K3(U3O6)(Si2O7) and Rb3(U3O6)(Ge2O7): A Pentavalent-Uranium Silicate and Germanate
Chia-Hui Lin; Chih-Shan Chen; A. A. Shiryaev; Ya. V. Zubavichus; Kwang-Hwa Lii; Inorganic Chemistry 47 (2008) 4445–4447; doi:10.1021/ic800300v

data_4305091
_publ_contact_author
;
Kwang-Hwa Lii
Department of Chemistry
National Central University
Jhongli, Taiwan 320
;
_publ_contact_author_email
;
liikh@cc.ncu.edu.tw
;
_publ_section_title
;
K3(U3O6)(Si2O7) and Rb3(U3O6)(Ge2O7): A Pentavalent-Uranium Silicate and
Germanate
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              4445
_journal_page_last               4447
_journal_paper_doi               10.1021/ic800300v
_journal_volume                  47
_journal_year                    2008
_chemical_formula_moiety         Rb3(U3O6)(Ge2O7)
_chemical_formula_sum            'Ge2 O13 Rb3 U3'
_chemical_formula_weight         1323.68
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           190
_symmetry_space_group_name_Hall  'P -6c -2c'
_symmetry_space_group_name_H-M   'P -6 2 c'
_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                120.00
_cell_formula_units_Z            2
_cell_length_a                   9.8014(3)
_cell_length_b                   9.8014(3)
_cell_length_c                   8.4198(4)
_cell_measurement_temperature    293(2)
_cell_volume                     700.50(5)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0523
_diffrn_reflns_av_sigmaI/netI    0.0263
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            4980
_diffrn_reflns_theta_full        28.28
_diffrn_reflns_theta_max         28.28
_diffrn_reflns_theta_min         2.40
_exptl_absorpt_coefficient_mu    49.217
_exptl_absorpt_correction_T_max  0.967
_exptl_absorpt_correction_T_min  0.382
_exptl_absorpt_correction_type   empirical
_exptl_crystal_colour            'dark red'
_exptl_crystal_density_diffrn    6.276
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    .
_exptl_crystal_description       needle
_exptl_crystal_F_000             1110
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.025
_exptl_crystal_size_min          0.025
_refine_diff_density_max         1.800
_refine_diff_density_min         -1.477
_refine_diff_density_rms         0.333
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.05(3)
_refine_ls_extinction_coef       0.00108(13)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.992
_refine_ls_matrix_type           full
_refine_ls_number_parameters     38
_refine_ls_number_reflns         625
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.992
_refine_ls_R_factor_all          0.0228
_refine_ls_R_factor_gt           0.0214
_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^)+(0.0336P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0528
_refine_ls_wR_factor_ref         0.0532
_reflns_number_gt                582
_reflns_number_total             625
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic800300v-file001_2.cif
_cod_data_source_block           07oc30m
_cod_database_code               4305091