Scandium dodecaboride
From Infogalactic: the planetary knowledge core
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| Names | |
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| IUPAC name
scandium dodecaboride
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| Properties | |
| ScB12 | |
| Molar mass | 174.69 g/mol |
| Structure | |
| Tetragonal, tI26 | |
| I4/mmm, No. 139 | |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Scandium dodecaboride is a refractory metal boride.
Synthesis
ScB12 is formed by mixing a 7:1 ratio of boron powder and scandium oxide powder, heating to 2500 °C with a plasma torch or similar, quenching in cold water and washing with concentrated hydrochloric acid.[1]
Crystallography
ScB12 was originally reported as having a cubic structure,[2] later studies showed it to have tetragonal structure (unit cell with a=522pm, c=735pm).[1] More recently it has been shown that there is indeed a cubic form but that it requires stabilization.[3]
