Ln2GeB2O8 (Ln = Nd, Sm-Tb): a series of luminescent lanthanide(III) borogermanates with a layered structure.
Zhang, Jian-Han; Li, Pei-Xin; Mao, Jiang-Gao; Dalton transactions (Cambridge, England : 2003) 39 (2010) 5301–5305; doi:10.1039/b927300j

data_7025366
_publ_section_title
;
 Ln2GeB2O8 (Ln = Nd, Sm-Tb): a series of luminescent lanthanide(III)
 borogermanates with a layered structure.
;
_journal_issue                   22
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              5301
_journal_page_last               5305
_journal_paper_doi               10.1039/b927300j
_journal_volume                  39
_journal_year                    2010
_chemical_formula_sum            'B2 Ge O8 Sm2'
_chemical_formula_weight         522.95
_chemical_name_systematic
;
?
;
_space_group_IT_number           60
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2n 2ab'
_symmetry_space_group_name_H-M   'P b c n'
_atom_sites_solution_hydrogens   none
_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                   13.606(6)
_cell_length_b                   4.451(2)
_cell_length_c                   9.367(4)
_cell_measurement_reflns_used    1535
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.4835
_cell_measurement_theta_min      3.7017
_cell_volume                     567.3(4)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  'Mercury70 (2x2 bin mode)'
_diffrn_measurement_method       CCD_Profile_fitting
_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  0.0256
_diffrn_reflns_av_sigmaI/netI    0.0170
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            3875
_diffrn_reflns_theta_full        27.44
_diffrn_reflns_theta_max         27.44
_diffrn_reflns_theta_min         2.99
_exptl_absorpt_coefficient_mu    25.703
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.4723
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    6.123
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       brick
_exptl_crystal_F_000             460
_exptl_crystal_size_max          0.0800
_exptl_crystal_size_mid          0.0500
_exptl_crystal_size_min          0.0500
_refine_diff_density_max         0.936
_refine_diff_density_min         -2.211
_refine_diff_density_rms         0.321
_refine_ls_extinction_coef       0.0160(5)
_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   1.247
_refine_ls_hydrogen_treatment    none
_refine_ls_matrix_type           full
_refine_ls_number_parameters     61
_refine_ls_number_reflns         642
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.247
_refine_ls_R_factor_all          0.0202
_refine_ls_R_factor_gt           0.0195
_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^)+(0.0263P)^2^+0.8316P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0461
_refine_ls_wR_factor_ref         0.0465
_reflns_number_gt                627
_reflns_number_total             642
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b927300j.txt
_cod_data_source_block           Sm2GeB2O8
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_absorpt_correction_type' value 'Multi-scan' changed to
'multi-scan' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_cell_volume        567.2(4)
_cod_original_sg_symbol_H-M      Pbcn
_cod_database_code               7025366