![]() Sr(OH) 2 is used chiefly for refining beet sugar and stabilizing plastics. It is obtained by combining a strontium salt with a strong base. It exists in anhydrous, monohydrate, or octahydrate form. Strontium hydroxide is a caustic alkali with the chemical formula Sr(OH) 2. It is used mainly for making glass in colour television cathode-ray tubes. It is also obtained from the decomposition of SrCO 3. Strontia is formed when strontium reacts with oxygen. Burning Sr metal in the air produces a mixture of oxides and nitride. Strontium oxide or strontia is a strongly basic oxide with the chemical formula of SrO. ![]() The most common compounds of Sr are given below, Strontium oxide The high value of third ionization energy or closed shell configuration of Sr +2 ion also explains the upper limit of +2 oxidation number or state. These two electrons are uniformly involved together to show uniform bivalency in strontium compounds. Therefore, Sr is characterized by two valence electrons in the 5s orbital outside the noble gas core. The electron configuration of Sr is 5s 2. It can be converted to SrCO 3 by the introduction of carbon dioxide.Ĭommercially, the metal is produced by reducing strontium oxide with aluminium.Ī small scale of Sr metal can also be prepared by electrolysis of a solution of strontium chloride in molten potassium chloride. The black ash may dissolve in water and filter to obtain SrS. In the second process, celestine is roasted with coal to form the dark-colored sulfide.In the first process, the celestine may be directly leached with sodium carbonate solution to form Strontium carbonate. ![]() The mined celestine (SrSO 4) is converted to carbonate by two processes. Strontium is extracted mainly from the mineral celestine. Strontium is an alkaline earth metal that lies between calcium and barium. It is found in group 2 and the period 5 of the periodic table. Both metals adopt face-centered cubic crystal lattices. The crystal structure of strontium is similar to that of calcium. The physical and chemical properties of Sr are similar to that of vertical neighbor’s calcium and barium in the periodic table. It is harder than alkali metals due to the presence of two valence electrons for metallic bonding. Strontium is a soft, silver-white, and highly chemically reactive metal that forms a dark oxide layer when it is exposed to air. Due to high- energy radiation, strontium-90 may be used to generate electric current for space vehicles, remote weather stations, and navigation buoys. In radiopharmaceuticals, 89Sr is used for the treatment of bone cancer.ĩ0Sr is a highly radioactive isotope of strontium. It is the basis of Rb-Sr dating.Ĩ9Sr and 90Sr are the two important isotopes of metal. Beta decay of 87Rb gives pure 87Sr in some minerals. The abundance of these isotopes increases with increasing mass numbers. ![]() It has four stable natural isotopes like 84Sr, 86Sr, 87Sr, and 88Sr. The supplement SrCl 2 is used in medicine for the treatment of tooth sensitivity, osteoporosis, osteoarthritis, and prostate cancer.Ĭhina is now the leading world producer of strontium but it may also be found in Spain, Mexico, Argentina, Morocco, and United States. Most of the strontium found in the human body is concentrated in our bones. Like calcium, a very small concentration of Sr is found in groundwater and seawater. Due to high chemical reactivity, it only exists in nature when combined to form minerals. Strontium is the 15th most abundant element on Earth found mainly in the minerals celestite (SrSO 4) and strontianite (SrCO 3). The metal was first isolated in 1808 by Humphry Davy using the process of electrolysis. It was discovered by the name of the Scottish village of Strontian. Strontium was discovered in the ores of the lead mines found in the Scottish village of Strontian. Like other alkaline earth metals, strontium also shows a +2 oxidation number or state. It is more reactive than magnesium and calcium due to the larger size of the Sr atom. It is chemically similar to that magnesium, calcium, and barium.
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