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No uranium oxyanion, such as [UO 4] 2− or [U 2 O 7] 2−, is known. Instead, all uranate structures are based on UO n polyhedra sharing oxygen atoms in an infinite lattice. [ 1 ] The structures of uranates(VI) are unlike the structure of any mixed oxide of elements other than actinide elements.
The compounds identified in yellowcakes include uranyl hydroxide, uranyl sulfate, sodium para-uranate, and uranyl peroxide, along with various uranium oxides. Modern yellowcake typically contains 70% to 90% triuranium octoxide (U 3 O 8) by weight. Other oxides such as uranium dioxide (UO 2) and uranium trioxide (UO 3) exist. [4]
Sodium diuranate, also known as the yellow oxide of uranium, is an inorganic chemical compound with the chemical formula Na 2 U 2 O 7. It is a sodium salt of a diuranate anion. It forms a hexahydrate Na 2 U 2 O 7 ·6H 2 O. Sodium diuranate is commonly referred to by the initials SDU. [1] Along with ammonium diuranate it was a component in early ...
Uranyl nitrate is a water-soluble yellow uranium salt with the formula UO 2 (NO 3) 2 · n H 2 O.The hexa-, tri-, and dihydrates are known. [3] The compound is mainly of interest because it is an intermediate in the preparation of nuclear fuels.
The Sortes Vergilianae (Virgilian Lots) is a form of divination by bibliomancy in which advice or predictions of the future are sought by interpreting passages from the works of the Roman poet Virgil. The use of Virgil for divination may date to as early as the second century AD, and is part of a wider tradition that associated the poet with ...
Magnesium diuranate (MgU 2 O 7) is a compound of uranium. [1] It is known in the uranium refining industry as "MDU" and forms the major part of some yellowcake mixtures. Yellowcakes are an intermediate product in the uranium refining process. To produce this form of yellowcake, crushed ore is mixed with hot water to a 58% solids slurry.
Ball-and-stick model of UO 2+ 2 The uranyl ion, showing the U–O bond order of 3. The uranyl ion is an oxycation of uranium in the oxidation state +6, with the chemical formula UO 2+
1% and 2% uranyl acetate solutions are used as an indicator, and a titrant in stronger concentrations in analytical chemistry, as it forms an insoluble salt with sodium (the vast majority of sodium salts are water-soluble). Uranyl acetate solutions show evidence of being sensitive to light, especially UV, and will precipitate if exposed.