data_global
_chemical_name_mineral 'Monticellite'
loop_
_publ_author_name
'Brown G'
'West J'
_journal_name_full 'Zeitschrift fur Kristallographie'
_journal_volume 66 
_journal_year 1927
_journal_page_first 154
_journal_page_last 161
_publ_section_title
;
 The structure of monticellite (Mg Ca Si O4).
 _cod_database_code 1011202
;
_database_code_amcsd 0018072
_chemical_formula_sum 'Mg Ca Si O4'
_cell_length_a 4.815
_cell_length_b 11.08
_cell_length_c 6.37
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 339.841
_exptl_crystal_density_diffrn      3.058
_symmetry_space_group_name_H-M 'P b n m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,y,1/2-z'
  '-x,-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,z'
  '1/2+x,1/2-y,-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Mg1   0.00000   0.00000   0.00000
Ca1  -0.01700   0.25700   0.25000
Si1   0.40300   0.08600   0.25000
O1  -0.23600   0.06700   0.25000
O2   0.26400   0.46400   0.25000
O3   0.25000   0.15300   0.03000