Nonradioactive isotope of boron of mass number 10.| Properties: |
| Has marked capacity for absorbing slow neutrons, emitting a high-energy α-particle in the process. |
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| Derivation: |
| Constitutes approximately 19% of natural boron. |
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| Available forms: |
| Crystalline powder, dry amorphous powder, colloidal suspension of dry amorphous powder in oil; in boron trifluoride–calcium fluoride, in potassium borofluoride, in borontrifluoride ethyl etherate, in boric acid. |
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| Use: |
| Neutron counter, radiation shielding (in the form of boral), medicine. |
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