(Ar. Buraq, Pers. Burah) Boron compounds have been known for thousands of years, but the element was not discovered until 1808 by Sir Humphry Davy of England and by Gay-Lussac and Thenard of France. The element is not found free in nature, but occurs as orthoboric acid usually in certain volcanic spring waters and as borates in boron and colemantie. Ulexite, another boron mineral, is interesting as it is nature's own version of "fiber optics." Important sources of boron are the ore rasorite (kernite) and tincal (borax ore). Both of these ores are found in the Mohave Desert. Tincal is the most important source of boron from the Mohave. Extensive borax deposits are also found in Turkey. Boron exists naturally as 19.78% 10B isotope and 80.22% 11B isotope. High-purity crystalline boron may be prepared by the vapor phase reduction of boron trichloride or tribromide with hydrogen on electically heated filaments. The impure or amorphous, boron, a brownish-black powder, can be obtained by heating the trioxide with magnesium powder. Boron of 99.9999% purity has been produced and is available commercially. Elemental boron has an energy band gap of 1.50 to 1.56 eV, which is higher than that of either silicon or germanium. Optical characteristics include transmitting portions of the infrared. Boron is a poor conductor of electricity at room temperature but a good conductor at high temperature. Amorphous boron is used in pyrotechnic flares to provide a distinctive green color, and in rockets as an igniter. By far the most commercially important boron compound in terms of dollar sales is Na2B4O7.5H2O. This pentahydrate is used in very large quantities in the manufacture of insulation fiberglass and sodium perborate bleach. Boric acid is also an important boron compound with major markets in textile products. Use of borax as a mild antiseptic is minor in terms of dollars and tons. Boron compounds are also extensively used in the manufacture of borosilicate glasses. Other boron compounds show promise in treating Arthritis. The isotope boron-10 is used as a control for nuclear reactors, as a shield for nuclear radiation, and in instruments used for detecting neutrons. Boron nitride has remarkable properties and can be used to make a material as hard as diamond. The nitride also behaves like an electrical insulator but conducts heat like a metal. It also has lubricating properties similar to graphite. The hydrides are easily oxidized with considerable energy liberation, and have been studied for use as rocket fuels. Demand is increasing for boron filaments, a high-strength, lightweight material chiefly employed for advanced aerospace structures. Boron is similar to carbon in that it has a capacity to form stable covalently bonded molecular networks. Carbonates, metalloboranes, phosphacarboranes, and other families comprise thousands of compounds. Crystalline boron (99%) costs about $5/g. Amorphous boron costs about $2/g. (Ar. Buraq, Pers. Burah) Boron compounds have been known for thousands of years, but the element was not discovered until 1808 by Sir Humphry Davy of England and by Gay-Lussac and Thenard of France. The element is not found free in nature, but occurs as orthoboric acid usually in certain volcanic spring waters and as borates in boron and colemantie. Ulexite, another boron mineral, is interesting as it is nature's own version of "fiber optics." Important sources of boron are the ore rasorite (kernite) and tincal (borax ore). Both of these ores are found in the Mohave Desert. Tincal is the most important source of boron from the Mohave. Extensive borax deposits are also found in Turkey. Boron exists naturally as 19.78% 10B isotope and 80.22% 11B isotope. High-purity crystalline boron may be prepared by the vapor phase reduction of boron trichloride or tribromide with hydrogen on electically heated filaments. The impure or amorphous, boron, a brownish-black powder, can be obtained by heating the trioxide with magnesium powder. Boron of 99.9999% purity has been produced and is available commercially. Elemental boron has an energy band gap of 1.50 to 1.56 eV, which is higher than that of either silicon or germanium. Optical characteristics include transmitting portions of the infrared. Boron is a poor conductor of electricity at room temperature but a good conductor at high temperature. Amorphous boron is used in pyrotechnic flares to provide a distinctive green color, and in rockets as an igniter. By far the most commercially important boron compound in terms of dollar sales is Na2B4O7.5H2O. This pentahydrate is used in very large quantities in the manufacture of insulation fiberglass and sodium perborate bleach. Boric acid is also an important boron compound with major markets in textile products. Use of borax as a mild antiseptic is minor in terms of dollars and tons. Boron compounds are also extensively used in the manufacture of borosilicate glasses. Other boron compounds show promise in treating arthritis. The isotope boron-10 is used as a control for nuclear reactors, as a shield for nuclear radiation, and in instruments used for detecting neutrons. Boron nitride has remarkable properties and can be used to make a material as hard as diamond. The nitride also behaves like an electrical insulator but conducts heat like a metal. It also has lubricating properties similar to graphite. The hydrides are easily oxidized with considerable energy liberation, and have been studied for use as rocket fuels. Demand is increasing for boron filaments, a high-strength, lightweight material chiefly employed for advanced aerospace structures. Boron is similar to carbon in that it has a capacity to form stable covalently bonded molecular networks. Carbonates, metalloboranes, phosphacarboranes, and other families comprise thousands of compounds. Crystalline boron (99%) costs about $5/g. Amorphous boron costs about $2/g.
Boron itself does not have a distinctive smell. However, compounds containing boron can have various odors depending on their specific chemical structure.
Boron has a unique crystal structure called rhombohedral boron, which consists of B12 icosahedra linked together in a three-dimensional network without a regular repeating pattern.
Boron trifluoride has a trigonal planar structure, with the boron atom at the center and three fluorine atoms surrounding it in a flat, triangular arrangement. The molecule has a total of four electron pairs around the boron atom, including three bonding pairs and one lone pair.
The Lewis dot structure of boron has three valence electrons represented as dots around the Boron atom symbol. Boron is in Group 13 of the periodic table, so it typically forms three covalent bonds in compounds.
Boron has a rombohedral crystalline structure.
Boron itself does not have a distinctive smell. However, compounds containing boron can have various odors depending on their specific chemical structure.
Boron has a unique crystal structure called rhombohedral boron, which consists of B12 icosahedra linked together in a three-dimensional network without a regular repeating pattern.
Boron trifluoride has a trigonal planar structure, with the boron atom at the center and three fluorine atoms surrounding it in a flat, triangular arrangement. The molecule has a total of four electron pairs around the boron atom, including three bonding pairs and one lone pair.
The Lewis dot structure of boron has three valence electrons represented as dots around the Boron atom symbol. Boron is in Group 13 of the periodic table, so it typically forms three covalent bonds in compounds.
Boron has a rombohedral crystalline structure.
The Lewis structure for boron dichloride (BCl2) consists of one boron atom in the center bonded to two chlorine atoms. Boron has 3 valence electrons and chlorine has 7 valence electrons, so boron forms 3 single bonds with each chlorine to complete its octet and achieve stability.
Yes, boron can conduct heat due to its unique crystalline structure that allows for the transfer of thermal energy through its atomic lattice. However, boron's thermal conductivity is lower compared to many metals and other elements like carbon.
Boron is a chemical element with its own unique properties, such as low density and high strength. It differs from the materials it is found in, like borax or boron carbide, which are compounds that contain boron along with other elements. The atomic structure and characteristics of boron set it apart from the materials that contain it.
Boron itself is a non-metallic element and typically does not have luster. However, certain boron compounds may exhibit luster depending on their specific properties and structure.
Boron does not contain DNA as it is a chemical element and not a biological molecule. DNA is made up of nucleotides containing adenine, thymine, cytosine, and guanine, which are not present in boron.
Boron is a dark, almost black solid at room temperature and pressure. It can exhibit various allotropes, but typically appears as amorphous or crystalline dark brown or black powder.
a rod like structure