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#$Date: 2008-03-10 10:25:41 +0200 (Mon, 10 Mar 2008) $
#$Revision: 255 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/9006646.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_9006646
loop_
_publ_author_name
'Knight K S'
'Stretton I C'
'Schofield P F'
_publ_section_title
;
 Temperature evolution between 50 K and 320 K of the
 thermal expansion tensor of gypsum derived from neutron powder
 diffraction data
 Sample: T = 320 K
;
_journal_name_full               'Physics and Chemistry of Minerals'
_journal_page_first              477
_journal_page_last               483
_journal_volume                  26
_journal_year                    1999
_chemical_formula_sum            'Ca S O6 D4'
_chemical_name_mineral           Gypsum
_symmetry_space_group_name_H-M   'I 1 2/a 1'
_cell_angle_alpha                90
_cell_angle_beta                 118.494
_cell_angle_gamma                90
_cell_length_a                   5.6769
_cell_length_b                   15.2074
_cell_length_c                   6.5277
_cell_volume                     495.279
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
1/2+x,1/2+y,1/2+z
-x,y,1/2-z
1/2-x,1/2+y,-z
1/2+x,-y,z
+x,1/2-y,1/2+z
1/2-x,-y,1/2-z
-x,1/2-y,-z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Ca 0.50000 0.07860 0.25000
S 0.00000 0.07870 0.75000
O1 -0.03840 0.13260 0.55120
O2 0.24290 0.02150 0.83470
Ow 0.37840 0.18250 0.45540
D1 0.25040 0.16150 0.50090
D2 0.40220 0.24350 0.49000