|
PHYSICAL PROPERTIES |
| Property |
Description |
| Color |
Clear (in pure form) |
Crystal habit |
6-sided prism ending in
6-sided pyramid (typical) |
| Crystal
system |
Trigonal |
| Cleavage |
None |
| Fracture |
Conchoidal |
| Mohs
scale hardness |
7 -
lower in impure varieties |
| Luster |
Vitreous |
| Refractive
index |
1.544-1.553
- Dr +0.009 (B-G interval) |
| Streak |
White |
| Specific
gravity |
2.65
constant; variable in impure
varieties |
| Melting
point |
1650
(±75) 0C |
| Boiling
point |
2230
0C |
| Solubility |
H 2O
insoluble |
| Using
in Glass industry, pain
industry, ceramic industry,
coating . |
CHEMICAL
PROPERTIES |
| Analyte |
SSW |
Semi |
General |
| SiO2 |
99.80% (±
00.20%) |
98.30% (±
00.20%) |
96.50% (±
00.30%) |
| Al2O3 |
00.03% (±
00.05%) |
00.50% (±
00.10%) |
00.80% (±
00.10%) |
| Fe2O3 |
00.05% (max) |
00.085% (max) |
00.20% (max) |
| K2O |
25 ppm (max) |
00.001% (max) |
00.20% (±
00.05%) |
| Na2O |
40 ppm (max) |
00.001% (max) |
00.09% (max) |
| TiO2 |
Nil |
Traces |
Traces |
| LoI @ 10000 C |
00.05% |
00.10% |
00.10% |
|
