Gypsum
LAVA gypsum is extracted in Altsi, Sitia, Crete; it consists of hydrated calcium sulphate and anhydrite and it is intended for exclusive use by the cement industry in Greece and abroad.
LAVA gypsum quality specifications are as follows:
| Purity (in its CaSO4.2H2O+CaSO4 form) |
> 88% |
| Hydrated Calcium Sulphate (CaSO4.2H2O) |
< 35% |
| Anhydrite (CaSO4) |
> 53% |
| Sulphate content (SO3) |
> 47.5% |
| Moisture |
< 3% |
| Crystalline water content |
< 7.3% |