Molybdenum is a chemical element with symbol Mo and atomic number 42. Molybdenum does not occur naturally as a free metal on Earth; it is found only in various oxidation states in minerals.
M 2997 (OTTOKEMI) Molybdenum foil, 0.05 mm thick, 99.9% -used as a hermetic seal and lead-in conductor in quartz halogen and electric discharge lamps, perfectly matching the thermal expansion characteristics of quartz glass.