data_global
_chemical_name_mineral 'Lizardite'
loop_
_publ_author_name
'Mellini M'
_journal_name_full 'American Mineralogist'
_journal_volume 67 
_journal_year 1982
_journal_page_first 587
_journal_page_last 598
_publ_section_title
;
 The crystal structure of lizardite 1T: hydrogen bonds and polytypism
;
_database_code_amcsd 0000867
_chemical_formula_sum 'Si2 Mg3 O9 H4'
_cell_length_a 5.332
_cell_length_b 5.332
_cell_length_c 7.233
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 178.086
_exptl_crystal_density_diffrn      2.584
_symmetry_space_group_name_H-M 'P 3 1 m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x-y,-y,z'
  '-y,x-y,z'
  'y,x,z'
  '-x+y,-x,z'
  '-x,-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
Si   0.33333   0.66667   0.07660 ?
Mg   0.33270   0.00000   0.45960 ?
O1   0.33333   0.66667   0.30000 ?
O2   0.50870   0.00000  -0.00360 ?
O-h3   0.66540   0.00000   0.59350 ?
O-h4   0.00000   0.00000   0.30880 ?
H3   0.65500   0.00000   0.70900   0.02600
H4   0.00000   0.00000   0.19900   0.00100
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
Si 0.00500 0.00500 0.01160 0.00000 0.00000 0.00250
Mg 0.00320 0.00320 0.01220 0.00000 0.00070 0.00160
O1 0.00960 0.00960 0.00680 0.00000 0.00000 0.00480
O2 0.01300 0.01300 0.01360 0.00000 0.00480 0.00650
O-h3 0.00950 0.00950 0.00910 0.00000 -0.00030 0.00480
O-h4 0.00580 0.00580 0.01610 0.00000 0.00000 0.00290