data_global
_amcsd_formula_title 'H4 Mg2 Ni'
loop_
_publ_author_name
'Soubeyroux J'
'Fruchart D'
'Mikou A'
'Pezat M'
'Darriet B'
_journal_name_full 'Materials Research Bulletin'
_journal_volume 19 
_journal_year 1984
_journal_page_first 1119
_journal_page_last 1128
_publ_section_title
;
 Etude structurale du systeme Mg2Ni-H2 III- la variete monoclinique
 de Mg2 Ni H4
 _cod_database_code 1008269
;
_database_code_amcsd 0016191
_chemical_formula_sum 'Ni Mg2 H4'
_cell_length_a 13.197
_cell_length_b 6.403
_cell_length_c 6.489
_cell_angle_alpha 90
_cell_angle_beta 93.23
_cell_angle_gamma 90
_cell_volume 547.452
_exptl_crystal_density_diffrn      2.702
_symmetry_space_group_name_H-M 'I 1 a 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  '1/2+x,-y,z'
  '+x,1/2-y,1/2+z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Ni1   0.25120   0.46740   0.07890   1.00000
Ni2   0.00000   0.00000   0.00000   1.00000
Mg1   0.13400   0.25510   0.33640   1.00000
Mg2   0.15860   0.78040   0.36340   1.00000
Mg3   0.35270   0.23320   0.29590   1.00000
Mg4   0.37860   0.73190   0.43430   1.00000
H1   0.11970   0.28030   0.09850   0.66670
H2   0.08040   0.73270   0.03200   0.66670
H3   0.44790   0.30630   0.13370   0.66670
H4   0.41300   0.73040   0.14330   0.66670
H5   0.00510   0.69940   0.24660   0.66670
H6  -0.00600   0.27610   0.31510   0.66670
H7   0.27330   0.25430   0.42090   0.66670
H8   0.29360   0.78750   0.40220   0.66670
H9   0.13190  -0.02840   0.26590   0.66670
H10   0.15380   0.55120   0.43790   0.66670
H11   0.38130   0.01800   0.22970   0.66670
H12   0.38640   0.44300   0.48790   0.66670