Tags: Chemical Compound, Chemical Substance.
Thallium(I) sulfide Tl2S is a chemical compound of thallium and sulfur.It was used in some of the earliest photo-electric detectors by T. Case who developed the so-called thalofide (sometimes spelt thallofide) cell used in early film projectors. Case described the detector material as consisting of thallium oxygen and sulfur and this was incorrectly described by others as being thallium oxysulfide which incidentally is a compound that is not known. Case’s work was then built on by R.J.
