Gallium silicon compounds

Chemical shifts and coupling constants have been determined in for example cyclopropyl magnesium bromide and the compounds formed with gallium, silicon, mercury, tin and lead. A complete analysis of the metal satellite spectra of tetracyclop-ropyl lead and tin and dicyclopropyl mercury has been presented ... 

Compound 6 crystallizes in the monoclinic space group P2i/n. This structure consists of hydrogen bond linked quartupels of two gallate and two ammonium ions (Fig. 3). The gallium-silicon bond [t(Ga-si = 235.8(1) pm] is comparable to that in 4 and 5,... 

From X-ray crystallographic data and quantum-chemical calculations it was concluded that the gallium-silicon bond is sensitive to electronic and steric influences. Compound 4 will be a versatile starting material for the synthesis of new compounds containing gallium-silicon bonds. 

Antimony (Sb), 3 41-56, 56. See also Group Ill-Sb system InAsSb alloy InSb photodiode detectors/arrays Lead-antimony alloys Low antimony lead alloys Stib- entries in babbitts, 24 797 catalyst poison, 5 257t chemical reactions, 3 42—44 in coal, 6 718 economic aspects, 3 47-48 effect of micro additions on silicon particles in Al-Si alloys, 2 311-312 effect on copper resistivity, 7 676t environmental concerns, 3 50 gallium compounds with, 12 360 health and safety factors, 3 51 in pewter, 24 798... 

Silicon is the most popular material for photovoltaic (PV) power. Another material is gallium arsenide (GaAs), which is a compound semiconductor. GaAs has a crystal structure similar to that of silicon, but it consists of alternating gallium and arsenic atoms. It is well suited for PV applications since it has a high light absorption coefficient and only a thin layer of material is required, which reduces the cost. 

Other framework structures based on zeolites have also been synthesized which contain atoms other than aluminium and silicon, such as boron, gallium, germanium, and phosphorus, which are tetrahedrally coordinated by oxygen. Such compounds are known as zeotypes. Pure aluminium phosphate, commonly called ALPO, and its derivatives, can take the same structural forms as some of the zeolites such as sodalite (SOD), faujasite (FAU), and chabazite (CHA) (e.g., ALPO-20 is isostructural... 

The systems obtained when gallium is in the presence of bismuth, cadmium, germanium, mercury, lead, silicon, or thallium present miscibility gaps. No intermetallic compounds are formed. 

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