Molecular Germanium Selenophosphate Salts: Phase-Change Properties and Strong Second Harmonic Generation
Collin D. Morris; In Chung; Sungoh Park; Connor M. Harrison; Daniel J. Clark; Joon I. Jang; Mercouri G. Kanatzidis; Journal of the American Chemical Society 134 (2012) 20733–20744; doi:10.1021/ja309386e

data_4119042
_publ_section_title
;
 Molecular Germanium Selenophosphate Salts: Phase-Change Properties and
 Strong Second Harmonic Generation
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              20733
_journal_page_last               20744
_journal_paper_doi               10.1021/ja309386e
_journal_volume                  134
_journal_year                    2012
_chemical_formula_moiety         'Ge P4 Se12, 4(Rb)'
_chemical_formula_sum            'Ge P4 Rb4 Se12'
_chemical_formula_weight         1485.87
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           29
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2ac'
_symmetry_space_group_name_H-M   'P c a 21'
_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            4
_cell_length_a                   14.1881(5)
_cell_length_b                   7.3566(3)
_cell_length_c                   24.2914(15)
_cell_measurement_reflns_used    6451
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      29.53
_cell_measurement_theta_min      2.87
_cell_volume                     2535.4(2)
_computing_cell_refinement       'STOE X-AREA'
_computing_data_collection       'STOE X-AREA'
_computing_data_reduction        'STOE X-RED'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 6.67
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'STOE IPDS 2'
_diffrn_measurement_method       'rotation method'
_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  0.0700
_diffrn_reflns_av_sigmaI/netI    0.0898
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       33
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            9700
_diffrn_reflns_theta_full        29.17
_diffrn_reflns_theta_max         29.17
_diffrn_reflns_theta_min         2.87
_exptl_absorpt_coefficient_mu    26.305
_exptl_absorpt_correction_T_max  0.7497
_exptl_absorpt_correction_T_min  0.2085
_exptl_absorpt_correction_type   numerical
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    3.893
_exptl_crystal_description       plate
_exptl_crystal_F_000             2592
_exptl_crystal_size_max          0.2345
_exptl_crystal_size_mid          0.0225
_exptl_crystal_size_min          0.0142
_refine_diff_density_max         1.238
_refine_diff_density_min         -1.081
_refine_diff_density_rms         0.249
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.022(19)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.032
_refine_ls_matrix_type           full
_refine_ls_number_parameters     190
_refine_ls_number_reflns         5645
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.032
_refine_ls_R_factor_all          0.0878
_refine_ls_R_factor_gt           0.0561
_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^)+(0.0133P)^2^+1.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0633
_refine_ls_wR_factor_ref         0.0696
_reflns_number_gt                4230
_reflns_number_total             5645
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja309386e_si_002_5.cif
_cod_data_source_block           rb4gep4se12
_cod_database_code               4119042