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Boron

Boron • Metalloid

Primary XPS region: B1s
Overlapping regions: Si2s plasmon, P2s, Zr3d
Binding energies of common chemical states:

Chemical state Binding energy / eV
B elemental 187.2
ZrB2 187.8
B sub-oxide[1] 188.6
Li2B4O7 192.5

Charge referenced to adventitious C1s peak at 284.8eV

Experimental Information

Interpretation of XPS Spectra

General comments

References

 



crystal structureAbout This Element

Symbol: B
Date of Discovery: 1808
Name Origin: Arabic buraq
Appearance: brownish
Discoverer: Sir Davy, et al.
Obtained From: kernite

Melting Point: 2349 K
Boiling Point: 4200 K
Density[kg/m3]: 2460
Molar Volume: 4.39 × 10-6 m3/mol
Protons/Electrons: 5
Neutrons: 6
Shell Structure: 2,3
Electron Configuration: [He]2s22p1
Oxidation State: 3
Crystal Structure: Rhombohedral

Although compounds of boron have been known for thousands of years, the element
itself was not isolated until Sir Humphry Davy, Gay-Lussac and L.J. Thenard isolated it to about 50% purity in 1808. Jöns Jacob Berzelius later identified boron as an element in 1824 and American chemist, W. Weintraub, produced pure boron for the first time in 1909. Boron is not found in its elemental form in nature, but is found in compounds. Compounds of boron have many applications. They are used in making insulating fiberglass, sodium perborate bleach, pyrotechnic flares, and making high-strength, lightweight materials primarily important for advanced aerospace structures.

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