*Article* **Crystal Growth of the Quasi-2D Quarternary Compound AgCrP2S<sup>6</sup> by Chemical Vapor Transport**

**Sebastian Selter <sup>1</sup> , Yuliia Shemerliuk <sup>1</sup> , Bernd Büchner 1,2 and Saicharan Aswartham 1,\***


**\*** Correspondence: s.aswartham@ifw-dresden.de

**Abstract:** We report optimized crystal growth conditions for the quarternary compound AgCrP2S<sup>6</sup> by chemical vapor transport. Compositional and structural characterization of the obtained crystals were carried out by means of energy-dispersive X-ray spectroscopy and powder X-ray diffraction. AgCrP2S<sup>6</sup> is structurally closely related to the *M*2P2S<sup>6</sup> family, which contains several compounds that are under investigation as 2D magnets. As-grown crystals exhibit a plate-like, layered morphology as well as a hexagonal habitus. AgCrP2S<sup>6</sup> crystallizes in monoclinic symmetry in the space group *P*2/*a* (No. 13). The successful growth of large high-quality single crystals paves the way for further investigations of low dimensional magnetism and its anisotropies in the future and may further allow for the manufacturing of few-layer (or even monolayer) samples by exfoliation.

**Keywords:** transition metal phosphorus sulfide; van der Waals layered material; 2D material; low dimensional magnetism; magnetic chains; crystal growth; chemical vapor transport; powder X-ray diffraction; rietveld refinement
