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Classifications |
Alternate Names | None |
Names of Allotropes | AlphaRhombohedralBoron, BetaRhombohedralBoron, AlphaTetragonalBoron |
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Block | p |
Group | 13 |
Period | 2 |
Series | Metalloid |
Electron Configuration | [He]2s22p1 |
Color | Black |
Discovery | 1808 in France and The United Kingdom |
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Gas phase | N/A |
CAS Number | CAS7440-42-8 |
CID Number | |
RTECS Number | |
Electrical properties |
Electrical Type | Insulator |
Electrical Conductivity | 0.0001 S/m |
Resistivity | 10000 m Ω |
Superconducting Point | N/A |
Magnetic properties |
Magnetic Type | Diamagnetic |
Curie Point | N/A |
Mass Magnetic Susceptibility | -8.7×10-9 m3/Kg |
Molar Magnetic Susceptibility | -9.41×10-11 m3/mol |
Volume Magnetic Susceptibility | -0.0000214 |
Abundances |
% in Universe | 1×10-7% |
% in Sun | 2×10-7% |
% in Meteorites | 0.00016% |
% in Earth's Crust | 0.00086% |
% in Oceans | 0.00044% |
% in Humans | 0.00007% |
Atomic dimensions and structure |
Atomic Radius | 87 pm |
Covalent Radius | 85 pm |
Van der Waals Radius | N/A |
Crystal Structure | Simple Trigonal |
Lattice Angles | 1.01334, 1.01334, 1.01334 |
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Lattice Constants | |
Space Group Name | R_
3m |
Space Group Number | 166 |
Nuclear Properties |
Half-Life | Stable |
Lifetime | Stable |
Decay Mode | N/A |
Quantum Numbers | 2P1/2 |
Neutron Cross Section | 760 |
Neutron Mass Absorption | 2.4 |
Known Isotopes | 6B, 7B, 8B, 9B, 10B, 11B, 12B, 13B, 14B, 15B, 16B, 17B, 18B, 19B |
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Stable Isotopes | |
Isotopic Abundances | |
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