data_global _chemical_name_mineral 'Ardennite-(As)' loop_ _publ_author_name 'Nagashima M' 'Armbruster T' _journal_name_full 'Mineralogical Magazine' _journal_volume 74 _journal_year 2010 _journal_page_first 55 _journal_page_last 71 _publ_section_title ; Ardennite, tiragalloite and medaite: structural control of (As5+,V5+,Si4+)O4 tetrahedra in silicates ; _database_code_amcsd 0019901 _chemical_compound_source 'Vernetto mine, Val Lanzo, Torino, Piedmont, Italy' _chemical_formula_sum 'Mn3.102 Ca1.26 Al4.314 Fe.244 Mg1.08 Si5.27 As.73 O28 H6' _cell_length_a 8.7452 _cell_length_b 5.8314 _cell_length_c 18.5891 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 947.984 _exptl_crystal_density_diffrn 3.622 _symmetry_space_group_name_H-M 'P n m m' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,y,1/2-z' '-x,-y,1/2+z' 'x,1/2-y,z' '-x,1/2+y,-z' '-x,1/2+y,1/2+z' '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 MnA1 0.94617 0.25000 0.15546 0.57000 0.01326 CaA1 0.94617 0.25000 0.15546 0.43000 0.01326 MnA2 0.39662 0.75000 0.15995 0.80000 0.01241 CaA2 0.39662 0.75000 0.15995 0.20000 0.01241 AlM1 0.00000 0.00000 0.00000 0.87800 0.00800 FeM1 0.00000 0.00000 0.00000 0.12200 0.00800 AlM2 0.50000 0.00000 0.00000 1.00000 0.00810 MgM3 0.68069 -0.00158 0.25000 0.54000 0.00860 AlM3 0.68069 -0.00158 0.25000 0.27900 0.00860 MnM3 0.68069 -0.00158 0.25000 0.18100 0.00860 SiT1 0.76328 0.75000 0.09619 1.00000 0.00791 SiT2 0.27823 0.25000 0.09517 1.00000 0.00858 SiT3 0.34387 0.25000 0.25000 1.00000 0.00900 AsT4 0.04264 0.75000 0.25000 0.73000 0.00988 SiT4 0.04264 0.75000 0.25000 0.27000 0.00988 O1 0.13036 0.02630 -0.08177 1.00000 0.01030 O2 0.62384 -0.01930 -0.08283 1.00000 0.01020 O3 0.11130 0.25000 0.05398 1.00000 0.01240 O4 0.61630 0.75000 0.04145 1.00000 0.01020 O5 0.92870 -0.01170 0.25000 1.00000 0.01550 O6 0.44350 0.01220 0.25000 1.00000 0.01280 O7 0.67950 0.75000 0.17642 1.00000 0.01300 O8 0.22580 0.25000 0.18087 1.00000 0.01150 O9 0.15020 0.75000 0.17743 1.00000 0.01620 O10 0.11180 0.75000 0.03336 1.00000 0.01050 O11 0.61390 0.25000 0.03572 1.00000 0.01000 O12 0.69790 0.25000 0.18221 1.00000 0.01260 H10 0.12300 0.75000 0.08570 1.00000 0.05000 H11 0.71500 0.25000 0.01400 1.00000 0.05000 H12 0.65700 0.25000 0.13320 1.00000 0.05000 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 MnA1 0.01670 0.00980 0.01330 0.00000 0.00391 0.00000 CaA1 0.01670 0.00980 0.01330 0.00000 0.00391 0.00000 MnA2 0.01720 0.00790 0.01210 0.00000 -0.00152 0.00000 CaA2 0.01720 0.00790 0.01210 0.00000 -0.00152 0.00000 AlM1 0.00840 0.00580 0.00970 0.00030 0.00080 0.00000 FeM1 0.00840 0.00580 0.00970 0.00030 0.00080 0.00000 AlM2 0.00880 0.00580 0.00970 -0.00030 0.00030 -0.00040 MgM3 0.01090 0.00540 0.00960 -0.00020 0.00000 0.00000 AlM3 0.01090 0.00540 0.00960 -0.00020 0.00000 0.00000 MnM3 0.01090 0.00540 0.00960 -0.00020 0.00000 0.00000 SiT1 0.00750 0.00700 0.00930 0.00000 0.00000 0.00000 SiT2 0.00850 0.00710 0.01020 0.00000 -0.00020 0.00000 SiT3 0.01090 0.00580 0.01020 0.00000 0.00000 0.00000 AsT4 0.01150 0.00570 0.01240 0.00000 0.00000 0.00000 SiT4 0.01150 0.00570 0.01240 0.00000 0.00000 0.00000 O1 0.01090 0.00710 0.01290 -0.00100 0.00150 -0.00110 O2 0.01070 0.00730 0.01250 0.00050 0.00160 0.00010 O3 0.01010 0.01480 0.01250 0.00000 -0.00120 0.00000 O4 0.00990 0.00790 0.01280 0.00000 -0.00170 0.00000 O5 0.01450 0.00890 0.02310 0.00330 0.00000 0.00000 O6 0.01620 0.00680 0.01550 0.00250 0.00000 0.00000 O7 0.01240 0.01450 0.01200 0.00000 0.00220 0.00000 O8 0.01230 0.01220 0.00990 0.00000 0.00070 0.00000 O9 0.01690 0.01630 0.01530 0.00000 0.00040 0.00000 O10 0.00820 0.01060 0.01260 0.00000 -0.00070 0.00000 O11 0.00810 0.00900 0.01280 0.00000 0.00060 0.00000 O12 0.01270 0.01380 0.01140 0.00000 0.00100 0.00000