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Structure of a-HgS looking at the a-axis Structure of a-HgS looking at the c-axis. HgS is dimorphic with two crystal forms: red cinnabar (α-HgS, trigonal, hP6, P3221) is the form in which mercury is most commonly found in nature.
Mercury(I) sulfide or mercurous sulfide is a hypothetical chemical compound of mercury and sulfur, with elemental formula Hg 2 S.Its existence has been disputed; it may be stable below 0 °C or in suitable environments, but is unstable at room temperature, decomposing into metallic mercury and mercury(II) sulfide (mercuric sulfide, cinnabar).
Mercury(II) sulfide, HgS, adopts the cinnabar structure described, and one additional structure, i.e. it is dimorphous. [16] Cinnabar is the more stable form, and is a structure akin to that of HgO : each Hg center has two short Hg−S bonds (each 2.36 Å ), and four longer Hg···S contacts (with 3.10, 3.10, 3.30 and 3.30 Å separations).
The richest mercury ores contain up to 2.5% mercury by mass, and even the leanest concentrated deposits are at least 0.1% mercury (12,000 times average crustal abundance). It is found either as a native metal (rare) or in cinnabar, metacinnabar, sphalerite, corderoite, livingstonite and other minerals, with cinnabar (HgS) being the most common ore.
Cinnabar/vermilion – refers to several substances, among them: mercury(II) sulfide (HgS), or native vermilion (the common ore of mercury). Copper Glance – copper(I) sulfide ore. Cuprite – copper(I) oxide ore. Dutch White – a pigment, formed from one part of white lead to three of barium sulfate. BaSO 4
Mercury(II) acetate in acetic acid solution reacts with H 2 S to rapidly precipitate the black (β) polymorph of HgS. With gentle heating of the slurry, the black solid converts to the red form. [4] The mineral cinnabar is red HgS. The precipitation of HgS as well as a few other sulfides, using hydrogen sulfide is a step in qualitative ...
4Department of Chemistry and Engineering Physics, University of Wisconsin-Platteville, Platteville, WI, USA 5Institute for Agriculture and Trade Policy, Minneapolis, MN, USA 6Department of Internal Medicine, California Pacific Medical Center, San Francisco, CA, USA 7Contributing Editor, Alternative Medicine Review, Durango, CO, USA
2 Hg(SCN) 2 → 2 β−HgS + CS 2 + C 3 N 4; β−HgS + O 2 → Hg + SO 2 (not all mercury sulfide decomposes) C 3 N 4 is not a product of this decomposition. Cyanogen is generally only produced when Hg(CN) 2 or similar is heated to decomposition, and early attempts to form (SCN) 2 via the same route starting at this compound failed and only ...