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sci.wigner-seitz-radius-rs Calculator
Calculates the Wigner-Seitz radius rs = (3/(4πn))^(1/3) from electron density n, and the dimensionless parameter r_s in units of Bohr radius a₀. r_s = 2 corresponds to high-density metals (aluminium); r_s = 5 to low-density alkali metals (caesium) — exchange-correlation energy in DFT depends critically on r_s.
Inputs
N E M3
Mass per unit volume (kg/m³). Water: 1,000. Air: 1.225. Steel: 7,850. Affects buoyancy, flow, and structural loads.