Gallium phase diagram

Pu-Ga phase diagram, 29 684. See also Plutonium- gallium alloys PULEG (/-Pulegone, /-menthol from, 24 523... 

The stability of the fee 8-plutonium, which is malleable and easily shaped, is important because of its uses (in nuclear weapons, etc.). This phase may be retained, either in stable or metastable conditions, down to room temperature by the addition of gallium or aluminium. In a way, the two versions of the phase diagram may now be reconciled. The diagram in Fig 5.16 (a) is adequate for practical applications... 

Ga2(W04)3 is identified in the Ga203-W03 phase diagram. Several gallium tungstates and some polytungstate and molybdate complexes have recently been characterized.561,562... 

KEY CONCEPT PROBLEM 10.19 Gallium metal has the following phase diagram (the pressure axis is not to scale). In the region shown, gallium has two different solid phases. 

Only YbAgPb and La4Ni3Pb4 show peculiar structure types, which have first been observed for a plumbide. All other plumbides exhibit relatively simple structure types, which have been observed also for silicides, germanides, stannides, gallides, or indides. We expect that lead characteristic structures will form in the lead rich parts of the ternary systems, similar to the gallium and indium based phase diagrams. 

Aluminum-gallium-antimony system, ternary phase diagrams, 292... 

Other Gallium Compounds.— Phase diagrams of the systems MgSeg-GagSes, (M = La, Nd, Gd, or Y) have been obtained. Two types of intermediate phases were observed MeGaio/aSej (hexagonal, M = La—Gd) and MGaSe (orthorhombic, M = Gd— Dy). 

The results of a recent investigation [3] by thermal and x-ray phase analysis, as well as a determination of the microstructure, enabled the authors to construct for the first time the phase diagram of the gallium—selenium system (Fig. 1), and to confirm the existence of the selenides cited above. 

Fig. 88. Main features of the phase diagrams of gallium with rare earths and actinides.

Elements from column III which have been studied for Li-ion anodes are essentially aluminum (Al) and gallium (Ga). Although the boron-lithium phase diagram shows several compounds [122], Li poorly reacts with B at room temperature [123]. Actually, B or rather Li-B alloys have been studied for application in the so-called thermal batteries, which are primary devices working at high temperature (350-450 °C) with molten salt electrolytes [124, 125]. 

Okamoto H (2006) Gallium-Lithium phase diagram. J Phase Equilib Diff 27 200... 

Fig. 15.15 Schematic phase diagram of Ga-bearing lanthanum silicate - gallium oxide pseudobinary system. LS(G) Ga-bearing lanthanum silicate, LGS langasite and G gallium oxide. (Reproduced by the permission of Elsevier Ltd.)...

For comparison of the TEs for stoichiometrically different surface structures, the TEs are usually plotted versus the chemical potential A/r of one of the elements (usually the cation) in a surface phase diagram. As an example, in Figure 13.17, the calculated TE of different reconstructions on a GaAs(OOl) as a function of the chemical potential A/r(Ga) of gallium with respect to its bulk value are shown. Eor GaAs, — AH(AB) has a value of (0.80 0.15)eV, referred to As-rich conditions. We obtain for the lower and upper limits —0.8 < A/r(Ga) < 0. These... 

Figure 13.17 Calculated phase diagram for different GaAs(OOl) surface structures displaying the total surface energy per (1x1) unit cell versus the variation of the gallium chemical potential A/x(A) with respect to the bulk value (From Refs. [50].). The stable surface structures are at the lower border of the phase diagram.

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