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As2Te3 (alpha phase) is a semiconductor (~0.2-0.3 eV), thermoelectric material and a topological insulator. 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.
The Arsenicum Telluride crystals have a typical lateral size of ~0.6-0.8 cm. The crystals are rectangular shaped and have a metallic appearance.
As2Te3 crystal properties
| Crystal size | ~10 mm |
| Electrical properties | Semiconductor, Topological Insulator, 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 |
| |
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
Click on an image to zoom
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.<h1 style="background-color:#FFFFFF;font-family:" color:#444444;font-weight:normal;"="">
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