data_global
_chemical_name_mineral 'Forsterite'
loop_
_publ_author_name
'Bocchio R'
'Brajkovic A'
'Pilati T'
_journal_name_full 'Neues Jahrbuch fur Mineralogie, Monatshefte'
_journal_volume 7 
_journal_year 1986
_journal_page_first 313
_journal_page_last 324
_publ_section_title
;
 Crystal chemistry of the olivines in the peridotites from the Ivrea-
 Verbano Zone (Western Italian Alps)
 Note: Sample OLBC3
;
_database_code_amcsd 0020396
_chemical_compound_source 'Valsesia, Ivrea-Verbano Zone, Western Italian Alps'
_chemical_formula_sum '(Mg1.7 Fe.3) Si O4'
_cell_length_a 4.766
_cell_length_b 10.250
_cell_length_c 6.005
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 293.353
_exptl_crystal_density_diffrn      3.400
_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
_atom_site_occupancy
Mg1   0.00000   0.00000   0.00000   0.84000
Fe1   0.00000   0.00000   0.00000   0.16000
Mg2  -0.01090   0.27789   0.25000   0.86000
Fe2  -0.01090   0.27789   0.25000   0.14000
Si   0.42730   0.09460   0.25000   1.00000
O1   0.76560   0.09170   0.25000   1.00000
O2   0.28060  -0.05190   0.25000   1.00000
O3   0.27910   0.16340   0.03350   1.00000
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Mg1 0.00280 0.00860 0.00710 0.00000 -0.00010 -0.00110
Fe1 0.00280 0.00860 0.00710 0.00000 -0.00010 -0.00110
Mg2 0.00370 0.00460 0.00570 0.00020 0.00000 0.00000
Fe2 0.00370 0.00460 0.00570 -0.00020 0.00000 0.00000
Si 0.00120 0.00570 0.00600 0.00000 0.00000 0.00000
O1 0.00250 0.00890 0.00640 0.00100 0.00000 0.00000
O2 0.00310 0.00550 0.00900 0.00080 0.00000 0.00000
O3 0.00360 0.00770 0.00770 0.00020 -0.00060 0.00170