Refractive index of Mg (Magnesium)

import lightsmith as ls

# Mg (Magnesium): Vidal-Dasilva et al. 2010: n,k 0.000954–0.0496 µm
mg = ls.fetch_refractiveindex("main", "Mg", "Vidal-Dasilva", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(mg.range_nm)  # (0.953725, 49.5937) nm
eps = mg.eps([6.88])  # complex permittivity

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_d01af6fc108c/lightsmith"
mg = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(mg.source)  # citation and provenance travel with the data

# ... load mg as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=mg)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=1, stop_nm=49, num=81),
)
res = ls.solve(sim)  # exact Mie for a sphere
print(res.q_ext)     # extinction efficiency at each wavelength