14th group elements

The 14th group elements a summary of their atomic and physical properties See Tables 5.68-5.70. 

Remarks on the alloy crystal chemistry of the 14th group elements. Carbides. Among the elements of the 14th group, the chemical behaviour of carbon is peculiar. It may be useful to dedicate a few particular comments to its combinations with the metals. 

An interesting related feature shown by several alloys of the more basic metals (alkali, alkaline earths) with many /5-block (13th, 14th, 15th groups) elements, and,... 

ALLOYS OF THE ELEMENTS OF THE 14TH GROUP OF THE PERIODIC TABLE... 

The tI4-(3Sn structure, under high pressure is observed also for other elements of the 14th group, that is by Si and Ge. 

Stimulated emission (SE) and lasing effects are found in plasma of atoms of elements from the 13th and 14th groups of the periodic table. Atoms of A1 and In in laser-induced plasma both possess a three-level lasing system. In T1 plasma both... 

A review about the Zintl phases has been published by Sevov (2002) from the introduction of this publication we quote a few remarks. It was preliminary observed that the number of Zintl phases has increased many-fold since Zintl s time and that the definition of a Zintl phase has never been very exact often compounds that include non-metals have been considered in this family. The paper by Sevov is mainly dedicated to clearly intermetallic Zintl phases (that is phases containing main group metals, semi-metals or semiconductors only). Attention has therefore been dedicated to compounds of alkali metals with the elements of the 13th, 14th and 15th groups (without B, Al, C, N and P). To this end the following definitions and statements have been considered. 

Moving from one element to the other down the group we notice a decrease in the compound formation elements according to a scheme similar to those observed in the 12th, 14th and 15th groups. 

Notice that in the following only a selection is presented of the crystal structures of the elements of the 14th to 17th groups. A few more details and data are reported in the specific paragraphs of Chapter 5. 

Many ternary alloys MeT2X2 (Me = Th, U, alkaline earth, rare earth metal, etc., T = Mn, Cr, Pt family metal, X = element of the 15th, 14th and occasionally 13th group) have been systematically prepared and investigated (Rossi cl al., 1979, Parthe and Chabot 1984). A few hundreds of them resulted in the ThCr2Si2 (or... 

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