Question: What is the notion when the crystal structure is Tetragonal and the formula is Bi 2 Sr 2 CaCu 2 O 8
SQL: SELECT "Notation" FROM "1-101336-1" WHERE "Crystal structure" = 'Tetragonal' AND "Formula" = 'Bi 2 Sr 2 CaCu 2 O 8';

Question: How many times is the formula Tl 2 Ba 2 CuO 6?
SQL: SELECT "No. of Cu-O planes in unit cell" FROM "1-101336-1" WHERE "Formula" = 'Tl 2 Ba 2 CuO 6';

Question: What is the crystal structure for the formula YBa 2 Cu 3 O 7?
SQL: SELECT "Crystal structure" FROM "1-101336-1" WHERE "Formula" = 'YBa 2 Cu 3 O 7';

Question: What is the number for t c (k) when the notation is Tl-2212?
SQL: SELECT COUNT("T c (K)") FROM "1-101336-1" WHERE "Notation" = 'Tl-2212';