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■ General Properties for Tungsten
○ Symbol : W
○ Atomic Number : 74
○ Atomic Weight : 183.84
○ Crystal structure : BCC
○ Lattice constant at room temperature : 0.316 nm
○ Density : 19.25 g/cm3
○ Melting Point : 3422 °C
○ Boiling Point : 5555 °C
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