data_9000390
_chemical_name 'Ussingite'
loop_
_publ_author_name
'Rossi G'
'Tazzoli V'
'Ungaretti L'
_journal_name_full "American Mineralogist"
_journal_volume 59
_journal_year 1974
_journal_page_first 335
_journal_page_last 340
_publ_section_title
;
 The crystal structure of ussingite
;
_chemical_formula_sum 'Al Si3 Na2 H O9'
_cell_length_a 7.256
_cell_length_b 7.686
_cell_length_c 8.683
_cell_angle_alpha 90.75
_cell_angle_beta 99.75
_cell_angle_gamma 122.48
_cell_volume 399.436
_symmetry_space_group_name_H-M 'P -1'
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Al   0.24220   0.04570   0.85510
Si1   0.24630   0.19350   0.36260
Si2   0.32030   0.41470   0.69240
Si3   0.70140   0.10410   0.81290
Na1   0.17590   0.39240   0.05550
Na2   0.82140   0.23420   0.44210
H   0.97900   0.40500   0.76500
O1   0.00210   0.13580   0.27920
O2   0.14190   0.47490   0.65150
O3   0.27670  -0.00210   0.34730
O4   0.30100   0.29700   0.84890
O5   0.44420   0.02240   0.79550
O6   0.42310   0.38180   0.27680
O7   0.79800   0.03440   0.96250
O8   0.85800   0.35570   0.82100
O9   0.29730   0.26040   0.54850