# Does cinnabar react with iodine?

Does cinnabar react with bromine and iodine to form elemental sulphur? This reaction was described in "Explorations in the history of science and technology in China" but I have doubts...

• "…reports$^{22,23}$" — you sure have checked these reports, haven't you? Also, what is "Explorations in the history of science and technology in China", an article, a book, a report or a blogpost? How are we supposed to check these references? Mar 2 at 12:44
• 1. I did not verify the possibility of the above mentioned reaction experimentally. 2. Explorations in the History of Science and Technology in China . A Special Number of the " Collections of Essays on Chinese Literature and History . ” Shanghai : Chinese Classics Publications House, 1982. Mar 2 at 13:23

I did a cursory search and found some information particularly from books of late 19th century(1,2):

Cinnabar and iodine

On heating, it (cinnabar) is readily decomposed with formation of small scarlet crystals of mercuric iodide.

Cinnabar and bromine

[...] After digesting the cinnabar with excess of bromine liquid (or bromine water containing 3% of bromine or solution of hydrochloric acid containing 13% of bromine) for a few days, the whole is dissolved, and also any metallic mercury present [...] The amount of bromine required is very considerable, 1 part of mercury is obtained and 3.5 parts of hydrobromic acid remains in the solution.

References

1. Chemical News and Journal of Industrial Science, Volumes 37-38, Chemical news office., 1878
2. Dictionary of Arts, Manufactures and Mines by Robert Hunt, Andrew Ure, 1878