data_global
_chemical_name_mineral 'Lizardite-2H1'
loop_
_publ_author_name
'Guggenheim S'
'Zhan W'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 36 
_journal_year 1998
_journal_page_first 1587
_journal_page_last 1594
_publ_section_title
;
 Effect of temperature on the structures of lizardite-1T and lizardite-2H1
 Sample: T = 475 C
;
_database_code_amcsd 0005588
_chemical_formula_sum 'Mg3 Si2 H4 O9'
_cell_length_a 5.345
_cell_length_b 5.345
_cell_length_c 14.662
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 362.760
_exptl_crystal_density_diffrn      2.537
_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
Mg   0.33190   0.00000   0.22430
Si   0.33333   0.66667   0.03440
H1   0.62100   0.00000   0.34300
H2   0.00000   0.00000   0.06800
O1   0.33333   0.66667   0.14370
O2   0.49300   0.00000  -0.00230
O3   0.66800   0.00000   0.29090
O4   0.00000   0.00000   0.14900
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
Mg 0.01800 0.01700 0.02800 0.00850 -0.00100 0.00000
Si 0.01500 0.01500 0.01700 0.00750 0.00000 0.00000
O1 0.02100 0.02100 0.02000 0.01050 0.00000 0.00000
O2 0.03600 0.02700 0.03100 0.01350 -0.01200 0.00000
O3 0.03100 0.03100 0.02100 0.01550 0.00300 0.00000
O4 0.02500 0.02500 0.02500 0.01250 0.00000 0.00000