#------------------------------------------------------------------------------
#$Date: 2008-01-26 15:05:32 +0200 (Sat, 26 Jan 2008) $
#$Revision: 19 $
#$URL: file:///home/coder/svn-repositories/cod/cif/1/1009057.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_1009057
_chemical_name_systematic          'Disodium zinc germanate'
_chemical_formula_structural       'Na2 Zn (Ge O4)'
_chemical_formula_sum              'Ge Na2 O4 Zn'
_publ_section_title
;
The crystal structures of Na2 Zn Si O4, Na2 Zn Ge O4 and Na2 Mg Ge O4
;
loop_
_publ_author_name
  'Joubert-Bettan, C A'
  'Lachenal, R'
  'Bertaut, E F'
  'Parthe, E'
_journal_name_full                 'Journal of Solid State Chemistry'
_journal_coden_ASTM                JSSCBI
_journal_volume                    1
_journal_year                      1969
_journal_page_first                1
_journal_page_last                 5
_cell_length_a                     7.17
_cell_length_b                     5.56
_cell_length_c                     5.32
_cell_angle_alpha                  90
_cell_angle_beta                   90.1
_cell_angle_gamma                  90
_cell_volume                       212.1
_cell_formula_units_Z              2
_symmetry_space_group_name_H-M     'P 1 n 1'
_symmetry_Int_Tables_number        7
_symmetry_cell_setting             monoclinic
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '1/2+x,-y,1/2+z'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  Na1+   1.000
  Zn2+   2.000
  Ge4+   4.000
  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
  Na1   Na1+   2 a 0.746 0.695 0.997 1.  0 d
  Na2   Na1+   2 a 0.505 0.177 0.997 1.  0 d
  Zn1   Zn2+   2 a 0.003 0.192 0.999 1.  0 d
  Ge1   Ge4+   2 a 0.245 0.688 0. 1.  0 d
  O1    O2-    2 a 0.724 0.601 0.435 1.  0 d
  O2    O2-    2 a 0.556 0.154 0.437 1.  0 d
  O3    O2-    2 a 0.935 0.221 0.359 1.  0 d
  O4    O2-    2 a 0.286 0.689 0.302 1.  0 d
_refine_ls_R_factor_all            0.15