Structure du sulfure de cuivre et de silicium Cu8SiS6

Preparation, Electrical Properties, Crystal Structure, and Electronic Structure of Cu4GeS4

“…It is a sphalerite superstructure based on a cubic close-packed array of sulfur atoms with space group Cc. Cu GeS was reported to be dimorphic with a phase transition at 57(2)3C (5), the high-temperature phase of which was not quenchable and isotypic with the cubic Ag GeTe structure (6), and the low-temperature phase crystallized in an orthorhombic -Cu SiS type (7). Cu…”

Phase diagrams of the quasi-binary systems Cu2S–SiS2 and Cu2SiS3–PbS and the crystal structure of the new quaternary compound Cu2PbSiS4

“…Copper silicon trisulfide crystallizes in a monoclinic structure (space group Cc) with unit cell parameters a = 0.6332 nm, b = 1.1230 nm, c = 0.6273 nm, β = 107.49 • [17]. The structure of the LT Cu 8 SiS 6 modification is orthorhombic (space group Pmn2 1 , a = 0.69928 nm, b = 0.69000 nm, c = 0.97723 nm) [18]; HT modification is cubic (space group F43m) [19]. The polymorpous transition is observed at 336 K [20].…”

Thermoelectric Performance of Cu8SiS6 with High Electronic Band Degeneracy

“…Besides forming a complex structure with low symmetry, the Cu 8 SiS 6 compound possesses many CuS 3 triangles with various orientations, a low thermal conductivity, and a high isotropy of physical properties could thus be predicted. 59 The refined XRD patterns of the as-prepared Cu Figure 2a,b shows the temperature dependencies of the σ and S of the bulk Cu 8−x SiS 6 (x = 0, 0.04, 0.08, 0.16) samples. The original Cu 8 SiS 6 reveals a low σ in the order of 10 2 S m −1 from 300 to 850 K, due to the low carrier concentration, p h , which is measured to be 1 × 10 19 cm −3 (Table 1).…”