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Niobium pentoxide is the inorganic compound that is the main precursor to all materials made of niobium such as optical glasses or capacitors.
For a typical sample of Nb2O5 the refractive index and extinction coefficient at 632.8 nm are 2.31556 and 0. Below are files of complete refractive index and extinction coefficients. If the file is not available for download, you can request our proprietary file by clicking "Request".
Refractive Index Reference - Filmetrics Composite
No guarantee of accuracy - use at your own risk.
Proprietary encrypted file for use with Filmetrics Systems: