US: Cesium. Atomic element 55, symbolized Cs, weighing 132.9 g/mol, melting at 28.6 C. An uncommon element in the earth's crust amounting to 2-60ppm, this element is extremely soft and forms magmatic crystals and pollucite. Radioactive Cesium has been sought for medical treatments, and the 133 MW isotope carries a resonance frequency off of which time measurement can be based. Infrared photosentivity at 800 nm lends to high thermal and photo emission, often alloyed with gallium, indium, antimony, and thorium.
What is CAESIUM?
CAESIUM: "Which metals are heavier than Casesium?"
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