Citizendia

Mercury(II) selenide
Mercury(II) selenide unit cell
Identifiers
CAS number[20601-83-6]
Properties
Molecular formulaHgSe
Molar mass279. CAS registry numbers are unique numerical identifiers for Chemical compounds Polymers biological sequences mixtures and Alloys They are also referred to A chemical formula is a way of expressing information about the Atoms that constitute a particular Chemical compound, and how the relationship between those atoms changes Molar mass, symbol M, is the Mass of one mole of a substance ( Chemical element or Chemical compound) 55 g/mol
Density8300 kg. The density of a material is defined as its Mass per unit Volume: \rho = \frac{m}{V} Different materials usually have different m-3
Melting point

1270 K

Thermochemistry
Std enthalpy of
formation ΔfHo298		247 kJ. The melting point of a solid is the temperature range at which it changes state from solid to Liquid. The standard enthalpy of formation or "standard heat of formation" of a compound is the change of Enthalpy that accompanies the formation of 1 mole of a mol-1
Specific heat capacity, C178 J. Specific heat capacity, also known simply as specific heat, is the measure of the heat energy required to increase the Temperature of a unit quantity kg-1. K-1
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)
Infobox disclaimer and references

Mercury selenide (HgSe) is a chemical compound of mercury and selenium. In Chemistry, the standard state of a material is its state at 1 bar (100 Kilopascals exactly Mercury (ˈmɜrkjʊri also called quicksilver or hydrargyrum, is a Chemical element with the symbol Hg ( Latinized hydrargyrum Selenium (səˈliniəm is a Chemical element with the Atomic number 34 represented by the chemical symbol Se, an atomic mass of 78 It is a grey-black crystalline solid semi-metal with a sphalerite structure. In Materials science, a crystal is a Solid in which the constituent Atoms Molecules or Ions are packed in a regularly ordered repeating A semimetal is a material with a small overlap in the energy of the conduction band and Valence bands However the bottom of the conduction band is The lattice constant is 0. The Lattice Constant refers to the constant distance between Unit cells in a Crystal lattice. 608 nm.

Mercury selenide can also refer to the following chemical compounds: HgSe2 and HgSe8. HgSe is strictly mercury(II) selenide.

HgSe occurs naturally as the mineral Tiemannite. Tiemannite is a mineral Mercury selenide, formula HgSe It occurs in hydrothermal veins associated with other selenides or other mercury minerals such as

Along with other II-VI compounds, colloidal nanocrystals of HgSe can be formed.

Contents

Applications

Toxicity

HgSe is toxic due to the mercury content (see mercury poisoning). Mercury poisoning (also known as mercurialism, hydrargyria, Hunter-Russell syndrome, or acrodynia when affecting children is a Disease Toxic hydrogen selenide fumes can be evolved on exposure to acids. Hydrogen selenide is H2Se the simplest Hydride of Selenium. H2Se is a colorless flammable gas under standard conditions HgSe is a relatively stable compound which might mean that it is less toxic than elemental mercury or many organometallic mercury compounds.

See also

References

External links

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