#------------------------------------------------------------------------------
#$Date: 2009-11-18 16:56:34 +0200 (Wed, 18 Nov 2009) $
#$Revision: 858 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/9009498.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_9009498
loop_
_publ_author_name
'Burns P C'
'Hawthorne F C'
_publ_section_title
;
 Hydrogen bonding in borcarite, an unusual borate-carbonate mineral
 Locality: Yakutskaya, Russia
;
_journal_name_full               'Mineralogical Magazine'
_journal_page_first              297
_journal_page_last               304
_journal_volume                  59
_journal_year                    1995
_chemical_formula_sum            'C2 H6 B4 Ca4 Mg O18'
_[local]_cod_chemical_formula_sum_orig 'Ca4 Mg B4 C2 O18 H6'
_chemical_name_mineral           Borcarite
_symmetry_space_group_name_H-M   'C 1 2/m 1'
_cell_angle_alpha                90
_cell_angle_beta                 102.04
_cell_angle_gamma                90
_cell_length_a                   17.840
_cell_length_b                   8.380
_cell_length_c                   4.445
_cell_volume                     649.906
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
Ca 0.15543 0.23368 0.15480 ?
Mg 0.00000 0.00000 0.00000 ?
B1 0.00000 0.24000 0.50000 ?
B2 0.09480 0.00000 0.61710 ?
C 0.30480 0.00000 0.25150 ?
O1 0.09940 0.00000 0.30710 ?
O2 0.05513 0.14270 0.72040 ?
O-h3 0.04149 0.33850 0.30950 ?
O4 0.21500 0.36540 0.64870 ?
O-h5 0.17430 0.00000 0.82360 ?
O6 0.34410 0.00000 0.03980 ?
H1 0.00500 0.35500 0.12700 0.03000
H2 0.21200 0.00000 0.69800 0.03000
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
Ca 0.00810 0.00770 0.01090 -0.00080 0.00150 -0.00120
Mg 0.00460 0.00720 0.00400 0.00000 0.00100 0.00000
B1 0.01240 0.01250 0.01390 0.00000 0.00230 0.00000
B2 0.00650 0.00840 0.00820 0.00000 -0.00050 0.00000
C 0.00830 0.01250 0.00920 0.00000 -0.00240 0.00000
O1 0.00910 0.00970 0.00670 0.00000 0.00150 0.00000
O2 0.00880 0.00770 0.00730 0.00170 0.00040 0.00010
Oh3 0.01050 0.00900 0.01000 -0.00120 0.00300 0.00140
O4 0.01430 0.02060 0.02210 0.00570 -0.00360 -0.01180
Oh5 0.00710 0.01370 0.00930 0.00000 0.00070 0.00000
O6 0.02460 0.01550 0.01560 0.00000 0.01050 0.00000