fig2

Figure 2. X-ray powder diffraction (XRPD) patterns of as-synthesized and sintered Bi2Te3 (A) and Sb2Te3 (B) samples. The major crystalline phases are indexed to Bi2Te3 (ICDD: 01-085-0439) and Sb2Te3 (ICDD: 96-900-7591), with rhombohedral crystal structure.