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ºú±ó£¨Àí¹¤£©(ÔÂÖ»À¶´ú·¢): ½ð±Ò+10, ¸ÐлӦÖú 2014-10-14 20:36:51
Toraya, H.; Yamazaki, S.
Simulated annealing structure solution of a new phase of dicalcium silicate Ca~2~SiO~4~ and the mechanism of structural changes from ?-dicalcium silicate hydrate to ?~L~'-dicalcium silicate <i>via</i> the new phase
Acta Crystallographica Section B, 2002, 58, 613-621

#------------------------------------------------------------------------------
#$Date: 2013-12-28 13:58:47 +0000 (Sat, 28 Dec 2013) $
#$Revision: 91933 $
#$URL: file:///home/coder/svn-repositories/cod/cif/2/10/33/2103316.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided by IUCr Journals, http://journals.iucr.org/.
#
# The file may be used within the scientific community so long as
# proper attribution is given to the journal article from which the
# data were obtained.
#
data_2103316
loop_
_publ_author_name
'Toraya, H.'
'Yamazaki, S.'
_publ_section_title
;
Simulated annealing structure solution of a new phase of dicalcium
silicate Ca~2~SiO~4~ and the mechanism of structural changes from
\a-dicalcium silicate hydrate to \a~L~'-dicalcium silicate <i>via</i>
the new phase
;
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              613
_journal_page_last               621
_journal_volume                  58
_journal_year                    2002
_chemical_formula_moiety         'Ca2 Si O4'
_chemical_formula_structural     'Ca2 Si O4'
_chemical_formula_sum            'Ca2 O4 Si'
_chemical_formula_weight         172.24
_chemical_name_common            'dicalcium silicate'
_chemical_name_systematic
;
dicalcium silicate
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_cell_angle_alpha                90.0
_cell_angle_beta                 94.848(5)
_cell_angle_gamma                90.0
_cell_formula_units_Z            8
_cell_length_a                   8.2127(5)
_cell_length_b                   9.7930(4)
_cell_length_c                   9.7954(5)
_cell_measurement_temperature    298
_cell_volume                     785.00(7)
_computing_cell_refinement       WPPF(ver.3.00)
_computing_data_reduction        DATAPRO(ver.2.00)
_computing_molecular_graphics    Ball&Stick
_computing_structure_refinement  PFLS(ver.5.00)
_computing_structure_solution    DSS(ver.1.00)
_diffrn_ambient_temperature      298
_diffrn_measurement_device_type  'MDS, 2-axis, multiple-detector system'
_diffrn_radiation_monochromator  'double-crystal Si(111)'
_diffrn_radiation_type           synchrotron
_diffrn_radiation_wavelength     1.598
_exptl_crystal_density_diffrn    2.91
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             688
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   2.28
_refine_ls_weighting_scheme      1/(Y~i~)
_[local]_cod_data_source_file    ck0012.cif
_[local]_cod_data_source_block   CK0012
_[local]_cod_chemical_formula_sum_orig 'Ca2 Si O4'
_cod_database_code               2103316
loop_
_symmetry_equiv_pos_site_id
_symmetry_equiv_pos_as_xyz
1 x,y,z
2 -x,-y,-z
3 -x,1/2+y,1/2-z
4 x,1/2-y,1/2+z
loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
Ca Ca .341 1.286 'International Tables for Crystallography (Vol. IV)'
Si Si .244 .330 'International Tables for Crystallography (Vol. IV)'
O O .047 .032 'International Tables for Crystallography (Vol. IV)'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_occupancy
Ca1 0.8258(3) 0.4210(2) 0.0729(2) 0.0160 1
Ca2 0.6621(3) 0.4181(2) 0.4121(2) 0.0160 1
Ca3 0.3760(3) 0.2889(2) 0.0816(2) 0.0160 1
Ca4 0.9081(3) 0.0681(2) 0.2068(2) 0.0160 1
Si1 0.0221(4) 0.2959(3) 0.4326(3) 0.0137 1
Si2 0.4618(4) 0.5757(3) 0.2026(3) 0.0137 1
O1 0.8768(7) 0.2993(6) 0.5287(7) 0.0175 1
O2 0.9625(8) 0.3647(5) 0.2856(7) 0.0175 1
O3 0.0641(8) 0.1350(5) 0.4077(7) 0.0175 1
O4 0.1831(7) 0.3873(5) 0.5038(6) 0.0175 1
O5 0.5894(9) 0.4557(5) 0.1682(6) 0.0175 1
O6 0.2903(9) 0.5091(5) 0.1502(6) 0.0175 1
O7 0.4982(7) 0.7130(5) 0.1283(7) 0.0175 1
O8 0.4557(7) 0.5955(5) 0.3702(7) 0.0175 1
_journal_paper_doi 10.1107/S0108768102005189
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2Â¥2014-10-11 16:59:48
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2Â¥: Originally posted by pigrass at 2014-10-11 16:59:48
Toraya, H.; Yamazaki, S.
Simulated annealing structure solution of a new phase of dicalcium silicate Ca~2~SiO~4~ and the mechanism of structural changes from ?-dicalcium silicate hydrate to ?~L~'-di ...

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3Â¥2014-10-12 09:22:48
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