C₂H₂ (Acetylene)

Gases

1 dataset, together covering 0.5461–0.6708 µm. Default: Loria 1909: Gas at 0 °C; n 0.529–0.659 µm.

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Datasets

Loria 1909: Gas at 0 °C; n 0.529–0.659 µm n 0.5461–0.6708 µm default

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# C2H2 (Acetylene): Loria 1909: Gas at 0 °C; n 0.529–0.659 µm
c2h2 = ls.fetch_refractiveindex("organic", "acetylene", "Loria", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(c2h2.range_nm)  # (546.1, 670.8) nm
eps = c2h2.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_d33c6bc8da76/lightsmith"
c2h2 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(c2h2.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (acetylene/loria-1909).

# ... load c2h2 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=c2h2)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=547, stop_nm=670, 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"]).

Materials guide Open a sphere of it in Studio Quick start Ask the community

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 C2H2 (Acetylene)

Acetylene (C₂H₂), often represented as HC≡CH, is a hydrocarbon and the simplest alkyne. It's a colorless gas under normal conditions and has a distinctive garlic-like odor. Acetylene is a key component for oxy-acetylene welding due to its ability to produce an extremely hot flame when combined with oxygen. This gas is also utilized in the production of various organic chemicals and the synthesis of polyethylene plastics and acrylics. Its linear structure confers a high degree of unsaturation, making it reactive in many chemical processes.

Other names: C2H2, C₂H₂, HCCH, Ethyne

API: /v1/materials/mat_0c3e01dd34c3 · slug acetylene