Clathrates represent a fascinating class of inorganic materials with a unique structural motif:
3D framework with large polyhedral cages encapsulating guest ions. Weak electrostatic …

Crystalline open-framework and nanoporous materials have long attracted the attention of
chemists, physicists, and materials scientists. The intriguing structures such materials exhibit …

A new silicon clathrate compound containing barium,(Na, Ba) x S i 46, becomes a type-II
superconductor with a critical temperature (T c) of about 4 K. In the compound, the silicon …

The energetics and band structures of the elemental semiconductor Si in two fourfold-
coordinated clathrate structures have been studied. For the Si (34) and Si (46) structures we …

The quantitative synthesis of four silicon and germanium compounds with the clathrate-II
structure, Cs8Na16Si136 (1), Cs8Na16Ge136 (2), Rb8Na16Si136 (3), and Rb8Na16Ge36 …

We study solids of Si 20 fullerenes, Si 46 and Na 2 Ba 6 Si 46, in the framework of density-
functional theory. The electronic structure of Si 46 is remarkably different from that of the …

We report on the synthesis and characterization of two silicon clathrates, Na8Si46 and
NaxSi136 (x= 4–23), by powder X-ray diffraction, combined with Rietveld profile analysis. In …

We review the investigations on clathrate materials having C, Si, Ge or Sn framework atoms
in which the pressure parameter plays an important role. In this article, we studied the …

Compounds with cage-like structures of elemental silicon and carbon are comparatively
reviewed. Barium containing silicon clathrate compounds isomorphous with type I gas …

6.4. Resonance properties of other cluster compounds and colloids........................... 193 6.4.
1. Pt55 cluster compounds....................................................... 193 6.4. 2. Crystalline Ni38Pt6 …