Mercury sulfide

Mercury sulfide
Mercury sulfide
Identifiers
CAS number 1344-48-5 YesY
Properties
Molecular formula HgS
Molar mass 232.66 g/mol
Density 8.10 g/cm3
Melting point

580 °C decomp.

Solubility in water insoluble
Band gap 2.1 eV (direct, α-HgS) [1]
Refractive index (nD) w=2.905, e=3.256, bire=0.3510 (α-HgS) [2]
Hazards
MSDS ICSC 0981
EU Index 080-002-00-6
EU classification Very toxic (T+)
Dangerous for the environment (N)
R-phrases R26/27/28, R33, R50/53
S-phrases (S1/2), S13, S28, S45, S60, S61
Flash point Non-flammable
Related compounds
Other anions Mercury oxide
Mercury selenide
Mercury telluride
Other cations Zinc sulfide
Cadmium sulfide
 YesY sulfide (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Mercury sulfide, mercuric sulfide, 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.[3]

Contents

Crystal structure

Cinnabar from Nevada, USA

HgS is dimorphic with two crystal forms:

  • red cinnabar (α-HgS, hexagonal, hP6, P3221), is the form in which mercury is most commonly found in nature.
  • black, metacinnabar (β-HgS), is less common in nature and adopts the zinc blende (T2d-F-43m) crystal structure.

Crystals of red, α-HgS, are optically active. This is caused by the Hg-S helices in the structure.[4]

Preparation and chemistry

β-HgS is precipitated as a black powder when H2S is bubbled through solutions of Hg(II) salts.[5] β-HgS is unreactive to all but concentrated acids.[3]
Mercury metal is produced from the cinnabar ore by roasting in air and condensing the vapour.[3]

Uses

α-HgS is used as a red pigment when it is known as vermilion. Vermilion is known to darken and this has been ascribed to conversion from red α-HgS to black β-HgS. Investigations at Pompeii where red walls when originally excavated have darkened has been ascribed to the formation of Hg-Cl compounds (e.g., corderoite, calomel, and terlinguaite) and calcium sulfate, gypsum, rather than β-HgS, which was not detected.[6]

See also

References

  1. ^ L. I. Berger, Semiconductor Materials (1997) CRC Press ISBN 0849389127
  2. ^ Webminerals
  3. ^ a b c Greenwood, Norman N.; Earnshaw, A. (1984). Chemistry of the Elements. Oxford: Pergamon. p. 1406. ISBN 0-08-022057-6. 
  4. ^ Glazer, A. M.; Stadnicka K. (1986). "On the origin of optical activity in crystal structures". J. Appl. Cryst. 19 (2): 108–122. doi:10.1107/S0021889886089823. 
  5. ^ Cotton, F. Albert; Wilkinson, Geoffrey; Murillo, Carlos A.; Bochmann, Manfred (1999), Advanced Inorganic Chemistry (6th ed.), New York: Wiley-Interscience, ISBN 0-471-19957-5 
  6. ^ Cotte, M; Susini J, Metrich N, Moscato A, Gratziu C, Bertagnini A, Pagano M (2006). "Blackening of Pompeian Cinnabar Paintings: X-ray Microspectroscopy Analysis". Anal. Chem. 78 (21): 7484–7492. doi:10.1021/ac0612224. PMID 17073416. 

External links


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См. также в других словарях:

  • mercury sulfide — noun : a sulfide of mercury; especially : mercuric sulfide * * * Chem. See mercuric sulfide. [1930 35] …   Useful english dictionary

  • mercury sulfide — Chem. See mercuric sulfide. [1930 35] * * * …   Universalium

  • black mercury sulfide — gyvsidabrio(II) sulfidas statusas T sritis chemija formulė HgS atitikmenys: angl. artificial cinnabar; black mercury sulfide; cinnabar; mercuric sulfide; mercury(II) sulfide; metacinnabarite; vermilion rus. ртути(II) сульфид; ртуть сернистая …   Chemijos terminų aiškinamasis žodynas

  • Mercury(II) oxide — Mercury(II) oxide …   Wikipedia

  • Mercury selenide — Mercury(II) selenide IUPAC name Mercury selenide …   Wikipedia

  • mercury processing — Introduction       preparation of the ore for use in various products.       Mercury (Hg) has a unique combination of physical properties. Its low melting point (−38.87° C [−38° F]) and boiling point (356.9° C [674° F]), high specific gravity (13 …   Universalium

  • mercury(II) sulfide — gyvsidabrio(II) sulfidas statusas T sritis chemija formulė HgS atitikmenys: angl. artificial cinnabar; black mercury sulfide; cinnabar; mercuric sulfide; mercury(II) sulfide; metacinnabarite; vermilion rus. ртути(II) сульфид; ртуть сернистая …   Chemijos terminų aiškinamasis žodynas

  • Mercury(II) selenide — Chembox new Name = Mercury(II) selenide ImageFile = Mercury(II) selenide unit cell 3D ionic.png ImageName = Mercury(II) selenide unit cell IUPACName = OtherNames = Section1 = Chembox Identifiers SMILES = CASNo = 20601 83 6 RTECS = Section2 =… …   Wikipedia

  • Mercury (element) — gold ← mercury → thallium Cd ↑ Hg ↓ Cn …   Wikipedia

  • Sulfide — For other uses, see Sulphide (disambiguation). Sulfide Systematic name Sulfanediide …   Wikipedia


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