As2Te3 (alpha phase Arsenicum Telluride)

As2Te3 Arsenicum Telluride As2Te3 (alpha phase) is a semiconductor (~0.2-0.4 eV) and thermoelectric material. The layers are stacked together via van der Waals interactions and can be exfoliated into thin 2D layers. α-As2Te3 belongs to the group-15 metalloid trichalcogenides. To buy As2Te3 crystals please click here.

The Arsenicum Telluride crystals have a typical lateral size of ~0.6-0.8 cm. The crystals have a metallic appearance.

As2Te3 crystal properties
Crystal size ~8 mm
Electrical properties Semiconductor, Thermoelectric material
Crystal structure Monoclinic C
Unit cell parameters a = 1.430 nm, b = 0.403 nm, c = 0.986 nm, α = γ = 90°, β = 95.40°
Type Synthetic
Purity >99.995 %
Characterized by XRD, Raman, EDX
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The single crystal As2Te3 is characterized using:

XRD: single crystal and powder X-ray diffraction (D8 Venture Bruker and D8 Advance Bruker)
EDX:Energy-dispersive X-ray spectroscopy for stoichiometric analysis
Raman: 785nm Raman system

Raman, XRD and EDX on As2Te3:

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Powder X-ray diffraction (XRD) of a single crystal As2Te3. X-ray diffraction was performed at room temperature using a D8 Venture Bruker.

Stoichiometric analysis of a single crystal As2Te3 by Energy-dispersive X-ray spectroscopy (EDX).

Raman spectrum of a single crystal As2Te3. Measurement was performed with a 785 nm Raman system at room temperature.

HQ Graphene Wiki on:

As2Te3 (Arsenicum Telluride)

1. Khalil, L. et al. "α−As2Te3 as a platform for the exploration of the electronic band structure of single layer β− tellurene." Physical Review B 106.12 (2022): 125152.

2. Khalil, L. et al. "Electronic band gap of van der Waals α-As2Te3 crystals." Applied Physics Letters 119.4 (2021): 043103.


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