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Radium Nitrate
Radium nitrate is a radioactive salt with the formula Ra(NO3)2. It is a white solid, but old samples appear yellowish-grey. It has a lower solubility than barium nitrate. It decomposes at 280 °C to radium oxide. Production Radium nitrate is produced by the reaction of radium carbonate or radium sulfate with nitric acid Nitric acid is the inorganic compound with the formula . It is a highly corrosive mineral acid. The compound is colorless, but older samples tend to be yellow cast due to decomposition into oxides of nitrogen. Most commercially available nitri ...: :RaCO3 + HNO3 → Ra(NO3)2 + CO2 + H2O References Radium compounds Nitrates {{Chem-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radium Carbonate
Radium carbonate is a compound of radium, carbon, and oxygen. This salt is a poisonous, radioactive, Amorphous solid, amorphous, white powder that is used in medicine. It is notable for being more soluble than barium carbonate, unlike other Radium#Compounds, radium compounds. Even though it is insoluble in water, it is soluble in dilute acids and concentrated ammonium carbonate. Preparation Radium carbonate can be produced by using Ra2+ ions and carbonate:Richard C. Ropp. Encyclopedia of the Alkaline Earth Compounds. Elsevier, 2013. pp 370-371. Radium Carbonate :Ra2+ + CO32- → RaCO3 Because of the very low solubility of this salt, it will form a white precipitate. Reactions Radium carbonate can be used to produce radium nitrate and other radium salts: :RaCO3 + 2HNO3 → Ra(NO3)2 + H2O + CO2 References Radium compounds Carbonates {{Inorganic-chemistry-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barium Nitrate
Barium nitrate is the inorganic compound with the chemical formula Ba( NO3)2. It, like most barium salts, is colorless, toxic, and water-soluble. It burns with a green flame and is an oxidizer; the compound is commonly used in pyrotechnics. Manufacture, occurrence, and reactions Barium nitrate is manufactured by two processes that start with the main source material for barium, the carbonate. The first involves dissolving barium carbonate in nitric acid, allowing any iron impurities to precipitate, then filtered, evaporated, and crystallized. The second requires combining barium sulfide with nitric acid. It occurs naturally as the very rare mineral nitrobarite. At elevated temperatures, barium nitrate decomposes to barium oxide: : 2Ba(NO3)2 → 2BaO + 4NO2 + O2 Applications Barium nitrate is used in the production of BaO-containing materials. Military Although no longer produced, Baratol is an explosive composed of barium nitrate, TNT and binder; the high density of barium ni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barium Nitrate
Barium nitrate is the inorganic compound with the chemical formula Ba( NO3)2. It, like most barium salts, is colorless, toxic, and water-soluble. It burns with a green flame and is an oxidizer; the compound is commonly used in pyrotechnics. Manufacture, occurrence, and reactions Barium nitrate is manufactured by two processes that start with the main source material for barium, the carbonate. The first involves dissolving barium carbonate in nitric acid, allowing any iron impurities to precipitate, then filtered, evaporated, and crystallized. The second requires combining barium sulfide with nitric acid. It occurs naturally as the very rare mineral nitrobarite. At elevated temperatures, barium nitrate decomposes to barium oxide: : 2Ba(NO3)2 → 2BaO + 4NO2 + O2 Applications Barium nitrate is used in the production of BaO-containing materials. Military Although no longer produced, Baratol is an explosive composed of barium nitrate, TNT and binder; the high density of barium ni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radium Oxide
Radium is a chemical element with the symbol Ra and atomic number 88. It is the sixth element in group 2 of the periodic table, also known as the alkaline earth metals. Pure radium is silvery-white, but it readily reacts with nitrogen (rather than oxygen) upon exposure to air, forming a black surface layer of radium nitride (Ra3N2). All isotopes of radium are radioactive, the most stable isotope being radium-226 with a half-life of 1600 years. When radium decays, it emits ionizing radiation as a by-product, which can excite fluorescent chemicals and cause radioluminescence. Radium, in the form of radium chloride, was discovered by Marie and Pierre Curie in 1898 from ore mined at Jáchymov. They extracted the radium compound from uraninite and published the discovery at the French Academy of Sciences five days later. Radium was isolated in its metallic state by Marie Curie and André-Louis Debierne through the electrolysis of radium chloride in 1911. In nature, radium is found ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radium Carbonate
