data_global
_chemical_name_mineral 'Tangeite'
loop_
_publ_author_name
'Basso R'
'Palenzona A'
'Zefiro L'
_journal_name_full 'Neues Jahrbuch fur Mineralogie, Monatshefte'
_journal_volume 1989 
_journal_year 1989
_journal_page_first 300
_journal_page_last 308
_publ_section_title
;
 Crystal structure refinement of a Sr-bearing term related to copper
 vanadates and arsenates of adelite and descloizite groups
;
_database_code_amcsd 0014838
_chemical_compound_source 'Molinello mine, Val Graveglia, Northern Appenines, Eastern Liguria, Italy'
_chemical_formula_sum '(Ca.924 Pb.076) Cu (V.59 As.41) O5 H'
_cell_length_a 5.836
_cell_length_b 7.430
_cell_length_c 9.347
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 405.300
_exptl_crystal_density_diffrn      4.230
_symmetry_space_group_name_H-M 'P 21 21 21'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x,1/2+y,1/2-z'
  '1/2+x,1/2-y,-z'
  '1/2-x,-y,1/2+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
Ca   0.98030   0.13140   0.82310   0.92400   0.01127
Pb   0.98030   0.13140   0.82310   0.07600   0.01127
Cu   0.25030   0.24600   0.50050   1.00000   0.00836
V   0.48740   0.88400   0.66730   0.59000   0.00722
As   0.48740   0.88400   0.66730   0.41000   0.00722
O1   0.50370   0.06400   0.55020   1.00000   0.01355
O2   0.43230   0.71050   0.55860   1.00000   0.01811
O3   0.73830   0.86230   0.75830   1.00000   0.01482
O4   0.25840   0.89670   0.77780   1.00000   0.01570
O5   0.99670   0.10870   0.56820   1.00000   0.01077
H5   0.01200   0.00600   0.49900   1.00000 ?