Mercury sulfide Mercury sulfide Mercury sulfide, mercuric sulfide, mercury sulphide, or mercury(II) sulfide is a chemical compound composed of the chemical elements mercury and sulfur. It is represented by the chemical formula HgS. It is virtually insoluble in water. HgS is dimorphic with two crystal forms: Crystals of red, α-HgS, are optically active. This is caused by the Hg-S helices in the structure. β-HgS is precipitated as a black powder when HS is bubbled through solutions of Hg(II) salts. β-HgS is unreactive to all but concentrated acids. Mercury metal is produced from the cinnabar ore by roasting in air and condensing the
Kudremukh Iron Ore Company December 2001. Kudremukh area is a biodiversity hotspot, with Kudremukh national park nearby. The mining lease was temporarily extended, however, it was completely stopped in 2006 due to environmental reasons. In 2016 KIOCL planned to develop a commercial resort in the Kudremukh national park, refurbishing some of its buildings, unused since the closure of the mine. The project had not obtained an environmental clearance. In October 2016 the Ministry of Environment and Forests ordered to immediately stop the work. Kudremukh Iron Ore Company KIOCL Limited, formerly Kudremukh Iron Ore Company Limited is a Government of India enterprise with its head