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Properties
| General
|
| Name
| Boron nitride
|
| Chemical formula
| B N
|
| Appearance
| White solid
|
| Physical
|
| Formula weight
| 24.8 amu
|
| Boiling point
| sublimes at 3273 K (3000 °C)
|
| Density
| 2.2 ×103 kg/ m3
|
| Crystal structure
| zinc blende or layered
|
| Solubility
| insoluble
|
| Thermochemistry
|
| ΔfH0gas
| 476.98 kJThe joule (symbol J also called newton metre or coulomb volt is the SI unit of energy and work. The unit is pronounced to rhyme with "tool", and is named in honour of the physicist James Prescott Joule (1818-1889). 1 joule 1 N · 1 m 1 newton · 1 metre 1 k/ molThe mole (symbol: mol) is one of the seven SI base units and is commonly used in chemistry. It measures the amount of substance of a system and is defined as the amount of substance that contains as many elementary entities as there are atoms in exactly 0
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| ΔfH0solid
| -250.91 kJ/mol
|
| S0gas, 1 barIn chemistry, the standard molar entropy is the entropy content of one mole of substance, under conditions of standard temperature and pressure. By comparing the entropies of products and reactants in a chemical reaction, we can determine whether the reac
| 212.36 J/mol·K
|
| S0solid
| 14.77 J/mol·K
|
| Safety
|
| Ingestion
| Classified "not hazardous"
|
| Inhalation
| ?
|
| Skin
| ?
|
| Eyes
| ?
|
| More info
| ?
|
| SIThe International System of Units (symbol: SI (for the French phrase Systeme International d'Unites , is the most widely used system of units. It is used for everyday commerce in virtually every country of the world except the United States, and it is uni units were used where possible. Unless otherwise stated, standard conditions were used.
Disclaimer and references
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Boron nitride is a binary chemical compound, consisting of equal proportions of boron and nitrogen, with composition BN. Structurally, it is isoelectronicWhen an atom, radical, or ion has an equal number of electrons or has the same number of electrons when compared to the atoms of another element, the two species are called isoelectronic . Basically, if two atoms/ions/radicals have the same number of elec to carbon and takes on similar physical forms: a graphite-like one, and a diamond-like one. The latter is one of the hardest materials known, behind diamond and ultrahard fullerite. It is widely used for grinding and as material for tools in industry. Theoretical beta carbon nitride is thought to be harder.
Nitrides
Superhard materials
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