Lanthanum – 57
Lanthanum is the first member of the lanthanide series. This very reactive element is found in bastnasite and monazite mineral deposits.
Phosphor coating for compact fluorescent lamps (CFL). Nickel metal hydride (NiMH) batteries for electric / hybrid cars, laptop computers, etc. Automotive catalytic converters. Glass polishing for cathode ray tubes (CRT), plasma (PDP), and liquid crystal (LCD) screens. Manufacturing optical lenses for digital cameras and video cameras. Manufacture of high-strength glass substrates for hard disks. Fluid cracking catalysts (FCCs) used to refine heavy oils and tars (ie. shale and oil sands sources) into light fuels like gas, diesel, and jet fuel. Lanthanum phosphors used for x-ray films, MRIs, CATs, and sonogram imaging.