| Melting Point | 1900°C (sublimation) |
| Density | 3.2 g/mL |
| Odor | Odorless |
| Color | Gray |
| Formula Weight | 140.28 |
| Physical Form | <1 Micron Powder |
| Chemical Name or Material | Silicon(IV) nitride, alpha-phase |
| Merck Index | 14,8497 |
| Solubility Information | Insoluble water. |
| Assay | (metals basis) |
| Particle Size | <1 Micron |
| Concentration | Si3N4 90% min. (alpha form) |
| 3084099 |
Synonym: silicon nitride, silicon nitride si3n4, unii-qhb8t06idk, qhb8t06idk, silicon iv nitride, alpha phase, trisilicon tetranitride, nierite, nano silicon nitride, silicon iv nitride, silicon nitride, amorphous
