ArticleslgStudy

chemistry

Mercury telluride

Mercury telluride is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Mercury telluride rather than just read about it. In short: Mercury telluride (HgTe) is a binary chemical compound of mercury and tellurium. It is a semi-metal related to the II-VI group of semiconductor materials.

Mercury telluride — main illustration
Mercury telluride — illustration

Key takeaways

  • Mercury telluride belongs to chemistry; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Mercury telluride to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Mercury telluride from memory before moving on to harder problems.

Reference excerpt

Mercury telluride (HgTe) is a binary chemical compound of mercury and tellurium. It is a semi-metal related to the II-VI group of semiconductor materials. Alternative names are mercuric telluride and mercury(II) telluride. HgTe occurs in nature as the mineral form coloradoite.

Physical properties All properties are at standard temperature and pressure unless stated otherwise. The lattice parameter is about 0.646 nm in the cubic crystalline form. The bulk modulus is about 42.1 GPa. The thermal expansion coefficient is about 5.2×10−6/K. The static and dynamic dielectric constants are 20.8 and 15.1, respectively. The thermal conductivity is low at 2.7 W·m2/(m·K). HgTe bonds are weak leading to low hardness values. The hardness is 2.7×107 kg/m2.

Doping N-type doping can be achieved with elements such as boron, aluminium, gallium, or indium. Iodine and iron will also dope n-type. HgTe is naturally p-type due to mercury vacancies. P-type doping is also achieved by introducing zinc, copper, silver, or gold.

Topological insulation

Mercury telluride was the first topological insulator discovered, in 2007. Topological insulators cannot support an electric current in the bulk, but electronic states confined to the surface can serve as charge carriers.

Chemistry HgTe bonds are weak. Their enthalpy of formation, around −32kJ/mol, is less than a third of the value for the related compound cadmium telluride. HgTe is easily etched by acids, such as hydrobromic acid.

Growth Bulk growth is from a mercury and tellurium melt in the presence of a high mercury vapour pressure. HgTe can also be grown epitaxially, for example, by sputtering or by metalorganic vapour phase epitaxy. Nanoparticles of mercury telluride can be obtained via cation exchange from cadmium telluride nanoplatelets.

See also Cadmium telluride Mercury selenide Mercury cadmium telluride

References

External links Thermophysical properties database at Germany's Chemistry Information Centre, Berlin

Illustrations

Mercury telluride illustration
Mercury telluride: Electron micrograph (right) of a HgTe nanowire embedded in a carbon nanotube, combined with an image simulation (left).[4]
Electron micrograph (right) of a HgTe nanowire embedded in a carbon nanotube, combined with an image simulation (left).[4]

Worked examples

Example 1 — a first encounter with Mercury telluride

Start with the simplest possible case. Write down what Mercury telluride claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Mercury telluride before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Mercury telluride ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Mercury telluride

In research
Mercury telluride appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Mercury telluride in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Mercury telluride is common in secondary-school and first-year university syllabi. It links to neighbouring topics II-VI semiconductors, Mercury(II) compounds, Semimetals, so understanding it makes those chapters shorter.
In everyday life
Look for Mercury telluride outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Mercury telluride” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Mercury telluride in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Mercury telluride means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Mercury telluride out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Mercury telluride in simple terms?

Mercury telluride (HgTe) is a binary chemical compound of mercury and tellurium. It is a semi-metal related to the II-VI group of semiconductor materials.

Why does Mercury telluride matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Mercury telluride?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Mercury telluride.

Tags

  • II-VI semiconductors
  • Mercury(II) compounds
  • Semimetals
  • Tellurides
  • Zincblende crystal structure

Keep exploring