data_global
_chemical_name_mineral 'Lizardite'
loop_
_publ_author_name
'Mellini M'
'Zanazzi P F'
_journal_name_full 'American Mineralogist'
_journal_volume 72 
_journal_year 1987
_journal_page_first 943
_journal_page_last 948
_publ_section_title
;
 Crystal structures of lizardite-1T and lizardite-2H1 from Coli, Italy
 Sample: Lizardite-2H1
 Note: U(1,2) for Si/O2/O3 altered to match symmetry constraints
;
_database_code_amcsd 0001113
_chemical_formula_sum 'Si2 Mg3 O9 H4'
_cell_length_a 5.318
_cell_length_b 5.318
_cell_length_c 14.541
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 356.141
_exptl_crystal_density_diffrn      2.584
_symmetry_space_group_name_H-M 'P 63 c m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x,-x+y,z'
  'x-y,x,1/2+z'
  '-y,-x,1/2+z'
  '-y,x-y,z'
  'x-y,-y,z'
  '-x,-y,1/2+z'
  'x,x-y,1/2+z'
  '-x+y,-x,z'
  'y,x,z'
  'y,-x+y,1/2+z'
  '-x+y,y,1/2+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   0.03600 ?
Mg   0.33240   0.00000   0.22660 ?
O1   0.33333   0.66667   0.14620 ?
O2   0.48380   0.00000  -0.00470 ?
O3   0.66570   0.00000   0.29340 ?
O4   0.00000   0.00000   0.15020 ?
H3   0.62000   0.00000   0.36500   0.04800
H4   0.00000   0.00000   0.08100   0.03000
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 0.00530 0.00530 0.00720 0.00265 0.00000 0.00000
Mg 0.00580 0.00560 0.01210 0.00280 0.00040 0.00000
O1 0.00620 0.00620 0.00830 0.00310 0.00000 0.00000
O2 0.00900 0.00750 0.01370 0.00375 0.00390 0.00000
O3 0.00910 0.00770 0.01110 0.00385 0.00170 0.00000
O4 0.00840 0.00840 0.00880 0.00420 0.00000 0.00000