RbCr^III^(C~2~O~4~)~2~·2H~2~O, Cs~2~Mg(C~2~O~4~)~2~·4H~2~O and Rb~2~Cu^II^(C~2~O~4~)~2~·2H~2~O: three new complex oxalate hydrates
Kolitsch, Uwe; Acta Crystallographica Section C 60 (2004) m129–m133; doi:10.1107/S0108270104001945

data_2013842
_publ_section_title
;
 RbCr^III^(C~2~O~4~)~2~&#x00B7;2H~2~O,
 Cs~2~Mg(C~2~O~4~)~2~&#x00B7;4H~2~O and
 Rb~2~Cu^II^(C~2~O~4~)~2~&#x00B7;2H~2~O: three new complex oxalate
 hydrates
;
_journal_issue                   3
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              m129
_journal_page_last               m133
_journal_paper_doi               10.1107/S0108270104001945
_journal_volume                  60
_journal_year                    2004
_chemical_formula_iupac          '[Rb Cr (C2 O4)2 (H2 O)2]'
_chemical_formula_moiety         'C4 H4 Cr O10 Rb'
_chemical_formula_sum            'C4 H4 Cr O10 Rb'
_chemical_formula_weight         349.54
_chemical_name_common            'Rubidium chromium(III) oxalate dihydrate'
_chemical_name_systematic
;
Diaquabis(\m-oxalato)chromium(III)rubidium(I)
;
_space_group_IT_number           12
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2y'
_symmetry_space_group_name_H-M   'C 1 2/m 1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90
_cell_angle_beta                 92.46(3)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   6.6390(10)
_cell_length_b                   7.3130(10)
_cell_length_c                   10.078(2)
_cell_measurement_reflns_used    752
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      30.03
_cell_measurement_theta_min      2.04
_cell_volume                     488.85(14)
_computing_cell_refinement       'HKL SCALEPACK (Otwinowski & Minor 1997)'
_computing_data_collection       'COLLECT (Nonius, 2002)'
_computing_data_reduction
'HKL DENZO (Otwinowski & Minor, 1997) and SCALEPACK'
_computing_molecular_graphics
'ATOMS (Dowty, 1999) and ORTEP-3 for Windows (Farrugia, 1997)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Nonius KappaCCD area-detector'
_diffrn_measurement_method       '\y and \w'
_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  0.0120
_diffrn_reflns_av_sigmaI/netI    0.0175
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            1410
_diffrn_reflns_theta_full        30.05
_diffrn_reflns_theta_max         30.05
_diffrn_reflns_theta_min         4.05
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    6.159
_exptl_absorpt_correction_T_max  0.837
_exptl_absorpt_correction_T_min  0.372
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(HKL SCALEPACK; Otwinowski & Minor, 1997)'
_exptl_crystal_colour            pink
_exptl_crystal_density_diffrn    2.375
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             338
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.429
_refine_diff_density_min         -0.955
_refine_ls_extinction_coef       0.022(2)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL97 (Sheldrick, 1997)'
_refine_ls_goodness_of_fit_ref   1.122
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     47
_refine_ls_number_reflns         759
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.122
_refine_ls_R_factor_all          0.0239
_refine_ls_R_factor_gt           0.0217
_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^)+(0.036P)^2^+0.23P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0583
_refine_ls_wR_factor_ref         0.0602
_reflns_number_gt                708
_reflns_number_total             759
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sk1664.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      'C 2/m'
_cod_database_code               2013842
_cod_database_fobs_code          2013842