Structural disordering studies in Cu6+δPS5I single crystals

Influence of superionic nanoparticles Cu6PS5I on dielectric properties of nematic liquid crystal 6СНВТ

“…At room temperature, the crystals Cu 6 PS 5 I form a cubic crystal lattice (space group m F 3 4 ) [9]. Observed at low temperatures in the Cu 6 PS 5 I crystals are two phase transitions (PT), one of which is superionic and ferroelastic PT of the first order at T I = (144…169) K, the other one -structural PT of the second order at T II = (269±2) K [11,12]. As it was noted in [12], when T I < T < T II the Cu 6 PS 5 I crystals belong to a cubic system (space group c F 3 4 ), while at T < T I -to monoclinic (space group Cc).…”

Structure and Raman spectra of (Cu6PS5I)1–x(Cu7PS6)x mixed crystals

“…While Cu 6 РS 5 I has been investigated more extensively [3,4], the studies of Cu 7 PS 6 are very scarce [5][6][7]. At low temperatures, the Cu 6 РS 5 I crystal undergoes two phase transitions (PTs), one of them being a first-order superionic and ferroelastic PT at T I = 144-169 K, another is a secondorder structural PT at Т II = (269±2) K [8,9].…”

Structural phase transitions and conduction properties of superionic, ferroelastic Cu6PS5Br1−xIxsingle crystals (x= 1, 0.75, 0.5, 0.25)

“…Among the crystals of this family Cu 6 PS 5 Hal (Hal= Cl, Br, I) have been recently extensively studied because of possible application in high energy density batteries and sensors likewise the possibility of phase transitions and order-disorder studies [3][4][5][6][7][8]. Despite the numerous papers related to optical, dielectrical and thermodynamical properties of these compounds the knowledge of the low temperature crystal structures remains very limited.…”