HgS Mercury sulfide

Mercury is a relatively rare chemical element. In the lithosphere it occurs mainly as sulfides, HgS. Mercury sulfide comes in two forms cinnibar, which is black, and vermillion. In some places mercury exists in a small proportion as free chemical species. 

Sulfur Polymer Cement. SPC has been proven effective in reducing leach rates of reactive heavy metals to the extent that some wastes can be managed solely as low level waste (LLW). When SPC is combined with mercury and lead oxides (both toxic metals), it interacts chemically to form mercury sulfide, HgS, and lead sulfide, PbS, both of which are insoluble in water. A dried sulfur residue from petroleum refining that contained 600-ppm vanadium (a carcinogen) was chemically modified using dicyclopentadiene and oligomer of cyclopentadiene and used to make SC (58). This material was examined by the California Department of Health Services (Cal EPA) and the leachable level of vanadium had been reduced to 8.3 ppm, well below the soluble threshold limit concentration of 24 ppm (59). 

With this, the complex iron pigment does indeed deserve to be called insoluble, as only one part of dissolved Iron Blue can statistically be found in 100,000,000,000,000,000,000,000,000,000 parts of water (1029). The actual solubility would therefore be less by a factor of 102° as determined by Tananaev el al., which would come pretty close to values calculated for other so-called insoluble compounds, like mercury sulfide (HgS). However, one must consider that the chemistry of Fe3+ in aqueous solutions doesn t justify the terms dissolved or precipitated , since a multitude of complexes do exist in the... 

Between the years 1400 and 1890 the reds that artists used were extracted from plants, such as madder, or from crushed insects, such as the scale insect Dactylopius coccus, or were of mineral origin, such as cinnabar (mercury sulfide, HgS) which could be ground to a powder to produce the pigment vermilion which was much used in antiquity, or red iron oxide (Fe203) which was used by the Neolithic cave painters, or minium (red lead, Pb304). 

HfCli Hafnium chloride, 4 121 HgF Mercury (I) fluoride, 4 136 HgFs Mercury(II) fluoride, 4 136 HgS Mercury(II) sulfide, 1 19 Hg2Eu2 Europium amalgam, 2 68n. 

Before ad 1500, many alchemists thought that matter was composed of two "elements" mercury and sulfur. To impress their patrons, they performed an experiment with mercury sulfide, also called cinnabar, HgS. They heated the red cinnabar, which drove off the sulfur and left the shiny liquid mercury. On further heating, the mercury reacted to form a red compound again. Alchemists wrongly thought that the mercury had been converted back to cinnabar. What Hg(ll) compound do you think was really formed when the mercury was heated in the air What is the mass percent of mercury in this new compound What is the mass percent of mercury in cinnabar ... 

Sulfur also occurs in a number of important minerals. Some examples are barite, or barium sulfate (BaS04) celestite, or strontium sulfate (SrS04) cinnabar, or mercury sulfide (HgS) galena, or lead sulfide (PbS) pyrites, or iron sulfide (FeS2) sphalerite, or zinc sulfide (ZnS) and stibnite, or antimony sulfide (Sb2S3). 

Mercury is a unique element. An extremely heavy metal, it is the only metallic element that exists in liquid form at room temperature. This silvery white metal is a good conductor of electricity, but it is a poor conductor of heat, which is unusual for metals. Scientists have shown that mercury has been known to humanity for thousands of years. People in ancient China knew of the metal, and samples of it have been found in Egyptian tombs dating back to 1500 b.c. While its name comes from the planet Mercury, its chemical symbol, Hg, comes from the Latin word hydragyrum, which means liquid silver. Mercury s primary ore is cinnabar, which is also known as vermillion. This ore, found chiefly in Spain and Italy, contains an abundance of mercury sulfide compounds. Mercury is extracted from cinnabar by heating the ore and then condensing the resulting vapor. 

HgS Mercury (II) sulfide, 1 19 [Hg(SCN2H4)Cl]Cl Mercury (II) chloride monothiourea, 6 26 [Hg(SCN2H4)2]Cl2 Mercury(II) chloride dithiourea, 6 27 [Hg(SCN2H4)3]Cl2 Mercury (II) chloride trithiourea, 6 28 [Hg(SCN2H4)4]Cl2 Mercury(II) chloride tetrathiourea, 6 28 Hg2Eus Europium amalgam,... 

The Romans mined the mercury ore mercury sulfide, HgS or cinnibar, and roasted the ore in air to obtain the metal, by condensing the mercury vapour given off. Presumably because of the high toxicity of the vapour, the life expectancy of the slaves that worked on the process was about six months ... 

Mercury (II) sulfide Mercury sulfide, black. See Mercury sulfide (ic), black Mercury sulfide (ic), black CAS 1344-48-5 EINECS/ELINCS 215-696-3 Synonyms Mercuric sulfide Mercury (II) sulfide Mercury sulfide, black Empirical HgS... 

In fact, all sulfur powder can do on spilled mercury is to decrease its surface tension a little bit. This may help control the otherwise quite mobile drops of mercury, but does not transform mercury chemically. The liquid metal does in fact react with sulfur to form mercuric sulfide under suitable conditions according to the chemical equation Hg+S=HgS. Mercuric sulfide has two forms red cinnabar and black metacinnabarite. The latter slowly converts to the former if left alone. The reaction of mercury and sulfur is a favorable one in terms of energy, but it does not occur at room temperature. 

Precondition for a voltammetric determination of trace elements in urine is a sample pretreatment. The problem of losses of mercury with classic mineralization methods is described above. To avoid this problem, the authors have developed an acid digestion method with the addition of thioacetamide. All mercury in the sample is converted by this to the extremely poorly soluble mercury sulfide (HgS), which is stable under the conditions chosen. Subsequently hydrogen peroxide is added to oxidize the HgS and liberate the Hg ion [113]. 

Mercury sulfide HgS QfparaU perpend 18.8 (8) 18.1 (5) 20-200 °C Parallel to c axis Perpendicular to c axis, trigonal HgS... 

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