HgBa2CaCu2O6+delta Finger L W, Hazen R M, Downs R T, Meng R L, Chu C W Physica C 226 (1994) 216-221 Crystal chemistry of HgBa2CaCu2O8+d and HgBa2Ca2Cu3O8+d Single-crystal X-ray diffraction results Sample: Hg-1212 superconductor _database_code_amcsd 0015065 3.8564 3.8564 12.682 90 90 90 P4/mmm atom x y z occ Biso Hg 0 0 0 .87 1.15 Cu 0 0 0 .13 1.15 Ba .5 .5 .2205 .65 Ca .5 .5 .5 .49 Cu 0 0 .3765 .46 O1 0 .5 .3758 .4 O2 0 0 .1553 1.0 O3 .5 .40 0 .10 .8 O4 .5 0 0 .12 .8