data_9001639
_publ_section_title
;Crystal structure of lizardite-1T from Elba, Italy Sample: MFN3-6 Note:
 U(1,2) for Si, O2 and O4 have been changed to match symmetry constraints.
;
_journal_name_full               'American Mineralogist'
_journal_page_first              1194
_journal_page_last               1198
_journal_volume                  79
_journal_year                    1994
_chemical_formula_sum            'H4 Mg3 O9 Si2'
_chemical_name_mineral           Lizardite
_space_group_IT_number           157
_symmetry_space_group_name_Hall  'P 3 -2'
_symmetry_space_group_name_H-M   'P 3 1 m'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_length_a                   5.338
_cell_length_b                   5.338
_cell_length_c                   7.257
_cell_volume                     179.079
_exptl_crystal_density_diffrn    2.570
_[local]_cod_chemical_formula_sum_orig 'Si2 Mg3 O9 H4'
_cod_database_code               9001639
loop_
_symmetry_equiv_pos_as_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_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 0.01010 0.01010 0.00710 0.00505 0.00000 0.00000
Mg 0.00990 0.00960 0.01100 0.00480 0.00000 0.00000
O1 0.01160 0.01160 0.00440 0.00580 0.00000 0.00000
O2 0.02390 0.01670 0.00930 0.00835 0.00090 0.00000
O3 0.01280 0.01200 0.00730 0.00600 0.00020 0.00000
O4 0.01320 0.01320 0.00570 0.00660 0.00000 0.00000
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 0.06990 ?
Mg 0.33260 0.00000 0.45130 ?
O1 0.33333 0.66667 0.29200 ?
O2 0.50710 0.00000 -0.00990 ?
O3 0.66620 0.00000 0.58690 ?
O4 0.00000 0.00000 0.29900 ?
H1 0.66000 0.00000 0.71000 0.05000
H2 0.00000 0.00000 0.20000 0.05000
