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cristobalite::noun | Spocien Dictionary
| Type | Words |
|---|---|
| Type of | mineral |
Examples of cristobalite
cristobalite
The groundmass contains interstitial quartz or tridymite or cristobalite.
From the en.wikipedia.org
The main 3 polymorphs are quartz, cristobalite, and tridymite.
From the en.wikipedia.org
Cristobalite, which is shown here in this magnified view, is found on Earth in volcanic lava flows.
From the sciencedaily.com
The ash also contained large amounts of cristobalite, a form of silica and a known hazard which can cause silicosis.
From the sciencedaily.com
Other phases, e.g. the higher-temperature phases tridymite and cristobalite, are not significant for oscillators.
From the en.wikipedia.org
Thus although tridymite and cristobalite are common minerals in ignimbrites, they may not be primary magmatic minerals.
From the en.wikipedia.org
The crystals, called cristobalite and tridymite, are known to reside in comets, in volcanic lava flows on Earth, and in some meteorites that land on Earth.
From the sciencedaily.com
Note also that both high temperature minerals, cristobalite and tridymite, have both a lower density and index of refraction than quartz.
From the en.wikipedia.org
Commonly in most felsic ignimbrites the quartz polymorphs cristobalite and tridymite are usually found within the welded tuffs and breccias.
From the en.wikipedia.org
- A white mineral consisting of silica; found in volcanic rocks
- The mineral cristobalite is a high-temperature polymorph of quartz, meaning that it is composed of the same chemistry, SiO2, but has a different structure. Both quartz and cristobalite are polymorphs with all the members of the Quartz Group which also include coesite, tridymite and stishovite. ...
- Crystalline form of silica that has a high expansion and contraction rate. (2)
- Simplest crystallographic form of SiO2.
- A crystalline form of silica formed at temperatures above Cone 9. Cristobalite undergoes an inversion like Quartz, but at the lower temperature of 439F, and with a much higher volumetric change of 3%.
- An allotropic form of crystalline silica used in dental casting investments
