{Ge10Si[Si(SiMe3)3]4(SiMe32)Me}-: a Ge10Si framework reveals a structural transition onto elemental germanium.
Schnepf, Andreas; Chemical communications (Cambridge, England)  (2006) 192–194; doi:10.1039/b611165c

data_7101633
_publ_section_title
;
 {Ge10Si[Si(SiMe3)3]4(SiMe32)Me}-: a Ge10Si framework reveals a
 structural transition onto elemental germanium.
;
_journal_issue                   2
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              192
_journal_page_last               194
_journal_paper_doi               10.1039/b611165c
_journal_year                    2006
_chemical_formula_sum            'C64 H173 Ge10 Li O4 Si19'
_chemical_formula_weight         2273.57
_chemical_name_systematic
;
?
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 103.885(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   25.1875(10)
_cell_length_b                   19.9932(5)
_cell_length_c                   47.964(2)
_cell_measurement_reflns_used    55446
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      22.19
_cell_measurement_theta_min      1.25
_cell_volume                     23447.9(15)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.948
_diffrn_measured_fraction_theta_max 0.949
_diffrn_measurement_device_type  'STOE IPDS II'
_diffrn_measurement_method       'image plate detecting system'
_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  0.0742
_diffrn_reflns_av_sigmaI/netI    0.0714
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       -26
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       50
_diffrn_reflns_limit_l_min       -50
_diffrn_reflns_number            38491
_diffrn_reflns_theta_full        22.20
_diffrn_reflns_theta_max         22.20
_diffrn_reflns_theta_min         1.32
_exptl_absorpt_coefficient_mu    2.752
_exptl_absorpt_correction_T_max  0.9580
_exptl_absorpt_correction_T_min  0.3147
_exptl_absorpt_correction_type   numerical
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.288
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             9424
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.626
_refine_diff_density_min         -0.406
_refine_diff_density_rms         0.090
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.021
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     886
_refine_ls_number_reflns         14003
_refine_ls_number_restraints     9
_refine_ls_restrained_S_all      1.021
_refine_ls_R_factor_all          0.0962
_refine_ls_R_factor_gt           0.0556
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0783P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1285
_refine_ls_wR_factor_ref         0.1481
_reflns_number_gt                9159
_reflns_number_total             14003
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b611165c.txt
_cod_data_source_block           as75monc
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7101633