2H-TaSe2 (2H phase Tantalum Diselenide)

2H-TaSe2 is a metal, an incommensurate Charge density waves (CDW) system at ~120K, a commensurate CDW at ~90K and a superconductor with Tc ~0.1K. The layers are stacked together via van der Waals interactions and can be exfoliated into thin 2D layers. Tantalum Diselenide belongs to the group-V transition metal dichalcogenides (TMDC). 

The 2H phase TaSe2 crystals produced at HQ Graphene have a typical lateral size of ~0.6-0.8 cm, hexagonal shaped and have a metallic appearance. 
2H TaSe2 crystal properties

The single crystal 2H TaSe2 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: 785 nm Raman system

Raman, XRD and EDX on 2H TaSe2:

X-ray diffraction on a 2H-TaSe2 single crystal aligned along the (001) plane. XRD was performed at room temperature using a D8 Venture Bruker. The 4 XRD peaks correspond, from left to right, to (00l) with l = 2, 6, 8, 10

Powder X-ray diffraction (XRD) of a single crystal 2H-TaSe2. X-ray diffraction was performed at room temperature using a D8 Venture

Bruker.Stoichiometric analysis of a single crystal 2H-TaSe2 by Energy-dispersive X-ray spectroscopy (EDX).
Raman spectrum of a single crystal 2H-TaSe2. Measurement was performed with a 785 nm Raman system at room temperature.