| Purity | 99.5% min |
| Particle size | 0.5-3.0 μm |
| Ignition loss | 1% max |
| K2O+Na2O | 0.05% max |
| S 2+ | 0.05% max |
| Cl- | 0.05% max |
| H2O | 0.5% max |
| Lead Tungstate | Cesium Tungstate | Calcium Tungstate |
| Barium Tungstate | Zirconium Tungstate |
| Cerium Vanadate | Calcium Vanadate | Strontium Vanadate |
| Lead Stannate | Copper Stannate |