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wsht212(½ð±Ò+3):лл½»Á÷£¬Ï£Íû³£À´£¡ 2010-06-19 13:09:28
rocking5939(½ð±Ò+2): 2010-06-21 09:24:59
rocking5939(½ð±Ò+1): 2010-10-10 08:22:14
Ò×ÅÌÏÂÔØ:
http://www.163pan.com/files/40n000k0w.html
ÎļþÃû³Æ:
        icsd.cif
Îļþ½éÉÜ:
        Bi2SiO5
==============================
data_30995-ICSD
#?2008 by Fachinformationszentrum Karlsruhe, and the U.S. Secretary of
#Commerce on behalf of the United States.  All rights reserved.
_database_code_ICSD                30995
_audit_creation_date               1987/03/16
_audit_update_record               2007/08/01
_chemical_name_systematic
;
Dibismuth Dioxide Catena-silicate - Ht
;
_chemical_formula_structural       'Bi2 O2 (Si O3)'
_chemical_formula_sum              'Bi2 O5 Si1'
_publ_section_title
;
Crystal structure of bismuth silicate Bi2 Si O5
;
loop_
_citation_id
_citation_journal_abbrev
_citation_year
_citation_journal_volume
_citation_page_first
_citation_page_last
_citation_journal_id_ASTM
primary 'Neues Jahrbuch fuer Mineralogie. Monatshefte (Band=Jahr) (1950-)'
1986 1986 13 18 NJMMAW
2 'Phase Transition' 1992 38 127 220 PHTRDP
_publ_author_name                  'Ketterer, J.;Kraemer, V.'
_cell_length_a                     15.173(2)
_cell_length_b                     5.4729(7)
_cell_length_c                     5.3132(7)
_cell_angle_alpha                  90.
_cell_angle_beta                   90.
_cell_angle_gamma                  90.
_cell_volume                       441.21
_cell_formula_units_Z              4
_symmetry_space_group_name_H-M     'C m c 21'
_symmetry_Int_Tables_number        36
_refine_ls_R_factor_all            .052
loop_
_symmetry_equiv_pos_site_id
_symmetry_equiv_pos_as_xyz
  1        'x, -y, z+.5'
  2        '-x, -y, z+.5'
  3        '-x, y, z'
  4        'x, y, z'
  5        'x+.5, -y+.5, z+.5'
  6        '-x+.5, -y+.5, z+.5'
  7        '-x+.5, y+.5, z'
  8        'x+.5, y+.5, z'
loop_
_atom_type_symbol
_atom_type_oxidation_number
Bi3+        3
O2-        -2
Si4+        4
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_symmetry_multiplicity
_atom_site_Wyckoff_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_attached_hydrogens
_atom_site_U_iso_or_equiv
Bi1 Bi3+ 8 b 0.1648(1) 0.2174(1) 0.25 1. 0 0
Si1 Si4+ 4 a 0 0.675(2) 0.200(2) 1. 0 0
O1 O2- 4 a 0 0.522(8) 0.478(9) 1. 0 0.017(7)
O2 O2- 8 b 0.092(2) 0.171(4) 0.689(4) 1. 0 0.018(5)
O3 O2- 8 b 0.251(1) 0.491(5) 0.473(4) 1. 0 0.009(3)

loop_
_atom_site_aniso_label
_atom_site_aniso_type_symbol
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Bi1 Bi3+ 0.0111(3) 0.0107(3) 0.0102(4) 0.0029(2) 0.006(1) -0.002(2)
Si1 Si4+ 0.007(5) 0.012(4) 0.016(8) 0 0 -0.008(3)
#End of data_30995-ICSD
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