ThF₄ (Thorium tetrafluoride)

Glasses, oxides and dielectrics

1 dataset, together covering 0.26–0.76 µm. Default: Heitmann and Ritter 1976: n 0.26–0.76 µm.

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Datasets

Heitmann and Ritter 1976: n 0.26–0.76 µm n 0.26–0.76 µm default

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# ThF4 (Thorium tetrafluoride): Heitmann and Ritter 1976: n 0.26–0.76 µm
thf4 = ls.fetch_refractiveindex("main", "ThF4", "Heitmann", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(thf4.range_nm)  # (260, 760) nm
eps = thf4.eps([633])  # complex permittivity

Downloads the original record once (pinned to the imported snapshot) and caches it.

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_bb3319c848b5/lightsmith"
thf4 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(thf4.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (thf4/heitmann-ritter-1976).

# ... load thf4 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=thf4)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=400, stop_nm=760, num=81),
)
res = ls.solve(sim)  # exact Mie for a sphere
print(res.q_ext)     # extinction efficiency at each wavelength

Same spec runs with DDA, FDTD, BEM or T-matrix: ls.compare(sim, ["mie", "dda"]).

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_bb3319c848b5/lightsmith?model=drude_lorentz"
thf4_dl = ls.DrudeLorentz.model_validate(json.load(urllib.request.urlopen(url)))

A dispersive Drude–Lorentz model for time-domain solvers.

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Lightsmith is open source (MIT): Mie, T-matrix, BEM, DDA, FDTD, RCWA, TMM, mode solvers and inverse design behind one spec, on CPU or GPU. GitHub.

About ThF4 (Thorium tetrafluoride)

Thorium tetrafluoride (ThF₄) is a white crystalline solid and is one of the principal halide compounds of thorium. Due to its high melting point and low refractive index, it has been investigated as a potential material for optical windows, especially in the infrared range. ThF₄ has been found to possess favorable transmission properties in the mid and far-infrared spectrum, making it suitable for some infrared optics applications. Furthermore, as with many thorium compounds, it is radioactive because thorium is predominantly found as the isotope Th-232, which decays over time. Handling and use of ThF₄ therefore require precautions to protect against radiation exposure. The compound also serves as an intermediate in the processing of thorium from its ores and can be a precursor to other thorium compounds in various chemical processes.

Other names: Thorium tetrafluoride, Thorium(IV) fluoride, Thorium fluoride

API: /v1/materials/mat_d560351dbdd6 · slug thf4