#------------------------------------------------------------------------------
#$Date: 2009-11-23 07:50:56 +0200 (Mon, 23 Nov 2009) $
#$Revision: 903 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/9011104.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided the American Mineralogist Crystal Structure Database,
# http://rruff.geo.arizona.edu/AMS/amcsd.php
#
# The file may be used within the scientific community so long as
# proper attribution is given to the journal article from which the
# data were obtained.
#
data_9011104
loop_
_publ_author_name
'Smolin, Y. I.'
'Shepelev, Y. F.'
_publ_section_title
;
 The crystal structures of the rare earth pyrosilicates
 Locality: synthetic
;
_journal_name_full               'Acta Crystallographica, Section B'
_journal_page_first              484
_journal_page_last               492
_journal_volume                  26
_journal_year                    1970
_chemical_formula_sum            'O7 Si2 Yb2'
_chemical_name_mineral           Keiviite-(Yb)
_space_group_IT_number           12
_symmetry_space_group_name_Hall  '-C 2y'
_symmetry_space_group_name_H-M   'C 1 2/m 1'
_cell_angle_alpha                90
_cell_angle_beta                 102.12
_cell_angle_gamma                90
_cell_length_a                   6.802
_cell_length_b                   8.875
_cell_length_c                   4.703
_cell_volume                     277.581
_[local]_cod_data_source_file    08671.cif
_[local]_cod_data_source_block   global
_[local]_cod_chemical_formula_sum_orig 'Yb2 Si2 O7'
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
1/2+x,1/2+y,z
x,-y,z
1/2+x,1/2-y,z
-x,y,-z
1/2-x,1/2+y,-z
-x,-y,-z
1/2-x,1/2-y,-z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Yb 0.50000 0.80687 0.00000 0.00317
Si 0.71890 0.50000 0.41250 0.00469
O1 0.50000 0.50000 0.50000 0.01292
O2 0.88310 0.50000 0.71510 0.00633
O3 0.73610 0.65040 0.21970 0.00684