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#$Date: 2025-08-18 18:02:58 +0300 (Mon, 18 Aug 2025) $
#$Revision: 301777 $
#$URL: file:///home/coder/svn-repositories/cod/cif/1/52/88/1528892.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_1528892
loop_
_publ_author_name
'Stein, I.'
'Naether, C.'
'Ruschewitz, U.'
_publ_section_title
;
 (N H4)2 (C4 O4), an anhydrous alt of acetylenedicarboxylic acid
;
_journal_name_full               'Solid State Sciences'
_journal_page_first              353
_journal_page_last               358
_journal_volume                  8
_journal_year                    2006
_chemical_formula_sum            'C4 H8 N2 O4'
_chemical_name_systematic        '(N H4)2 C4 O4'
_space_group_IT_number           12
_symmetry_space_group_name_Hall  '-C 2y'
_symmetry_space_group_name_H-M   'C 1 2/m 1'
_cell_angle_alpha                90
_cell_angle_beta                 109.58
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   8.205
_cell_length_b                   10.506
_cell_length_c                   4.146
_cell_volume                     336.726
_citation_journal_id_ASTM        SSSCFJ
_cod_data_source_file            Stein_SSSCFJ_2006_902.cif
_cod_data_source_block           C4H8N2O4
_cod_database_code               1528892
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
-x,y,-z
-x,-y,-z
x,-y,z
x+1/2,y+1/2,z
-x+1/2,y+1/2,-z
-x+1/2,-y+1/2,-z
x+1/2,-y+1/2,z
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
H2 H+1 0.049 0.3348 0.371 1 0.0
O1 O-2 0.22023 0.60727 0.17701 1 0.0
N1 N-3 0 0.28589 0.5 1 0.0
H1 H+1 0.0821 0.2354 0.646 1 0.0
C1 C+1 0.27812 0.5 0.1386 1 0.0
C2 C+1 0.43544 0.5 0.0375 1 0.0
loop_
_cod_related_entry_id
_cod_related_entry_database
_cod_related_entry_code
1 PubChem 139046213
