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#$Date: 2024-05-16 09:36:09 +0300 (Thu, 16 May 2024) $
#$Revision: 291877 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/01/19/9011906.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_9011906
loop_
_publ_author_name
'Yakubovich, O. V.'
'Simonov, M. A.'
'Voloshin, A. V.'
'Pakhomovsky, Y. A.'
_publ_section_title
;
 Crystal structure of keivite Yb2[Si2O7]
;
_journal_name_full               'Soviet Physics Doklady'
_journal_page_first              930
_journal_page_last               932
_journal_volume                  31
_journal_year                    1986
_chemical_compound_source        'Kola Peninsula, Russia'
_chemical_formula_sum
'Dy0.04 Er0.16 Ho0.02 Lu0.22 O7 Si2 Tm0.08 Y0.06 Yb1.42'
_chemical_name_mineral           Keiviite-(Yb)
_space_group_IT_number           12
_symmetry_space_group_name_Hall  '-A 2y'
_symmetry_space_group_name_H-M   'A 1 2/m 1'
_cell_angle_alpha                90
_cell_angle_beta                 102.01
_cell_angle_gamma                90
_cell_length_a                   4.715
_cell_length_b                   8.870
_cell_length_c                   6.805
_cell_formula_units_Z            2
_cell_volume                     278.370
_database_code_amcsd             0015614
_exptl_crystal_density_diffrn    6.058
_cod_original_formula_sum
'(Yb1.42 Lu.22 Er.16 Tm.08 Y.06 Dy.04 Ho.02) Si2 O7'
_cod_database_code               9011906
loop_
_space_group_symop_operation_xyz
x,y,z
x,1/2+y,1/2+z
x,-y,z
x,1/2-y,1/2+z
-x,-y,-z
-x,1/2-y,1/2-z
-x,y,-z
-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
_atom_site_U_iso_or_equiv
Yb 0.00000 0.80653 0.50000 0.71000 0.00671
Lu 0.00000 0.80653 0.50000 0.11000 0.00671
Er 0.00000 0.80653 0.50000 0.08000 0.00671
Tm 0.00000 0.80653 0.50000 0.04000 0.00671
Y 0.00000 0.80653 0.50000 0.03000 0.00671
Dy 0.00000 0.80653 0.50000 0.02000 0.00671
Ho 0.00000 0.80653 0.50000 0.01000 0.00671
Si 0.41270 0.50000 0.71880 1.00000 0.00963
O1 0.50000 0.50000 0.50000 1.00000 0.01900
O2 0.71600 0.50000 0.88100 1.00000 0.01140
O3 0.22000 0.65060 0.73500 1.00000 0.01393
loop_
_cod_related_entry_id
_cod_related_entry_database
_cod_related_entry_code
1 AMCSD 0015614
