Germanium telluride - What is it? How does it work?

Germanium telluride physical and chemical properties

Density: 6.14g /mL at 25 °C(lit.)

Melting point: 725ºC(lit.)

Molecular formula: GeTe

Molecular weight: 204.27200

Exact Mass: 207.85900

Appearance: Black crystal

Storage conditions: closed at room temperature, cool ventilated dry place

Stability: Stable under normal temperature and pressure; Avoid light, open flame, and high temperature

Germanium telluride powder toxicity and ecology

Germanium telluride toxicological data main irritating effects on the skin skin and mucous membranes on the eyes effect of irritation Sensitization: No known sensitization phenomena germanium telluride ecological data: generally slightly harmful to water bodies, do not expose undiluted or large quantities of products to groundwater, waterways or sewage systems, and do not release materials into the surrounding environment without government permission.

Preparation of germanium powder 

GeTe is prepared by heating Ge(low resistivity) and Te(99.998%) to their melting points in a vacuum-evacuated quartz tube. Single crystal can be obtained by zone melting.

Crystals of germanium telluride crystalline

Germanium telluride crystal, periodic table group VI element compound semiconductor. Triangular crystal is face - centered structure. It is a direct bandgap semiconductor, with a room temperature forbidden bandwidth of 0.23eV, and a narrow energy gap semiconductor with a cing-hole mobility of 7x10-3mzilV "S. The product was prepared by melting and recombination method.

Application of germanium telluride

Germanium telluride is a thermoelectric material used for infrared light emission and detection.