No abstract

No abstract

Thephase transition and crystal structure of the superionic conductor Ag 3 SBr x I 1Àx are investigated by the X-ray diffraction and thermal analysis methods. The room temperature -phase of Ag 3 SBr x I 1Àx (0 x 1) belongs to the cubic system with the space group Pm3m. In the range 0 x < 0:29, the lowtemperature -phase of Ag 3 SBr x I 1Àx shows an ordered arrangement of Ag atoms, which are located at one of the four positions obeying the symmetry of the rhombohedral space group R3. A new low-temperature -phase of Ag 3 SBr x I 1Àx is found in the range 0:29 x 0:83. This phase belongs to the orthorhombic system, and the space group is Pnm2 1 or Pnmm. Another new low-temperature -phase of Ag 3 SBr x I 1Àx , which belongs to the monoclinic or triclinic system, is also found in the range 0:83 < x < 1.

No abstract

No abstract