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_2012675
_publ_section_title
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 Copper(II) hypophosphite: the \a- and \b-forms at 270 and 100K, and
 the \g-form at 270K
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_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           51
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2a 2a'
_symmetry_space_group_name_H-M   'P m m a'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   6.6738(6)
_cell_length_b                   5.4133(5)
_cell_length_c                   7.1954(6)
_cell_measurement_reflns_used    24
_cell_measurement_temperature    270(2)
_cell_measurement_theta_max      15
_cell_measurement_theta_min      10
_cell_volume                     259.95(4)
_computing_cell_refinement       'CAD-4 Software'
_computing_data_collection       'CAD-4 Software (Enraf-Nonius, 1989)'
_computing_data_reduction        'CAD-4 Software'
_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      270(2)
_diffrn_measured_fraction_theta_full 0.974
_diffrn_measured_fraction_theta_max 0.974
_diffrn_measurement_device_type  'Enraf-Nonius CAD-4'
_diffrn_measurement_method       2\q/\q
_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  0.0423
_diffrn_reflns_av_sigmaI/netI    0.0457
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -1
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -1
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -1
_diffrn_reflns_number            939
_diffrn_reflns_theta_full        29.09
_diffrn_reflns_theta_max         29.09
_diffrn_reflns_theta_min         2.83
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  60
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    4.718
_exptl_absorpt_correction_T_max  0.6053
_exptl_absorpt_correction_T_min  0.5013
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details   '(XPREP; Siemens, 1995)'
_exptl_crystal_colour            Blue
_exptl_crystal_density_diffrn    2.472
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Needle
_exptl_crystal_F_000             190
_exptl_crystal_size_max          0.52
_exptl_crystal_size_mid          0.03
_exptl_crystal_size_min          0.01
_refine_diff_density_max         0.415
_refine_diff_density_min         -0.513
_refine_ls_extinction_coef       none
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.100
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     27
_refine_ls_number_reflns         405
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.100
_refine_ls_R_factor_all          0.0511
_refine_ls_R_factor_gt           0.0331
_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^)]'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0418
_refine_ls_wR_factor_ref         0.0452
_reflns_number_gt                341
_reflns_number_total             405
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            av1101.cif
_cod_data_source_block           gamma270
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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 'Orthorhombic' changed to
'orthorhombic' 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_database_code               2012675
_cod_database_fobs_code          2012675