| NN | Card | Specie | Formula | Space Group |
|---|---|---|---|---|
| 1. | 4221 | [1], at 25oC, t-diamond | Si | F d3m |
| 2. | 4222 | [2], at 1300oC | Si | F d3m |
| 3. | 9322 | [3], syn, at 43 Gpa | Si | P 6(3)/mmc |
| 4. | 9323 | [4], syn, at 19.5 Gpa | Si | P 6/mmm |
| 5. | 9324 | [5], syn | Si | I a3 |
| 6. | 9325 | [6], syn, between 13 GPa to 18 GPa | Si | I mma |
| 7. | 9326 | [7], t-diamond | Si | F d3m |