To request the proprietary encrypted file please enter your Filmetrics system information
Tantalum is a chemical element with the symbol Ta and atomic number 73. A rare, hard, blue-gray, lustrous transition metal, tantalum is highly corrosion resistant.
For a typical sample of Ta the refractive index and extinction coefficient at 632.8 nm are 1.72416 and 2.075176. 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: