data_global
_chemical_name_mineral 'Forsterite'
loop_
_publ_author_name
'Takeuchi Y'
'Yamanaka T'
'Haga N'
'Hirano M'
_journal_name_full 'Materials Science of the Earth's Interior'
_journal_volume 1984 
_journal_year 1984
_journal_page_first 191
_journal_page_last 231
_publ_section_title
;
 High-temperature crystallography of olivines and spinels
 Note: T = 1600 C
;
_database_code_amcsd 0014401
_chemical_formula_sum 'Mg2 Si O4'
_cell_length_a 4.834
_cell_length_b 10.455
_cell_length_c 6.1147
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 309.034
_exptl_crystal_density_diffrn      3.024
_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_U_iso_or_equiv
Mg1   0.00000   0.00000   0.00000   0.04471
Mg2   0.99460   0.28140   0.25000   0.04293
Si   0.42740   0.09450   0.25000   0.02736
O1   0.76300   0.09100   0.25000   0.03800
O2   0.21900   0.45230   0.25000   0.03521
O3   0.28500   0.16310   0.03920   0.04015
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 0.04262 0.06424 0.02747 -0.00205 -0.00299 -0.00939
Mg2 0.05209 0.04209 0.03410 0.00282 0.00000 0.00000
Si 0.02131 0.03212 0.02898 -0.00026 0.00000 0.00000
O1 0.03433 0.05371 0.02462 0.00000 0.00000 0.00000
O2 0.03433 0.03489 0.03599 0.00000 0.00000 0.00000
O3 0.04025 0.05150 0.02841 0.00026 0.00000 0.01231