title  Bi2 Sr2 Ca Cu2 O8  (2-2-1-2 structure)
space  F m m m
a=5.411   b=5.418   c=30.89  core=Sr
atom
   Bi     0.0     0.0     0.20       
   Sr     0.0     0.5     0.11       
   Ca     0.0     0.5     0.0       
   Cu     0.0     0.0     0.05       
   O      0.25    0.25    0.05       O1
   O      0.0     0.5     0.20       O2
   O      0.0     0.0     0.13       O3
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