| Color…………………………… |
white |
| Refractive index………………... |
1.5 |
| Free Moisture maximum……….. |
0.5 |
| pH(of water slurry)……………... |
6.5-8.0 |
| Specific gravity…………………. |
2.2-2.4 |
| Bulk Density……………………. |
As desired but usually in the 2.25lb/ft3 range |
| (loose weight) |
(32-400kg/m3) |
| Mesh sizes available……………. |
As desired 4-8 mesh and finer |
| Softening point………………….. |
1600-2000 F (871-1093 F) |
| Fusion point……………………... |
2300-2450 F (1260-1343 C) |
| Specific Heat…………………….. |
0.2btu/lb F (837J/KG.K) |
| Thermal conductivity…………….. |
27.11 btu.in/h.ft2 F |
| At 75 F (24 C) |
(04-06 w/m.k) |
| Solubility………………………… |
soluble in hot concentrated alkali |
| |
and in HF moderately soluble (<10%) |
|
in 1 N NaOH slightly soluble(<3%) |
|
Mineral acids (1N) very slightly soluble |
|
(<1%) in water orweak acids. |
