data_9009234
_publ_section_title
;
 Rietveld refinement of the kaolinite structure at 1.5 K
 Note: sample at T = 1.5 K
 Locality: Keokuk, Iowa, USA
;
_journal_name_full               'Clays and Clay Minerals'
_journal_page_first              738
_journal_page_last               744
_journal_paper_doi               10.1346/CCMN.1993.0410613
_journal_volume                  41
_journal_year                    1993
_chemical_formula_sum            'Al2 H4 O9 Si2'
_chemical_name_mineral           Kaolinite
_space_group_IT_number           1
_symmetry_space_group_name_Hall  'P 1 (1/2*x+1/2*y,1/2*x-1/2*y,-z)'
_symmetry_space_group_name_H-M   'C 1'
_cell_angle_alpha                91.926
_cell_angle_beta                 105.046
_cell_angle_gamma                89.797
_cell_length_a                   5.1535
_cell_length_b                   8.9419
_cell_length_c                   7.3906
_cell_volume                     328.708
_diffrn_ambient_temperature      1.5
_exptl_crystal_density_diffrn    2.608
_[local]_cod_chemical_formula_sum_orig 'Al2 Si2 O9 H4'
_cod_database_code               9009234
loop_
_symmetry_equiv_pos_as_xyz
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_U_iso_or_equiv
Al1 0.28900 0.49660 0.46600 0.04000
Al2 0.79300 0.32880 0.46500 0.04000
Si1 0.98900 0.33950 0.09060 0.04200
Si2 0.50700 0.16650 0.09380 0.04200
O1 0.04900 0.34820 0.31680 0.04400
O2 0.11300 0.65990 0.31880 0.04400
O3 0.00000 0.50000 0.00000 0.04400
O4 0.20400 0.22910 0.03000 0.04400
O5 0.19700 0.76410 0.00100 0.04400
O-h1 0.05000 0.97100 0.32500 0.03900
O-h2 0.96000 0.16580 0.60700 0.03900
O-h3 0.03700 0.47260 0.60460 0.03900
O-h4 0.03800 0.85820 0.60900 0.03900
H1 0.14500 0.06510 0.32600 0.07300
H2 0.06300 0.16380 0.73900 0.04700
H3 0.03600 0.50570 0.73200 0.05600
H4 0.53400 0.31540 0.72800 0.04900
