Bradaczekite Krivovichev S V, Filatov S K, Burns P C Zapiski Vserossijskogo Mineralogicheskogo Obshchestva 2001 (2001) 1-8 The Jahn-Teller distortion of copper coordination polyhedra in the alluaudite structural type: Crystal structure of bradaczekite, NaCu4(AsO4)3 _database_code_amcsd 0015718 12.053 12.432 7.2529 90 117.793 90 C2/c atom x y z Uiso Na 0 .4924 .25 .0209 Cu1 0 .00439 .25 .0099 Cu2 .78021 .34367 .86019 .0108 Cu3 0 .76511 .25 .0140 As1 .22752 .38288 .12152 .0071 As2 0 .22278 .25 .0076 O1 .1672 .5053 .1180 .0128 O2 .8970 .1230 .2418 .0107 O3 .3819 .3893 .1763 .0136 O4 .2212 .3075 .3080 .0106 O5 .1456 .3328 .8786 .0108 O6 -.0430 .2971 .0365 .0144