In an experiment I did, however, I was not capable of making "SeS2" from pure Se and pure S. I took a little S, melted this until I obtained a yellow
liquid (which still is mobile) and I added a small amount of pure Se. This Se dissolves (slowly), and it makes the liquid very dark, almost black. On
cooling down, I obtained an olive-green solid. This solid only contained a tiny amount of Se, compared to S, but this smnall quantity of Se has a very
strong influence on the color of the S. In my experiment, probably no rings were broken en simply very dark Se dissolved in the sulfur, giving a very
dark solution, which also remains dark when it solidifies again. |