data_global
_chemical_name_mineral 'Lizardite-1T'
loop_
_publ_author_name
'Gregorkiewitz M'
'Lebech B'
'Mellini M'
'Viti C'
_journal_name_full 'American Mineralogist'
_journal_volume 81 
_journal_year 1996
_journal_page_first 1111
_journal_page_last 1116
_publ_section_title
;
 Hydrogen positions and thermal expansion in lizardite-1T from Elba: A
 low-temperature study using Rietveld refinement of neutron diffraction data
 T = 8 K
;
_database_code_amcsd 0001834
_chemical_formula_sum 'Si2 Mg3 H6 O9'
_cell_length_a 5.3267
_cell_length_b 5.3267
_cell_length_c 7.2539
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 178.246
_exptl_crystal_density_diffrn      2.600
_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   0.07000   0.02000
Mg   0.32400   0.00000   0.44700   0.02000
H3   0.64600   0.00000   0.71500   0.07800
H4   0.04600   0.04600   0.17200   0.07800
O1   0.33333   0.66667   0.29200   0.00200
O2   0.50700   0.00000  -0.01400   0.08800
O3   0.66500   0.00000   0.58700   0.00200
O4   0.00000   0.00000   0.29100   0.00200