#------------------------------------------------------------------------------
#$Date: 2008-04-03 11:11:48 +0100 (Thu, 03 Apr 2008) $
#$Revision: 326 $
#$URL: svn://www.crystallography.net/cod/cif/2/2101248.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_2101248
loop_
_publ_author_name
'Ibberson, R. M.'
'Prager, M.'
_publ_section_title
;
 The <i>Ab initio</i> crystal-structure determination of
 perdeuterodimethylacetylene by high-resolution neutron powder
 diffraction
;
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              71
_journal_page_last               76
_journal_volume                  51
_journal_year                    1995
_chemical_formula_sum            'C4 D6'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2y'
_symmetry_space_group_name_H-M   'C 1 2/m 1'
_cell_angle_alpha                90.0
_cell_angle_beta                 101.0535(5)
_cell_angle_gamma                90.0
_cell_formula_units_Z            2
_cell_length_a                   7.15889(4)
_cell_length_b                   6.45529(2)
_cell_length_c                   4.07818(9)
_cell_volume                     184.97
_diffrn_radiation_type           Mo
_diffrn_radiation_wavelength     0.71073
_[local]_cod_data_source_file    an0505.cif
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
C(1) .0787(4) .0 .0839(6) .0040(10)
C(2) .2732(4) .0 .2810(10) .0040(10)
D(1) .2700(3) .0 .5475(10) .028(4)
D(2) .3512(3) .1342(3) .2281(6) .024(2)
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
C(1) C(1)* 1.201(4)
C(2) D(1) 1.091(6)
C(1) C(2) 1.468(4)
C(2) D(2) 1.075(3)
loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle
C(1)* C(1) C(2) 178.5(3)
C(1) C(2) D(2) 111.4(3)
C(1) C(2) D(1) 110.3(3)