data_global
_chemical_name_mineral 'Argandite'
loop_
_publ_author_name
'Brugger J'
'Elliott P'
'Meisser N'
'Ansermet S'
_journal_name_full 'American Mineralogist'
_journal_volume 96 
_journal_year 2011
_journal_page_first 1894
_journal_page_last 1900
_publ_section_title
;
 Argandite, Mn7(VO4)2(OH)8, the V analogue of allactite from the metamorphosed
 Mn ores at Pipji, Turtmann Valley, Switzerland
;
_database_code_amcsd 0018517
_chemical_compound_source 'Pipji, Turtmann Valley, Switzerland'
_chemical_formula_sum 'Mn6.72 (V1.46 As.54) O16 H8'
_cell_length_a 5.5038
_cell_length_b 12.2665
_cell_length_c 10.1055
_cell_angle_alpha 90
_cell_angle_beta 95.559
_cell_angle_gamma 90
_cell_volume 679.038
_exptl_crystal_density_diffrn      3.659
_symmetry_space_group_name_H-M 'P 1 21/n 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2-y,1/2+z'
  '1/2-x,1/2+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_occupancy
_atom_site_U_iso_or_equiv
Mn1   0.00000   0.50000   0.50000   1.00000   0.01050
Mn2   0.23235   0.17921   0.79338   1.00000   0.01200
Mn3   0.74927   0.56820   0.99173   0.92000   0.00950
Mn4   0.24910   0.20769   0.50088   0.94000   0.01030
V   0.53430   0.42008   0.70834   0.73000   0.00790
As   0.53430   0.42008   0.70834   0.27000   0.00790
O2   0.56170   0.42947   0.88170   1.00000   0.01260
O-h1   0.05350   0.30600   0.88750   1.00000   0.01380
O-h3   0.07840   0.34490   0.40600   1.00000   0.01560
O4   0.41590   0.29650   0.66770   1.00000   0.01770
O-h5   0.07490   0.56120   0.88700   1.00000   0.01520
O-h6   0.54330   0.68240   0.87240   1.00000   0.01510
O7   0.34960   0.52030   0.63750   1.00000   0.01540
O8   0.82050   0.42730   0.66160   1.00000   0.01820
H1   0.01300   0.34700   0.80700   1.00000   0.05300
H3   0.19300   0.36100   0.34200   1.00000   0.05300
H5   0.05600   0.52700   0.80100   1.00000   0.05300
H6   0.64000   0.74600   0.86400   1.00000   0.05300
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Mn1 0.01170 0.00980 0.00980 -0.00100 0.00030 -0.00160
Mn2 0.01120 0.01190 0.01240 0.00190 -0.00190 -0.00080
Mn3 0.00720 0.00940 0.01160 -0.00020 -0.00030 0.00010
Mn4 0.01000 0.01040 0.01050 -0.00120 0.00060 0.00000
V 0.00740 0.00820 0.00780 0.00040 -0.00020 -0.00010
As 0.00740 0.00820 0.00780 0.00040 -0.00020 -0.00010
O2 0.01040 0.01430 0.01260 0.00040 -0.00140 -0.00020
O-h1 0.01390 0.01490 0.01260 0.00080 0.00080 -0.00050
O-h3 0.01280 0.01560 0.01830 -0.00070 0.00090 0.00050
O4 0.02320 0.01350 0.01560 -0.00160 -0.00210 -0.00460
O-h5 0.01230 0.01380 0.01920 -0.00110 0.00080 0.00040
O-h6 0.01390 0.01570 0.01580 0.00280 0.00180 -0.00170
O7 0.01620 0.01270 0.01650 0.00260 -0.00250 0.00290
O8 0.01350 0.02700 0.01420 0.00480 0.00160 0.00170