feat: add functions to calculate δ, β, n, and k components of the ind…#111

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pkienzle merged 3 commits intopython-periodictable:masterfrom

HarlanHeilman:master

Jan 21, 2026

Commits on Jan 16, 2026

feat: add functions to calculate δ, β, n, and k components of the index of refraction as extensions from the `xsf.index_of_refraction(...)` function.
HarlanHeilman
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Commits on Jan 21, 2026