#------------------------------------------------------------------------------
#$Date: 2009-11-16 03:43:51 +0200 (Mon, 16 Nov 2009) $
#$Revision: 853 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/9000774.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_9000774
_space_group_IT_number           142
_symmetry_space_group_name_Hall  '-I 4bd 2c'
_symmetry_space_group_name_H-M   'I 41/a c d :2'
_[local]_cod_cif_authors_sg_H-M  'I 41/a c d'
loop_
_publ_author_name
'de Villiers J P R'
_publ_section_title
;
 The crystal structure of braunite II and its relation to bixbyite and braunite
;
_journal_name_full               'American Mineralogist'
_journal_page_first              756
_journal_page_last               765
_journal_volume                  65
_journal_year                    1980
_chemical_formula_sum            '(Mn11.62 Fe2.38) Si O24'
_chemical_name_mineral           Braunite
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_length_a                   9.431
_cell_length_b                   9.431
_cell_length_c                   37.774
_cell_volume                     3359.761
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
1/2+x,1/2+y,1/2+z
1/4-y,3/4-x,3/4+z
3/4-y,1/4-x,1/4+z
1/4+y,3/4+x,3/4-z
3/4+y,1/4+x,1/4-z
1/4+y,3/4-x,1/4-z
3/4+y,1/4-x,3/4-z
1/4-y,3/4+x,1/4+z
3/4-y,1/4+x,3/4+z
1/2+x,-y,z
+x,1/2-y,1/2+z
1/2-x,y,-z
-x,1/2+y,1/2-z
1/2+x,y,1/2-z
+x,1/2+y,-z
1/2-x,-y,1/2+z
-x,1/2-y,+z
1/4+y,1/4+x,1/4+z
3/4+y,3/4+x,3/4+z
1/4-y,1/4-x,1/4-z
3/4-y,3/4-x,3/4-z
1/4-y,1/4+x,3/4-z
3/4-y,3/4+x,1/4-z
1/4+y,1/4-x,3/4+z
3/4+y,3/4-x,1/4+z
-x,y,1/2+z
1/2-x,1/2+y,+z
x,-y,1/2-z
1/2+x,1/2-y,-z
-x,-y,-z
1/2-x,1/2-y,1/2-z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Mn1 0.00000 0.25000 -0.00918 0.83000
Fe1 0.00000 0.25000 -0.00918 0.17000
Mn2 0.20970 0.00000 0.25000 0.83000
Fe2 0.20970 0.00000 0.25000 0.17000
Mn3 0.24080 0.49080 0.12500 0.83000
Fe3 0.24080 0.49080 0.12500 0.17000
Mn4 0.03120 0.00060 0.06290 0.83000
Fe4 0.03120 0.00060 0.06290 0.17000
Mn5 -0.00960 0.00440 0.18772 0.83000
Fe5 -0.00960 0.00440 0.18772 0.17000
Si 0.00000 0.25000 0.37500 1.00000
O1 0.11970 0.17150 0.02560 1.00000
O2 0.33140 0.40100 0.03110 1.00000
O3 0.39820 0.12270 0.04120 1.00000
O4 0.11780 0.40710 0.08970 1.00000
O5 0.17010 0.11210 0.09090 1.00000
O6 0.38740 0.33610 0.10040 1.00000
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
Mn1 0.00740 0.01030 0.00630 0.00290 0.00000 0.00000
Fe1 0.00740 0.01030 0.00630 0.00290 0.00000 0.00000
Mn2 0.00630 0.00940 0.00740 0.00000 0.00000 0.00250
Fe2 0.00630 0.00940 0.00740 0.00000 0.00000 0.00250
Mn3 0.00730 0.00730 0.00630 0.00010 -0.00050 0.00050
Fe3 0.00730 0.00730 0.00630 0.00010 -0.00050 0.00050
Mn4 0.00570 0.00690 0.00770 0.00070 0.00050 -0.00170
Fe4 0.00570 0.00690 0.00770 0.00070 0.00050 -0.00170
Mn5 0.00460 0.00600 0.00620 -0.00060 -0.00020 -0.00020
Fe5 0.00460 0.00600 0.00620 -0.00060 -0.00020 -0.00020
Si 0.00490 0.00490 0.00570 0.00000 0.00000 0.00000
O1 0.01080 0.01060 0.00670 0.00300 -0.00110 0.00080
O2 0.00710 0.00760 0.00660 -0.00070 0.00120 0.00130
O3 0.00370 0.00970 0.01120 -0.00070 0.00190 0.00440
O4 0.00570 0.00570 0.00610 -0.00130 -0.00220 0.00280
O5 0.00670 0.00830 0.00520 0.00060 -0.00120 0.00210
O6 0.00770 0.00950 0.00640 0.00010 -0.00030 -0.00030