Boron
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BoronBoron forms brilliant transparent crystals, nearly as hard as diamond. The compound boron carbide, B4C, is the hardest substance known next to diamond. It has found extensive use as an abrasive and for the manufacture of vessels for grinding very hard substances. Boric acid, H3BO3, is a very weak acid which is used in medicine as a mild antiseptic. Boric acid is a white crystalline solid which is found in nature in some volcanic steam jets in central Italy. It is volatile enough to be carried along by the steam. Vast deposits of boron are found in California in the form of the minerals borax (sodium tetraborate decahydrate, Na2B4O7. 10H2O), kernite (sodium tetraborate tetrahydrate, Na2B4O7. 4H2O), and colemanite (calcium hexaborate pentahydrate, Ca2B6O11. 5H2O). The boron compound hulsite contains iron, tin and It is also found with calcium in the silicate minerals danburite, datolite and Howlite. Boron appears with lithium and sodium in the silicate elbaite . It appears with magnesium in the fibrous mineral Szaibelyite and in the mineral boracite. Boron is found in the sulfate mineral Charlesite. With beryllium, boron forms the oxide mineral Hambergite.
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Index Periodic Table Chemistry concepts Reference Pauling | ||
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Boron Nuclear Data
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Index Periodic Table Chemistry concepts Reference Rohlf | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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