data_9007586
_chemical_name 'Tsumcorite'
loop_
_publ_author_name
'Tillmanns E'
'Gebert W'
_journal_name_full "Acta Crystallographica, Section B"
_journal_volume 29
_journal_year 1973
_journal_page_first 2789
_journal_page_last 2794
_publ_section_title
;
 The crystal structure of tsumcorite, a new mineral from the Tsumeb Mine, S.W. A
 Locality: Tsumeb mine, Namibia, Africa
;
_chemical_formula_sum 'Pb Zn Fe As2 O10 H6'
_cell_length_a 9.124
_cell_length_b 6.329
_cell_length_c 7.577
_cell_angle_alpha 90
_cell_angle_beta 115.28
_cell_angle_gamma 90
_cell_volume 395.637
_symmetry_space_group_name_H-M 'C 1 2/m 1'
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,z'
  '1/2+x,1/2-y,z'
  '-x,y,-z'
  '1/2-x,1/2+y,-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
Pb   0.00000   0.00000   0.00000   1.00000
Zn   0.25000   0.25000   0.50000   0.50000
Fe3+   0.25000   0.25000   0.50000   0.38000
Fe2+   0.25000   0.25000   0.50000   0.12000
As   0.91790   0.50000   0.21550   1.00000
O2   0.31040   0.00000   0.35450   1.00000
O3   0.03480   0.28080   0.26500   1.00000
O4   0.22150   0.50000   0.01470   1.00000
Wat1   0.34050   0.50000   0.40660   0.50000
O-H1   0.34050   0.50000   0.40660   0.50000