C₈H₁₈ (Octane)

5 datasets, together covering 0.326–25.02 µm. Default: Kerl and Varchmin 1995: n-Octane; 293 K; n 0.326–0.644 µm.

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Datasets

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# C8H18 (Octane): Kerl and Varchmin 1995: n-Octane; 293 K; n 0.326–0.644 µm
c8h18 = ls.fetch_refractiveindex("organic", "octane", "Kerl-293K", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(c8h18.range_nm)  # (326, 644) nm
eps = c8h18.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_7d4563e2520f/lightsmith"
c8h18 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(c8h18.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (octane/kerl-varchmin-1995-293k).

# ... load c8h18 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=c8h18)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=400, stop_nm=644, 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 C8H18 (Octane)

Octane (C₈H₁₈) is a straight-chain alkane comprising eight carbon atoms. It is a primary constituent in gasoline and is employed as a reference standard in the octane rating scale, which measures a fuel's ability to resist engine knocking or pinging. As a liquid at room temperature and atmospheric pressure, octane is less dense than water and possesses a characteristic hydrocarbon odor. In the optical domain, octane's properties can be utilized in certain specialized settings. While it's not highly reactive, safety precautions should be followed when handling octane, particularly due to its flammability. Structural formula: CH₃(CH₂)₆CH₃

Other names: C8H18, C₈H₁₈

API: /v1/materials/mat_b6e04793c0e5 · slug octane