Radium carbonate is a compound of radium, carbon, and oxygen. This salt is a poisonous, radioactive, Amorphous solid, amorphous, white powder that is used in medicine. It is notable for being more soluble than barium carbonate, unlike other Radium#Compounds, radium compounds. Even though it is insoluble in water, it is soluble in dilute acids and concentrated ammonium carbonate. Preparation Radium carbonate can be produced by using Ra2+ ions and carbonate:Richard C. Ropp. Encyclopedia of the Alkaline Earth Compounds. Elsevier, 2013. pp 370-371. Radium Carbonate :Ra2+ + CO32- → RaCO3 Because of the very low solubility of this salt, it will form a white precipitate. Reactions Radium carbonate can be used to produce radium nitrate and other radium salts: :RaCO3 + 2HNO3 → Ra(NO3)2 + H2O + CO2 References Radium compounds Carbonates {{Inorganic-chemistry-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radium Sulfate
Radium sulfate (or radium sulphate) is an inorganic compound with the formula RaSO4 and an average molecular mass of 322.088 g/mol. This salt is the least soluble of all known sulfate salts. It was formerly used in radiotherapy and smoke detectors, but this has been phased out in favor of less hazardous alternatives. Properties Radium sulfate crystallises in a solid in the same structure as barium sulfate. It forms crystals in the orthorhombic crystal system, with a unit cell of dimensions ''a'' = 9.07 ''b''=5.52 and ''c'' = 7.28 Å. The unit cell volume is 364 Å3. Distance from the radium ion to oxygen is 2.96 Å and the sulfur to oxygen bond length in the sulfate ion is 1.485 Å. In this compound the ionic radius of the radium ion is 1.66 Å, and it is in ten coordination. Radium sulfate can form solid solutions with the sulfates of strontium, barium or lead. References {{radium compounds Radium compounds Sulfates ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nitric Acid
Nitric acid is the inorganic compound with the formula . It is a highly corrosive mineral acid. The compound is colorless, but older samples tend to be yellow cast due to decomposition into oxides of nitrogen. Most commercially available nitric acid has a concentration of 68% in water. When the solution contains more than 86% , it is referred to as ''fuming nitric acid''. Depending on the amount of nitrogen dioxide present, fuming nitric acid is further characterized as red fuming nitric acid at concentrations above 86%, or white fuming nitric acid at concentrations above 95%. Nitric acid is the primary reagent used for nitration – the addition of a nitro group, typically to an organic molecule. While some resulting nitro compounds are shock- and thermally-sensitive explosives, a few are stable enough to be used in munitions and demolition, while others are still more stable and used as pigments in inks and dyes. Nitric acid is also commonly used as a strong oxidizing agen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radium Compounds
Radium compounds are compounds containing the element radium (Ra). Due to radium's radioactivity, not many compounds have been well characterized. Solid radium compounds are white as radium ions provide no specific coloring, but they gradually turn yellow and then dark over time due to self-radiolysis from radium's alpha decay.Kirby et al., p. 4 Insoluble radium compounds coprecipitate with all barium, most strontium, and most lead compounds.Kirby et al., p. 8 Oxides and hydroxides Radium oxide (RaO) has not been characterized well past its existence, despite oxides being common compounds for the other alkaline earth metals. Radium hydroxide (Ra(OH)2) is the most readily soluble among the alkaline earth hydroxides and is a stronger base than its barium congener, barium hydroxide.Kirby et al., pp. 4–8 It is also more soluble than actinium hydroxide and thorium hydroxide: these three adjacent hydroxides may be separated by precipitating them with ammonia. Halides Radium fluo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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