#------------------------------------------------------------------------------
#$Date: 2009-11-16 03:43:51 +0200 (Mon, 16 Nov 2009) $
#$Revision: 853 $
#$URL: file:///home/coder/svn-repositories/cod/cif/2/2005594.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_2005594
_journal_name_full               'Acta Crystallographica C'
_journal_volume                  52
_journal_year      1996
_journal_page_first 	2662
_journal_page_last 	2664
_publ_section_title
;
 K~2~Be~2~Si~3~O~9~, a Potassium Beryllium Silicate Framework Built from
 Edge-Sharing Be-O Tetrahedra and Three-Ring Silicate Tetrahedra
;
_chemical_formula_iupac 	'K2 Be2 Si3 O9'
_chemical_formula_sum 	'Be2 K2 O9 Si3'
_chemical_formula_weight 	324.49
_symmetry_cell_setting 	monoclinic
_space_group_IT_number           14
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_[local]_cod_cif_authors_sg_H-M  'P 21/c'
loop_
_symmetry_equiv_pos_as_xyz
 'x, y, z'
 '-x, y+1/2, -z+1/2'
 '-x, -y, -z'
 'x, -y-1/2, z-1/2'
_cell_length_a 	10.259(6)
_cell_length_b 	6.940(4)
_cell_length_c 	12.175(7)
_cell_angle_alpha 	90.00
_cell_angle_beta 	106.764(7)
_cell_angle_gamma 	90.00
_cell_volume 	830.0(8)
_cell_formula_units_Z 	4
_exptl_crystal_density_diffrn 	2.597
_cell_measurement_temperature 	293(2)
loop_
_atom_site_label
_atom_site_occupancy
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
 K1 1 0.45980(5) 0.12625(8) 0.64407(4) 0.01702(13)
 K2 1 0.06300(6) 0.60686(9) 0.14762(5) 0.02012(14)
 Be1 1 0.4288(3) 0.5907(4) 0.5422(2) 0.0079(5)
 Be2 1 0.0650(3) 0.5723(4) 0.4424(2) 0.0076(5)
 Si1 1 0.25741(6) 0.31784(9) 0.37323(5) 0.00687(13)
 Si2 1 0.76207(6) 0.11422(8) 0.58064(5) 0.00758(13)
 Si3 1 0.75823(5) -0.03130(9) 0.81819(5) 0.00707(13)
 O1 1 0.40109(15) 0.4254(3) 0.43324(14) 0.0099(3)
 O2 1 0.10150(15) 0.4809(2) 0.57826(14) 0.0092(3)
 O3 1 0.7646(2) 0.1263(2) 0.71782(14) 0.0115(3)
 O4 1 0.2579(2) 0.2544(2) 0.74358(13) 0.0100(3)
 O5 1 0.2406(2) 0.1216(2) 0.44478(14) 0.0103(3)
 O6 1 0.1276(2) 0.4505(2) 0.35968(14) 0.0108(3)
 O7 1 0.6224(2) 0.1988(2) 0.50017(15) 0.0120(3)
 O8 1 0.8991(2) 0.2022(2) 0.56074(15) 0.0112(3)
 O9 1 0.6239(2) 0.0067(3) 0.85612(14) 0.0113(3)