What is the notion when the crystal structure is tetragonal and the formula is bi 2 sr 2 cacu 2 o 8
create table table_101336_1 (notation varchar, crystal_structure varchar, formula varchar, PRIMARY KEY (notation))
select notation from table_101336_1 where crystal_structure = "tetragonal" and formula = "bi 2 sr 2 cacu 2 o 8"