data_9000094
_publ_section_title
;
 The crystal structure of cahnite, Ca2BAsO4(OH)4
;
_journal_name_full               'American Mineralogist'
_journal_page_first              1077
_journal_page_last               1085
_journal_volume                  46
_journal_year                    1961
_chemical_formula_sum            'As B Ca2 O8'
_chemical_name_mineral           Cahnite
_space_group_IT_number           82
_symmetry_space_group_name_Hall  'I -4'
_symmetry_space_group_name_H-M   'I -4'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_length_a                   7.11
_cell_length_b                   7.11
_cell_length_c                   6.20
_cell_volume                     313.423
_exptl_crystal_density_diffrn    3.114
_cod_database_code               9000094
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
1/2+x,1/2+y,1/2+z
y,-x,-z
1/2+y,1/2-x,1/2-z
-x,-y,z
1/2-x,1/2-y,1/2+z
-y,x,-z
1/2-y,1/2+x,1/2-z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
As 0.00000 0.00000 0.00000
B 0.00000 0.50000 0.25000
Ca1 0.00000 0.00000 0.50000
Ca2 0.00000 0.50000 0.75000
O1 0.17800 0.05400 0.16700
O2 0.16000 0.44400 0.11400
