Anisotropic Thermal Expansion of SiO2and AlPO4Clathrasils with the AST-Type Structure
Amri, Mahrez; Clarkson, Guy J.; Walton, Richard I.; The Journal of Physical Chemistry C 114 (2010) 6726–; doi:10.1021/jp100368e

data_1516310
_publ_section_title
;
 Anisotropic Thermal Expansion of SiO2and AlPO4Clathrasils with the
 AST-Type Structure
;
_journal_issue                   14
_journal_name_full               'The Journal of Physical Chemistry C'
_journal_page_first              6726
_journal_paper_doi               10.1021/jp100368e
_journal_volume                  114
_journal_year                    2010
_chemical_formula_sum            'C7 H14 F N O20 Si10'
_chemical_formula_weight         732.09
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           87
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  '-I 4'
_symmetry_space_group_name_H-M   'I 4/m'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.1666(4)
_cell_length_b                   9.1666(4)
_cell_length_c                   13.3662(8)
_cell_measurement_reflns_used    1141
_cell_measurement_temperature    250(2)
_cell_measurement_theta_max      28.89
_cell_measurement_theta_min      3.04
_cell_volume                     1123.12(10)
_computing_cell_refinement       'CrysAlis RED, Oxford Diffraction Ltd'
_computing_data_collection       'CrysAlis CCD, Oxford Diffraction Ltd'
_computing_data_reduction        'CrysAlis RED, Oxford Diffraction Ltd'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 1997)'
_computing_publication_material  'SHELXTL (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      250(2)
_diffrn_detector_area_resol_mean 10.2833
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.890
_diffrn_measurement_device_type  'Oxford Diffraction Gemini R'
_diffrn_measurement_method       '\f & \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Mo) X-ray Source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0207
_diffrn_reflns_av_sigmaI/netI    0.0268
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            1787
_diffrn_reflns_theta_full        27.00
_diffrn_reflns_theta_max         29.04
_diffrn_reflns_theta_min         3.05
_diffrn_standards_decay_%        nil
_exptl_absorpt_coefficient_mu    0.696
_exptl_absorpt_correction_T_max  1.00
_exptl_absorpt_correction_T_min  0.91
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'ABSPACK(CrysAlis, Oxford Diffraction)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    2.165
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             744
_exptl_crystal_size_max          0.1
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.501
_refine_diff_density_min         -0.378
_refine_diff_density_rms         0.096
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.135
_refine_ls_hydrogen_treatment    undef
_refine_ls_matrix_type           full
_refine_ls_number_parameters     60
_refine_ls_number_reflns         701
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      1.140
_refine_ls_R_factor_all          0.0419
_refine_ls_R_factor_gt           0.0350
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0314P)^2^+5.3578P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0886
_refine_ls_wR_factor_ref         0.0910
_reflns_number_gt                602
_reflns_number_total             701
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            SiO2(Q)250.cif
_cod_data_source_block           ma250
_cod_original_sg_symbol_H-M      I4/m
_cod_database_code               1516310