SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Thallium. Vial containing a sample of the post-transition metal thallium (Tl). Thallium sulphide's electrical conductivity changes with exposure to infrared light and is therefore used to make photoresistors for the electronics industry. Thallium is also used in the pharmaceutical industry, in glass manufacturing, and in infrared detectors.
Model release not required. Property release not available.