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#$Date: 2008-03-10 10:25:41 +0200 (Mon, 10 Mar 2008) $
#$Revision: 255 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/9001091.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_9001091
loop_
_publ_author_name
'Mellini M'
'Zanazzi P F'
_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
;
_journal_name_full               'American Mineralogist'
_journal_page_first              943
_journal_page_last               948
_journal_volume                  72
_journal_year                    1987
_chemical_formula_sum            'Si2 Mg3 O9 H4'
_chemical_name_mineral           Lizardite
_symmetry_space_group_name_H-M   'P 63 c m'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_length_a                   5.318
_cell_length_b                   5.318
_cell_length_c                   14.541
_cell_volume                     356.141
loop_
_symmetry_equiv_pos_as_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