| abstract |
A novel sulfide having advantageous properties as a thermoelectric conversion material is provided. In the X-ray diffraction pattern obtained using CuKα rays, the sulfide of the present invention has 2θ = 16.35 ° ± 0.1 °, 2θ = 18.32 ° ± 0.1 °, and It has a diffraction peak of 2θ = 20.05 ° ± 0.1 °, and has a crystal structure containing copper, tin and / or germanium, and a group 6 metal element. [Selection] Figure 1 |