m'
_symmetry_Int_Tables_number        139
_symmetry_cell_setting             tetragonal
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '-x,-y,z'
  '-x,y,z'
  'x,-y,z'
  '-y,x,z'
  'y,-x,z'
  'y,x,z'
  '-y,-x,z'
  '-x,-y,-z'
  'x,y,-z'
  'x,-y,-z'
  '-x,y,-z'
  'y,-x,-z'
  '-y,x,-z'
  '-y,-x,-z'
  'y,x,-z'
  '1/2+x,1/2+y,1/2+z'
  '1/2-x,1/2-y,1/2+z'
  '1/2-x,1/2+y,1/2+z'
  '1/2+x,1/2-y,1/2+z'
  '1/2-y,1/2+x,1/2+z'
  '1/2+y,1/2-x,1/2+z'
  '1/2+y,1/2+x,1/2+z'
  '1/2-y,1/2-x,1/2+z'
  '1/2-x,1/2-y,1/2-z'
  '1/2+x,1/2+y,1/2-z'
  '1/2+x,1/2-y,1/2-z'
  '1/2-x,1/2+y,1/2-z'
  '1/2+y,1/2-x,1/2-z'
  '1/2-y,1/2+x,1/2-z'
  '1/2-y,1/2-x,1/2-z'
  '1/2+y,1/2+x,1/2-z'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  Pr0    0.000
  Mn0    0.000
  Si0    0.000
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_symmetry_multiplicity
_atom_site_Wyckoff_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_attached_hydrogens
_atom_site_calc_flag
  Pr1   Pr0    2 a 0. 0. 0. 1.  0 d
  Mn1   Mn0    4 d 0. 0.5 0.25 1.  0 d
  Si1   Si0    4 e 0. 0. 0.3799(7) 1.  0 d
_refine_ls_R_factor_all            0.017