Zintl compound

In summary, the new Ln5 xCaxGe4 alloys show that the formation of the metal-rich Zintl compounds RsTt4 can be extended to an electron-deficient region... 

Physical properties and detection of liquid Zintl compounds have been discussed and problems of gradual development of stoichiometries in non-clustering liquid ionic alloys, and their agreement with those persisting in the solid, have been considered. Neutron diffraction techniques and the results of their applications (Ga, Tl, alkali alloys) have been described. 

A comprehensive book on chemistry, structure and bonding of Zintl compounds has been edited by Kauzlarich (1996) in this book several aspects of Zintl phases such as structural patterns, molecular transition complexes of Zintl ions, transition metal Zintl compounds are deeply discussed. 

Figure 4.25. Structure of the (Al2Sb6)12 ion (isostructural with the A12C16 molecule) identified in the Zintl compound Ba3AlSt>3. Another important compound having this structure, consisting of two-centred tetrahedra with a common edge, is the simple di-borane (B2H6).

Abstract This review highlights how molecular Zintl compounds can be used to create new materials with a variety of novel opto-electronic and gas absorption properties. The generality of the synthetic approach described in this chapter on coupling various group-IV Zintl clusters provides an important tool for the design of new kinds of periodically ordered mesoporous semiconductors with tunable chemical and physical properties. We illustrate the potential of Zintl compounds to produce highly porous non-oxidic semiconductors, and we also cover the recent advances in the development of mesoporous elemental-based, metal-chalcogenide, and binary intermetallic alloy materials. The principles behind this approach and some perspectives for application of the derived materials are discussed. 

Keywords Chalcogenide Germanium compound Mesoporous semiconductor Self-assembly Zintl compound... 

The paradigm of how molecular-based Zintl compounds can be used to make porous materials has been demonstrated. The potential of Zintl phases to act as starting materials for the synthesis of a wide variety of open frameworks is enormous because of the broad diversity of such phases. Not only Zintl anions such as Eg and E4 (E = Ge, Si, Sn, Pb), Asy, E 14, Sby, and Inn composed of single elements but also binary and ternary ones, such as SnxE9 x" (E = Ge, Pb),... 

Lanthanide skutterudites as Zintl compounds 5 14.1. Introduction to thermoelectric mated- ... 

Yb-AlSb. Fisher et al. (2000) reported the crystal structure of the Zintl compound Ybi4AlSbn, to have the CaMAlSbn structure type, a = 1.6561, c = 2.2102 (X-ray single crystal diffraction). 

Zintl compounds, many of which are colored, should be of interest for these studies. Unfortunately they are extremely reactive. 

These compounds are named for the German chemist Eduard Zintl who pioneered their study during the 1920s and 1930s. It is instructive to survey the main classes of compounds that are not Zintl compounds in order to show why they are appropriately considered as a separate class. 

These compounds are discussed here as a class because they are formed by a large number of elements and they cannot, therefore, be described satisfactorily under the heading of one element or even one group of elements, since many Zintl compounds contain elements from two groups, e.g., Na2Ga3Sb3. 

Zintl compounds to be mentioned in other chapters are compounds or phases that have anions such as Sng-, Sn2Bi2 or Pb1. The alkali metal salts can often be isolated crystalline by complexation of the cation with crown ethers or cryptands. Recent examples are Na jSn16 and Li2Ba4Si6, the latter having a SiJ0- ring.17 Saline hydrides were discussed in Chapter 2. 

Germanium, tin, and lead give alloy-type binaries of the alkali metals of variable stoichiometry, but when dissolved in ammonia with the alkali metals they produce colored Zintl-type anions see Zintl Compounds) in solution which can be... 

Some other Zintl anions (see Zintl Compounds) of... 

Borides Sohd-state Chemistry Carbides Transition Metal Solid-state Chemistry Electronic Structure of Sohds Quasicrystals Structure Property Maps for Inorganic Solids Superconductivity Zintl Compounds. 

Ternary Zintl phases that incorporate arsenic are exemplified by Ba4 SiAs4 (s ee Zintl Compounds). The material is made of tetrahedral SiAs4 units whose charge is compensated for by the Ba cations. 

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