Claudetite
Frueh A J
American Mineralogist 36 (1951) 833-850
The crystal structure of claudetite (monoclinic As2O3)
_database_code_amcsd 0000053
5.25 12.87 4.54 90 93.82 90 P2_1/n
atom    x    y    z
As1  .258 .102 .040
As2  .363 .352 .007
O1   .450 .220 .030
O2   .620 .410 .180
O3   .950 .160 .130