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Uranium compounds have been used as colorants since Roman times (Caley, 1948). Uranium was discovered as a chemical element in a pitchblende specimen by Martin Heinrich Klaproth, who published the results of his work in 1789. Pitchblende is an impure uranium oxide, consisting partly of the most reduced oxide uraninite (UO2) and partly of U3O8. Earlier mineralogists had considered this mineral to be...
Hydrothermal synthesis generally refers to the preparation of known and novel compounds in water at above-ambient conditions. A somewhat broader approach is taken here to include important compounds derived from ambienttemperature aqueous reactions. Hydrothermal preparative techniques are very old, and compounds such as barium carbonate were prepared in superheated water by Bunsen as early as the...
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