Paramelaconite
O'Keeffe M, Bovin J O
American Mineralogist 63 (1978) 180-185
The crystal structure of paramelaconite, Cu4O3
_database_code_amcsd 0000614
5.837 5.837 9.932 90 90 90 *I4_1/amd
0 -.25 .125
atom x   y     z Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3)
Cu1  0   0     0       .0066  .0093  .0021      0      0 -.0023
Cu2  0   0    .5       .0055  .0038  .0003      0      0  .0001
O1   0 .25 .1173  0.8
O2   0 .25  .375  0.7