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Gallium is a chemical element; it has the symbol Ga and atomic number 31. Discovered by the French chemist Paul-Émile Lecoq de Boisbaudran in 1875, [13] elemental gallium is a soft, silvery metal at standard temperature and pressure. In its liquid state, it becomes silvery white. If enough force is applied, solid gallium may fracture conchoidally.
Bauxite is the main source of the rare metal gallium. [17] During the processing of bauxite to alumina in the Bayer process, gallium accumulates in the sodium hydroxide liquor. From this it can be extracted by a variety of methods. The most recent is the use of ion-exchange resin. [18]
Metal Largest producer Second largest producer Complete list Aluminium [6] China India List of countries by aluminium production: Bauxite [7] Australia Guinea List of countries by bauxite production
Before World War II, the economy of Europe remained largely on coal as its source of primary energy with very little of the diversification into oil and gas that had already occurred in the United States. [4] Coal, which was a major fuel for the world's largest economies for more than a century, is now giving way to renewables. [5]
The curbs strengthen enforcement of existing limits on critical minerals exports that Beijing began rolling out last year, but apply only to the U.S. market, in the latest escalation of trade ...
VMS deposits have an ideal form of a conical area of highly altered volcanic or volcanogenic sedimentary rock within the feeder zone, [definition needed] which is called the stringer sulfide or stockwork zone, overlain by a mound of massive exhalites, and flanked by stratiform exhalative sulfides known as the apron.
A geologic map or geological map is a special-purpose map made to show various geological features. Rock units or geologic strata are shown by color or symbols. Bedding planes and structural features such as faults , folds , are shown with strike and dip or trend and plunge symbols which give three-dimensional orientations features.
Mining firm Rare Earths Norway says it has discovered Europe’s largest proven deposit of highly prized rare earth elements, potentially reflecting a watershed moment for both the Nordic country ...