![]() ![]() However, 90Sr has a lifetime approximately 3 times shorter and has a lower density than 238Pu, another RTG fuel. 90Sr produces about 0.93 watts of heat per gram (it is lower for the grade of 90Sr used in RTGs, which is strontium fluoride). ![]() 90Sr has been used as a power source for RTGs.This localization focuses the radiation exposure on the cancerous lesion. The strontium acts like calcium and is preferentially incorporated into bone at sites of increased osteogenesis. 89Sr is the active ingredient in Metastron, a radiopharmaceutical used for bone pain secondary to metastatic prostate cancer.Strontium oxide is sometimes used to improve the quality of some pottery glazes.One popular brand includes 10% strontium chloride hexahydrate by weight. Strontium chloride is sometimes used in toothpastes for sensitive teeth.Strontium aluminate is used as a bright phosphor with long persistence of phosphorescence.Strontium is also used in fireworks for red colour.However, it is very soft and easily scratches so it is rarely used. Strontium titanate has been cut into gemstones, in particular for its use as diamond simulant.Strontium titanate has an extremely high refractive index and an optical dispersion greater than that of diamond, making it useful in a variety of optics applications.Production of ferrite magnets and refining zinc.Natural strontium is a mixture of four stable isotopes.Īt present the primary use for strontium is in glass for colour television cathode ray tubes. Volatile strontium salts impart a crimson colour to flames, and these salts are used in pyrotechnics and in the production of flares. Finely powdered strontium metal will ignite spontaneously in air. It should be kept under kerosene to prevent oxidation freshly exposed strontium metal rapidly turns a yellowish colour with the formation of the oxide. It burns in air to produce both strontium oxide and strontium nitride, but since it does not react with nitrogen below 380☌ it will only form the oxide spontaneously at room temperature. Strontium is a bright silvery metal that is softer than calcium and even more reactive in water, which strontium decomposes on contact to produce strontium hydroxide and hydrogen gas. The 90Sr isotope is present in radioactive fallout and has a half-life of 28.90 years.ĭue to its extreme reactivity to air, this element occurs naturally only in compounds with other elements, as in the minerals strontianite and celestite. It occurs naturally in the minerals celestite and strontianite. The metal turns yellow when exposed to air. An alkaline earth metal, strontium is a soft silver-white or yellowish metallic element that is highly reactive chemically. Strontium ( IPA: /ˈstrɒntiəm/) is a chemical element in the periodic table that has the symbol Sr and the atomic number 38. ![]()
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