data_9000603
_publ_section_title
;
 The crystal structure of paramelaconite, Cu4O3
;
_journal_name_full               'American Mineralogist'
_journal_page_first              180
_journal_page_last               185
_journal_volume                  63
_journal_year                    1978
_chemical_formula_sum            'Cu4 O3'
_chemical_name_mineral           Paramelaconite
_space_group_IT_number           141
_symmetry_space_group_name_Hall  '-I 4bd 2'
_symmetry_space_group_name_H-M   'I 41/a m d :2'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_length_a                   5.837
_cell_length_b                   5.837
_cell_length_c                   9.932
_cell_volume                     338.389
_exptl_crystal_density_diffrn    5.931
_[local]_cod_cif_authors_sg_H-M  'I 41/a m d'
_cod_database_code               9000603
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
1/2+x,1/2+y,1/2+z
1/4-y,3/4-x,1/4+z
3/4-y,1/4-x,3/4+z
1/4+y,3/4+x,1/4-z
3/4+y,1/4+x,3/4-z
1/4+y,3/4-x,1/4-z
3/4+y,1/4-x,3/4-z
1/4-y,3/4+x,1/4+z
3/4-y,1/4+x,3/4+z
1/2+x,-y,1/2+z
+x,1/2-y,+z
1/2-x,y,1/2-z
-x,1/2+y,-z
1/2+x,y,1/2-z
+x,1/2+y,-z
1/2-x,-y,1/2+z
-x,1/2-y,+z
1/4+y,1/4+x,3/4+z
3/4+y,3/4+x,1/4+z
1/4-y,1/4-x,3/4-z
3/4-y,3/4-x,1/4-z
1/4-y,1/4+x,3/4-z
3/4-y,3/4+x,1/4-z
1/4+y,1/4-x,3/4+z
3/4+y,3/4-x,1/4+z
-x,y,z
1/2-x,1/2+y,1/2+z
x,-y,-z
1/2+x,1/2-y,1/2-z
-x,-y,-z
1/2-x,1/2-y,1/2-z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Cu1 0.00000 0.00000 0.00000 ?
Cu2 0.00000 0.00000 0.50000 ?
O1 0.00000 0.25000 0.11730 0.01013
O2 0.00000 0.25000 0.37500 0.00887
