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Hafnium(IV) oxide is the inorganic compound with the formula HfO2. It is an electrical insulator with a band gap of approximately 6 eV.
For a typical sample of HfO2 the refractive index and extinction coefficient at 632.8 nm are 1.91 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 - Sopra Material Database
No guarantee of accuracy - use at your own risk.
Tab-delimited data file for unrestricted use: