Cr0.15 Cu2 N0.5 O10 Sr4 Tl0.85 Barnabe A, Letouze F, Pelloquin D, Maignan A, Hervieu M, Raveau B Chemistry of Materials 9 (1997) 2205-2211 A new superconducting oxycarbonitrate: (Tl5/6Cr1/6)Sr4Cu2(CO3)1/2(NO3)1/2O7 _cod_database_code 1001789 _database_code_amcsd 0012212 3.8320 3.8320 16.41119 90 90 90 P4/mmm atom x y z occ Tl1 .102 0 0 .2125 Cr1 .102 0 0 .0375 Sr1 .5 .5 .1592 Sr2 .5 .5 .3723 Cu1 0 0 .2630 C1 0 0 .5 .5 N1 0 0 .5 .5 O1 .5 .5 0 O2 0 0 .1226 O3 .141 0 .4306 .25 O4 .332 0 .5 .25 O5 .5 0 .2719