data_global
_chemical_name_mineral 'Kozyrevskite'
loop_
_publ_author_name
'Pekov I V'
'Zubkova N V'
'Yapaskurt V O'
'Belakovskiy D I'
'Vigasina M F'
'Sidorov E G'
'Pushcharovsky D Y'
_journal_name_full 'Mineralogical Magazine'
_journal_volume 78 
_journal_year 2014
_journal_page_first 1553
_journal_page_last 1569
_publ_section_title
;
 New arsenate minerals from the Arsenatnaya fumarole, Tolbachik volcano,
 Kamchatka, Russia. II. Ericlaxmanite and kozyrevskite, two natural
 modifications of Cu4O(AsO4)2
;
_database_code_amcsd 0020529
_chemical_compound_source 'Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia'
_chemical_formula_sum 'Cu4 As2 O9'
_cell_length_a 8.2581
_cell_length_b 6.4026
_cell_length_c 13.8047
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 729.900
_exptl_crystal_density_diffrn      4.987
_symmetry_space_group_name_H-M 'P n m a'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2-y,z'
  '-x,1/2+y,-z'
  '1/2-x,1/2+y,1/2+z'
  '1/2+x,1/2-y,1/2-z'
  '1/2+x,y,1/2-z'
  '1/2-x,-y,1/2+z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Cu1   0.58040   0.25000   0.41200   0.01430
Cu2   0.64260   0.00570   0.84500   0.00990
Cu3   0.36050   0.25000   0.94800   0.01430
As1   0.16130   0.25000   0.41410   0.01210
As2   0.49760   0.25000   0.65630   0.00740
O1   0.60500   0.25000   0.75950   0.01600
O2   0.59800   0.25000   0.97030   0.01300
O3   0.62000   0.25000   0.56100   0.02700
O4   0.40700  -0.02800   0.86270   0.01400
O5   0.38500   0.03400   0.65030   0.01200
O6   0.31300   0.25000   0.08820   0.01500
O7   0.35430   0.25000   0.40500   0.03400