A precise structure redetermination of nickel ammonium sulfate hexahydrate, Ni(H~2~O)~6~.2NH~4~.2SO~4~
Tahirov, T.H.; Lu, T.-H.; Huang, C.-C.; Chung, C.-S.; Acta Crystallographica Section C 50 (1994) 668–669; doi:10.1107/S0108270193010492

data_2009678
_publ_section_title
;
 A precise structure redetermination of nickel ammonium sulfate
 hexahydrate, Ni(H~2~O)~6~.2NH~4~.2SO~4~
;
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              668
_journal_page_last               669
_journal_paper_doi               10.1107/S0108270193010492
_journal_volume                  50
_journal_year                    1994
_chemical_formula_sum            'H20 N2 Ni O14 S2'
_chemical_formula_weight         394.99
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_type_scat_source           IntTabIV
_cell_angle_alpha                90.
_cell_angle_beta                 106.98(3)
_cell_angle_gamma                90.
_cell_formula_units_Z            2
_cell_length_a                   6.244(2)
_cell_length_b                   12.469(4)
_cell_length_c                   9.195(3)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    298(3)
_cell_measurement_theta_max      17.5
_cell_measurement_theta_min      9.5
_cell_volume                     684.7(4)
_diffrn_measurement_device       'Nicolet R3m/V'
_diffrn_measurement_method       \q/2\q
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.7093
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            1496
_diffrn_reflns_theta_max         25
_diffrn_standards_decay_%        +-0.5
_diffrn_standards_interval_time  60
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    1.81
_exptl_absorpt_correction_T_max  1
_exptl_absorpt_correction_T_min  0.6301
_exptl_absorpt_correction_type   'empirical (North, Phillips & Mathews, 1968)'
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.916
_exptl_crystal_description       parallelepiped
_exptl_crystal_size_max          0.33
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.93
_refine_diff_density_min         -0.42
_refine_ls_extinction_coef       '1.1 (1) (length in mm)'
_refine_ls_extinction_method     'Zachariasen (1968)'
_refine_ls_goodness_of_fit_obs   1.21
_refine_ls_hydrogen_treatment    noref
_refine_ls_number_parameters     89
_refine_ls_number_reflns         1269
_refine_ls_R_factor_obs          0.029
_refine_ls_shift/esd_max         0.001
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details     'w = 1/[\s(F~o~)^2^ + 0.001(F~o~)^2^]'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_obs         0.044
_reflns_number_observed          1269
_reflns_number_total             1496
_reflns_observed_criterion       I>=\s(I)
_cod_data_source_file            as1068.cif
_cod_data_source_block           as1068_structure_1_of_1
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value '1/[\s(F~o~)^2^ +
0.001(F~o~)^2^]' was changed to 'calc'. New tag
'_refine_ls_weighting_details' was created. The value of the new tag
was set to 'w = 1/[\s(F~o~)^2^ + 0.001(F~o~)^2^]'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2009678