data_9005754
_chemical_name 'Cronstedtite'
loop_
_publ_author_name
'Hybler J'
_journal_name_full "European Journal of Mineralogy"
_journal_volume 18
_journal_year 2006
_journal_page_first 197
_journal_page_last 205
_publ_section_title
;
 Parallel intergrowths in cronstedtite-1T:
 determination of the degree of disorder
 Locality: Roznava, Slovakia
 Sample: ROZ
 Note: 1T polytype
;
_chemical_formula_sum 'Fe3.44 Si1.56 O9 H4'
_cell_length_a 5.501
_cell_length_b 5.501
_cell_length_c 7.106
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 186.225
_symmetry_space_group_name_H-M 'P 3 1 m'
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  'x-y,-y,z'
  '-y,x-y,z'
  'y,x,z'
  '-x+y,-x,z'
  '-x,-x+y,z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_Uiso_or_equiv
FeM1   0.66540   0.00000   0.50000   1.00000   0.01110
SiT1   0.33333   0.66667   0.10290   0.78000   0.01260
FeT1   0.33333   0.66667   0.10290   0.22000   0.01260
O1   0.44800   0.00000   0.02600   1.00000   0.03900
O-h1   0.00000   0.00000   0.35300   1.00000   0.01700
O-h2   0.33300   0.00000   0.64100   1.00000   0.01600
O4   0.33333   0.66667   0.34900   1.00000   0.01800
H1   0.00000   0.00000   0.20500   1.00000   0.03800
H2   0.33200   0.00000   0.75500   1.00000   0.03800