tridymite मीनिंग इन हिंदी

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Silification is prominent and has formed cristobalite and tridymite.
Thus although tridymite and cristobalite are common minerals in ignimbrites, they may not be primary magmatic minerals.
Minerals associated with this include quartz, cristobalite and tridymite, which may all be present in volcanic ash.
The high-temperature minerals, cristobalite and tridymite, have both lower densities and indices of refraction than quartz.
In the older trachytes, secondary quartz is not rare, and probably sometimes results from the recrystallization of tridymite.
Commonly in most felsic ignimbrites the quartz polymorphs cristobalite and tridymite are usually found within the welded tuffs and breccias.
Other phases, e . g . the higher-temperature phases tridymite and cristobalite, are not significant for oscillators.
Quartz is typically rare in trachyte, but tridymite ( which likewise consists of silica ) is by no means uncommon.
Polymorphism can also result from the existence of different ?-quartz, tridymite, cristobalite, coesite, and stishovite.
Quartz has several polymorphs, including tridymite and cristobalite at high temperatures, high-pressure coesite, and ultra-high pressure stishovite.

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