Lanthanum disilicide
From Wikipedia, the free encyclopedia
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| Other names
Lanthanum silicide | |
| Identifiers | |
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| Properties | |
| LaSi2 | |
| Molar mass | 195.075 g·mol−1 |
| Appearance | gray crystals |
| Density | 5.05 g/cm3 |
| Melting point | 1,500[1] °C (2,730 °F; 1,770 K) |
| insoluble | |
| Structure | |
| Tetragonal, orthorhombic | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Lanthanum disilicide is a binary inorganic compound of lanthanum metal and silicon with the formula LaSi2. Many other lanthanum silicides are known.[2]
- Combine silicon and lanthanum powders, compress the mixture into solid blocks, and melt under vacuum conditions.[3]
- React lanthanum, silicon, and mercury in a quartz tube at 450 °C for 10–12 hours. Subsequently, eliminate surplus mercury through distillation, followed by annealing the resultant material at 450–600 °C.[3]