Listing ID #391429
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| Color | Clear (in pure form) |
|---|---|
| Crystal habit | 6-sided prism ending in 6-sided pyramid (typical) |
| Crystal System | trigonal |
| Cleavage | None |
| Fracture | Conchoidal |
| Moh's scale hardness | 7- Lower in impure varieties |
| Luster | Vitresous |
| 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)C |
| Boilling Point | 223oC |
| Solubllity | H2O Insoluble |
| Type | Super Snow White | Semi | General |
|---|---|---|---|
| SiO2 | 9 8.30% ( ± 0 0 . 2 0 % ) | 9 9.80% ( ± 00.20%) | 9 6.50% (± 0 0.30% |
| AbO3 | 0 0.03% <± 0 0.05%) | 0 0.50% ( ± 0 0.10%) | 0 0.80% ( ± 0 0 . 1 0 % ) |
| Fe2O3 | 0 0.05% ( m a x ) | 0 0.085% ( m a x ) | 0 0.20% ( max) |
| K2O | 25 p p m ( m a x ] | 00.001% (max) | 0 0.20% ( ± 0 0.05%) |
| Na2O | 40 p p m (max) | 00.001% (max) | 00.09% (max) |
| TiO2 | Nil | Traces | Traces |
| Lol @ 1000C | 0.05% | 0.10% | 0.10% |
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