#------------------------------------------------------------------------------
#$Date: 2008-01-14 00:15:36 +0200 (Mon, 14 Jan 2008) $
#$Revision: 14 $
#$URL: file:///home/coder/svn-repositories/cod/cif/2/2002749.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_2002749
_chemical_name_systematic          'Tetrazink bis(arsenate(V)) oxide - HT'
_chemical_formula_structural       'Zn4 (As O4)2 O'
_chemical_formula_sum              'As2 O9 Zn4'
_publ_section_title
;
Zur Kenntnis der Tief- und Hochtemperaturform eines Oxidarsenates des
Zinks: Zn O Zn3 (As O4)2
;
loop_
_publ_author_name
  'Mueller-Buschbaum, Hk'
  'Frerichs, D'
  'Park, C H'
_journal_name_full
;
Zeitschrift fuer Naturforschung, Teil B. Anorganische Chemie,
Organische Chemie (42,1987-)
;
_journal_volume                    51
_journal_year                      1996
_journal_page_first                233
_journal_page_last                 239
_cell_length_a                     9.743(3)
_cell_length_b                     8.163(8)
_cell_length_c                     17.933(3)
_cell_angle_alpha                  90
_cell_angle_beta                   91.55(2)
_cell_angle_gamma                  90
_cell_volume                       1425.7
_cell_formula_units_Z              8
_symmetry_space_group_name_H-M     'P 1 21/n 1'
_symmetry_Int_Tables_number        14
_symmetry_cell_setting             monoclinic
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '1/2+x,1/2-y,1/2+z'
  '-x,-y,-z'
  '1/2-x,1/2+y,1/2-z'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  As5+   5.000
  Zn2+   2.000
  O2-   -2.000
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_symmetry_multiplicity
_atom_site_Wyckoff_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_attached_hydrogens
_atom_site_calc_flag
  As1   As5+   4 e 0.98119(3) 0.25824(3) 0.025440(13) 1.  0 d
  As2   As5+   4 e 0.10676(3) 0.74575(3) 0.248120(13) 1.  0 d
  As3   As5+   4 e 0.76539(3) 0.24413(3) 0.233230(12) 1.  0 d
  As4   As5+   4 e 0.64517(3) 0.75152(3) 0.010080(13) 1.  0 d
  Zn1   Zn2+   4 e 0.86932(5) 0.94318(3) 0.11998(2) 1.  0 d
  Zn2   Zn2+   4 e 0.55240(4) 0.08483(4) 0.10951(2) 1.  0 d
  Zn3   Zn2+   4 e 0.20129(4) 0.07094(4) 0.13166(2) 1.  0 d
  Zn4   Zn2+   4 e 0.86776(5) 0.55654(3) 0.11981(2) 1.  0 d
  Zn5   Zn2+   4 e 0.33865(4) 0.76957(4) 0.05503(2) 1.  0 d
  Zn6   Zn2+   4 e 0.20768(5) 0.46184(4) 0.13114(2) 1.  0 d
  Zn7   Zn2+   4 e 0.40522(5) 0.81584(4) 0.20985(2) 1.  0 d
  Zn8   Zn2+   4 e 0.54744(5) 0.51302(4) 0.15132(2) 1.  0 d
  O1    O2-    4 e 1.0701(2) 0.2546(2) -0.05357(8) 1.  0 d
  O2    O2-    4 e 0.2703(2) 0.7561(2) 0.28700(9) 1.  0 d
  O3    O2-    4 e 0.6652(2) 0.2500(2) 0.30853(9) 1.  0 d
  O4    O2-    4 e 0.6641(3) 0.5908(2) 0.06855(11) 1.  0 d
  O5    O2-    4 e 1.0160(2) 0.4242(2) 0.07867(9) 1.  0 d
  O6    O2-    4 e 0.4933(2) 0.2810(2) 0.17810(9) 1.  0 d
  O7    O2-    4 e 1.0106(2) 0.0916(2) 0.07848(10) 1.  0 d
  O8    O2-    4 e 0.7551(3) 0.4236(2) 0.18696(10) 1.  0 d
  O9    O2-    4 e 0.4785(2) 0.7619(2) -0.02066(9) 1.  0 d
  O10   O2-    4 e 0.6836(2) 0.9295(2) 0.05442(10) 1.  0 d
  O11   O2-    4 e 0.7380(2) 0.7302(2) -0.06583(9) 1.  0 d
  O12   O2-    4 e 0.7273(2) 0.0910(2) 0.17411(10) 1.  0 d
  O13   O2-    4 e 0.9267(3) 0.2004(2) 0.26613(11) 1.  0 d
  O14   O2-    4 e 0.3803(3) -0.0411(2) 0.12278(10) 1.  0 d
  O15   O2-    4 e 0.3601(3) 0.6110(2) 0.13519(10) 1.  0 d
  O16   O2-    4 e 0.0970(3) -0.1079(2) 0.18390(11) 1.  0 d
  O17   O2-    4 e 0.0827(2) 0.5539(2) 0.21568(10) 1.  0 d
  O18   O2-    4 e 0.8154(3) 0.2719(3) 0.00863(12) 1.  0 d
_refine_ls_R_factor_all            0.2855