data_global _chemical_name_mineral 'Krieselite' loop_ _publ_author_name 'Wunder B' 'Marler B' _journal_name_full 'European Journal of Mineralogy' _journal_volume 9 _journal_year 1997 _journal_page_first 1147 _journal_page_last 1158 _publ_section_title ; Ge-analogues of aluminium silicates: High-pressure synthesis and properties of orthorhombic Al2GeO4(OH)2 Note: Space group setting altered to match standard ; _database_code_amcsd 0006702 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'Al2 Ge O6 H2' _cell_length_a 4.804 _cell_length_b 9.107 _cell_length_c 8.551 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 374.107 _exptl_crystal_density_diffrn 3.987 _symmetry_space_group_name_H-M 'P b n m' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,y,1/2-z' '-x,-y,1/2+z' '1/2+x,1/2-y,1/2+z' '1/2-x,1/2+y,1/2-z' '1/2-x,1/2+y,z' '1/2+x,1/2-y,-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Al -0.09330 0.13350 0.07910 0.00390 Ge 0.40520 -0.06180 0.25000 0.00390 O1 -0.27300 0.03010 0.25000 0.00390 O2 0.06030 0.24720 0.25000 0.00390 O3 0.21260 -0.00420 0.08440 0.00390 O-H 0.58850 0.24830 0.06510 0.00390