Synthesis, crystal structure, magnetic and luminescence properties of KEuGe2O6: a europium cyclogermanate containing infinite chains of edge-sharing Eu‒O polyhedra
Chen, Pei-Lin; Chiang, Pei-Yun; Yeh, Han-Ching; Chang, Bor-Chen; Lii, Kwang-Hwa; Dalton Transactions  (2008) 1721–1726; doi:10.1039/b716654k

data_7003489
_publ_section_title
;
 Synthesis, crystal structure, magnetic and luminescence properties of
 KEuGe2O6: a europium cyclogermanate containing infinite chains of
 edge-sharing Eu--O polyhedra
;
_journal_issue                   13
_journal_name_full               'Dalton Transactions'
_journal_page_first              1721
_journal_page_last               1726
_journal_paper_doi               10.1039/b716654k
_journal_year                    2008
_chemical_formula_sum            'Eu Ge2 K O6'
_chemical_formula_weight         432.24
_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_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 102.8610(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            12
_cell_length_a                   8.6908(4)
_cell_length_b                   10.8647(6)
_cell_length_c                   19.2607(10)
_cell_measurement_reflns_used    3801
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25
_cell_measurement_theta_min      2.5
_cell_volume                     1773.03(16)
_computing_cell_refinement       'Bruker Smart'
_computing_data_collection       'Bruker Smart'
_computing_data_reduction        'Bruker Saint'
_computing_molecular_graphics    Diamond
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_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  0.0329
_diffrn_reflns_av_sigmaI/netI    0.0322
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            6466
_diffrn_reflns_theta_full        28.31
_diffrn_reflns_theta_max         28.31
_diffrn_reflns_theta_min         2.17
_exptl_absorpt_coefficient_mu    21.255
_exptl_absorpt_correction_T_max  0.96204
_exptl_absorpt_correction_T_min  0.41654
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SADABS program'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    4.858
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    .
_exptl_crystal_description       lamellar
_exptl_crystal_F_000             2328
_exptl_crystal_size_max          0.1
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.938
_refine_diff_density_min         -1.427
_refine_diff_density_rms         0.307
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.988
_refine_ls_matrix_type           full
_refine_ls_number_parameters     137
_refine_ls_number_reflns         2215
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.988
_refine_ls_R_factor_all          0.0229
_refine_ls_R_factor_gt           0.0194
_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^)+(0.0167P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0391
_refine_ls_wR_factor_ref         0.0399
_reflns_number_gt                1996
_reflns_number_total             2215
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b716654k.txt
_cod_data_source_block           07oc11m
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7003489