lcrystal.net/optics_17.htm">Thallium Bromoiodide (KRS-5) - ICL</a></li>
<li><a href="http://www.crystran.co.uk/optical-materials/krs5-thallium-bromo-iodide-tlbr-tli">KRS5 Thallium Bromo-Iodide (TlBr-TlI) - Crystran</a></li>
</ul>
