#------------------------------------------------------------------------------
#$Date: 2008-03-10 08:25:41 +0000 (Mon, 10 Mar 2008) $
#$Revision: 255 $
#$URL: svn://www.crystallography.net/cod/cif/9/9009710.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_9009710
loop_
_publ_author_name
'Kawamura K'
'Iiyama J T'
_publ_section_title
;
 Crystallochemistry and thermochemistry of sodipotassic copper silicate Na2-2xK2xCuSi4O10
;
_journal_name_full               'Bulletin de Mineralogie'
_journal_page_first              387
_journal_page_last               395
_journal_volume                  104
_journal_year                    1981
_chemical_formula_sum            'K2 Cu Si4 O10'
_chemical_name_mineral           K2CuSi4O10
_symmetry_space_group_name_H-M   'P 1 21/m 1'
_cell_angle_alpha                90
_cell_angle_beta                 110.94
_cell_angle_gamma                90
_cell_length_a                   11.285
_cell_length_b                   8.244
_cell_length_c                   11.065
_cell_volume                     961.429
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
x,1/2-y,z
-x,1/2+y,-z
-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
K1 0.02810 0.25000 0.02950 0.02039
K2 0.05500 0.25000 0.44320 0.01267
K3 0.45700 0.25000 0.52390 0.01722
K4 0.41390 0.25000 0.91710 0.01532
Cu 0.21200 0.49690 0.28860 0.00760
Si1 0.25080 0.56530 0.01490 0.00684
Si2 0.46430 0.44100 0.22880 0.00735
Si3 0.26080 0.55640 0.59670 0.00671
Si4 0.08960 0.44060 0.74920 0.00735
O1 0.46300 0.25000 0.19240 0.01684
O2 0.27090 0.75000 0.57990 0.01925
O3 0.06590 0.25000 0.71170 0.02090
O4 0.23460 0.75000 0.95910 0.01229
O5 0.40260 0.53170 0.08740 0.00988
O6 0.17270 0.53000 0.10590 0.01355
O7 0.03190 0.46810 0.24830 0.01368
O8 0.39390 0.48500 0.32490 0.01444
O9 0.24770 0.46090 0.46890 0.01267
O10 0.14070 0.52130 0.64200 0.01393
O11 0.38840 0.49810 0.71620 0.01191
O12 0.20660 0.44520 0.88910 0.01127