Chemical composition
| Loss of ignition | 2,50% |
| SiO2 | 74,86% |
| AL2O3 | 12,58% |
| TiO2 | 0,06% |
| Fe2O3 | 0,70% |
| CaO | 0,75% |
| MgO | 0,26% |
| Na2O3 | 3,40% |
| K2O | 4,78% |
Facts about Perlite
Physical properties of expanded Europerl Perlite
Colour White
Free water 0,5%
PH (in aqueous solution) 6,5 – 8,0
Density 2200 – 2400 kg/m3
Loose bulk density 40 – 100 kg/m3
Particle size 0 – 6 mm
Softening temperature 1100°C
Melting point 1350°C
Specific heat 837 J/kg °K
Thermal Conductivity λ 10 38 mW/m°C
λ D class 42 mW/m°C
Solubility: Soluble in hot concentrated alkali or HF.
Moderately soluble (<10%) in 1 N NaOH.
Partially soluble (<3%) in acid (1N)
Very little soluble (<1%) in water and weak acids.