There are many criteria by which superconductors are classified. Superconductor material classes include chemical elements (e.g. mercury or lead), alloys (such

There are many criteria by which superconductors are classified. Superconductor material classes include chemical elements (e.g. mercury or lead), alloys (such as niobium–titanium, germanium–niobium, and niobium nitride), ceramics (YBCO and magnesium diboride), superconducting pnictides (like fluorine-doped LaOFeAs) or organic superconductors (fullerenes and carbon nanotubes; though perhaps these examples should be included among the chemical elements, as they are composed entirely of carbon).[12][13] https://en.wikipedia.org/wiki/Superconductivity https://en.wikipedia.org/wiki/Superconductivity