Difference between revisions of "Tridymite"
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== Description == | == Description == | ||
| − | A naturally occurring vitreous phase of pure silica. Tridymite is found as small crystals in siliceous volcanic rocks. It is not as common as quartz, but quartz will convert to tridymite at 870C with a 16.2% increase in volume. | + | A naturally occurring vitreous phase of pure [[silica]]. Tridymite is found as small crystals in siliceous volcanic rocks. It is not as common as quartz, but quartz will convert to tridymite at 870C with a 16.2% increase in volume. |
| − | == | + | ==Physical and Chemical Properties== |
| − | Soluble in boiling sodium carbonate solution | + | Soluble in boiling [[sodium carbonate]] solution |
{| class="wikitable" | {| class="wikitable" | ||
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|- | |- | ||
! scope="row"| Density | ! scope="row"| Density | ||
| − | | 2.28-2.30 | + | | 2.28-2.30 g/ml |
|} | |} | ||
[[Category:Materials database]] | [[Category:Materials database]] | ||
Latest revision as of 12:07, 16 June 2022
Description
A naturally occurring vitreous phase of pure Silica. Tridymite is found as small crystals in siliceous volcanic rocks. It is not as common as quartz, but quartz will convert to tridymite at 870C with a 16.2% increase in volume.
Physical and Chemical Properties
Soluble in boiling Sodium carbonate solution
| Composition | SiO2 |
|---|---|
| Mohs Hardness | 7 |
| Density | 2.28-2.30 g/ml |