data_global
_chemical_name_mineral 'Erikapohlite'
loop_
_publ_author_name
'Schluter J'
'Malcherek T'
'Mihailova B'
'Gebhard G'
_journal_name_full 'Neues Jahrbuch fur Mineralogie, Abhandlungen'
_journal_volume 190 
_journal_year 2013
_journal_page_first 319
_journal_page_last 325
_publ_section_title
;
 The new mineral erikapohlite, Cu3(Zn,Cu,Mg)4Ca2(AsO4)6*2H2O,
 the Ca-dominant analogue of keyite, from Tsumeb, Namibia
;
_database_code_amcsd 0020694
_chemical_compound_source 'Tsumeb, Namibia'
_chemical_formula_sum 'Cu1.79 Zn1.2 Mg.36 Ca As3 O12.7 H1.4'
_cell_length_a 12.6564
_cell_length_b 12.7282
_cell_length_c 6.9148
_cell_angle_alpha 90
_cell_angle_beta 113.939
_cell_angle_gamma 90
_cell_volume 1018.105
_exptl_crystal_density_diffrn      4.374
_symmetry_space_group_name_H-M 'C 1 2/c 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,1/2+z'
  '1/2+x,1/2-y,1/2+z'
  '-x,y,1/2-z'
  '1/2-x,1/2+y,1/2-z'
  '-x,-y,-z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
Cu4   0.00000   0.48500   0.75000   1.00000   0.04700
Cu6   0.00000   0.00000   0.00000   0.35000   0.03000
Zn   0.73200   0.65700   0.13800   0.60000   0.04200
Cu   0.73200   0.65700   0.13800   0.22000   0.04200
Mg   0.73200   0.65700   0.13800   0.18000   0.04200
Ca   0.00000   0.24500   0.25000   1.00000   0.03600
As1   0.00000   0.27400   0.75000   1.00000   0.04900
As2   0.74800   0.38900   0.14000   1.00000   0.05100
O1   0.70300   0.50700   0.13400   1.00000   0.03000
O2   0.80600   0.17500   0.09300   1.00000   0.03000
O3   0.72600   0.30800   0.29600   1.00000   0.03000
Wat4   0.00000   0.03900   0.25000   0.70000   0.03000
O5   0.09200   0.37600   0.74600   1.00000   0.03000
O6   0.03800   0.19500   0.94700   1.00000   0.03000
O7   0.89900   0.40700   0.22700   1.00000   0.03000