Copper(II) hypophosphite: the α- and β-forms at 270 and 100K, and the γ-form at 270K
Naumov, Dmitry Yu.; Naumova, Marina I.; Kuratieva, Natalia V.; Boldyreva, Elena V.; Howard, Judith A. K.; Acta Crystallographica Section C 58 (2002) i55–i60; doi:10.1107/S0108270102005176

data_2012672
_publ_section_title
;
 Copper(II) hypophosphite: the \a- and \b-forms at 270 and 100K, and
 the \g-form at 270K
;
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              i55
_journal_page_last               i60
_journal_paper_doi               10.1107/S0108270102005176
_journal_volume                  58
_journal_year                    2002
_chemical_formula_iupac          'Cu (H2 P O2)2'
_chemical_formula_moiety         'Cu 2+, 2H2 O2 P 1-'
_chemical_formula_structural     'Cu (H2 P O2)2'
_chemical_formula_sum            'Cu H4 O4 P2'
_chemical_formula_weight         193.51
_chemical_name_common            'Copper(II) Hypophosphite'
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 98.709(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   7.2079(3)
_cell_length_b                   5.32160(10)
_cell_length_c                   6.2121(2)
_cell_measurement_reflns_used    1117
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      29.05
_cell_measurement_theta_min      2.86
_cell_volume                     235.534(13)
_computing_cell_refinement       'SAINT (Siemens, 1994)'
_computing_data_collection       'SMART (Siemens, 1994)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'SHELXTL (Siemens, 1994)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.192
_diffrn_measured_fraction_theta_full 0.970
_diffrn_measured_fraction_theta_max 0.970
_diffrn_measurement_device_type  'Siemens SMART CCD'
_diffrn_measurement_method       \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  0.0334
_diffrn_reflns_av_sigmaI/netI    0.0297
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            1689
_diffrn_reflns_theta_full        29.05
_diffrn_reflns_theta_max         29.05
_diffrn_reflns_theta_min         2.86
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    5.207
_exptl_absorpt_correction_T_max  0.8574
_exptl_absorpt_correction_T_min  0.5181
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details   '(XPREP; Siemens, 1995)'
_exptl_crystal_colour            Blue
_exptl_crystal_density_diffrn    2.729
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prism
_exptl_crystal_F_000             190
_exptl_crystal_size_max          0.19
_exptl_crystal_size_mid          0.11
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.469
_refine_diff_density_min         -0.421
_refine_ls_extinction_coef       0.022(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL97
_refine_ls_goodness_of_fit_ref   1.179
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     43
_refine_ls_number_reflns         612
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.179
_refine_ls_R_factor_all          0.0297
_refine_ls_R_factor_gt           0.0269
_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^)+(0.0249P)^2^+0.3031P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0611
_refine_ls_wR_factor_ref         0.0622
_reflns_number_gt                575
_reflns_number_total             612
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            av1101.cif
_cod_data_source_block           alpha100
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2012672
_cod_database_fobs_code          2012672