There still exists a crucial need for new thermoelectric materials to efficiently recover waste
heat as electrical energy. Although metal phosphides are stable and can exhibit excellent …

Thermal expansion, lattice dynamics, heat capacity, compressibility, and pressure stability of
the intermetallic clathrate Na 24 Si 136 have been investigated by a combination of first …

Clathrates can form a type of guest-host solid structures that, unlike most crystalline solids,
have very low thermal conductivity. It is generally thought that the guest atoms caged inside …

The unique crystal structures clathrates possess, in which atoms reside inside polyhedral
cavities typically formed by framework group-14 elements, directly results in unconventional …

Clathrates have been reported to form in a variety of different structure types; however,
inorganic clathrate-I materials with a low-cation concentration have yet to be investigated …

The low-density clathrate-II modification of silicon, Si 136, contains two distinct cage-like
voids large enough to accommodate various types of guest atoms which influence both the …

Electronic, vibrational, and anharmonic studies on some binary clathrate A x Si136 (A= Na,
K, Rb, Cs; 0< x≤ 24) are theoretically presented. The Fermi energy lies in the range of 1.1 …

Intermetallic clathrates comprise a class of unique crystalline solids displaying remarkable
flexibility in chemical composition, resulting in a wide range of physical properties …

Since the inorganic clathrate prototypes (Na8Si46, Na24Si136) were discovered in 1965, Si-
based Type-II compounds of the form AxRyMzSi136-z (A= Alkali metal; R= Alkali-earth …