# CIF file 

data_findsym-output
_audit_creation_method FINDSYM

_chemical_name_mineral 'low (alpha) Cristobalite'
_chemical_formula_sum 'Si O2'
 
loop_
_publ_author_name
 'J. J. Pluth'
 'J. V. Smith'
 'J. Faber, Jr.'
_journal_name_full
;
Journal of Applied Physics
;
_journal_volume 57
_journal_year 1985
_journal_page_first 1045
_journal_page_last 1049
_publ_Section_title
;
 Crystal structure of low cristobalite at 10, 293, and 473 K: Variation of framework geometry with temperature
;

# Found in  Pearson's Handbook, Vol. IV, pp. 4759

_aflow_proto 'A2B_tP12_92_b_a' 
_aflow_params 'a,c/a,x1,x2,y2,z2' 
_aflow_params_values '4.957,1.39001412144,0.3047,0.2381,0.1109,0.1826' 
_aflow_Strukturbericht 'None' 
_aflow_Pearson 'tP12' 

_symmetry_space_group_name_Hall "P 4abw 2nw"
_symmetry_space_group_name_H-M "P 41 21 2"
_symmetry_Int_Tables_number 92

_cell_length_a    4.95700
_cell_length_b    4.95700
_cell_length_c    6.89030
_cell_angle_alpha 90.00000
_cell_angle_beta  90.00000
_cell_angle_gamma 90.00000
 
loop_
_space_group_symop_id
_space_group_symop_operation_xyz
1 x,y,z
2 x+1/2,-y+1/2,-z+3/4
3 -x+1/2,y+1/2,-z+1/4
4 -x,-y,z+1/2
5 -y,-x,-z+1/2
6 -y+1/2,x+1/2,z+1/4
7 y+1/2,-x+1/2,z+3/4
8 y,x,-z
 
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_symmetry_multiplicity
_atom_site_Wyckoff_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Si1 Si   4 a 0.30470 0.30470 0.00000 1.00000
O1  O    8 b 0.23810 0.11090 0.18260 1.00000
