tridymite
IPA: trˈaɪdʌmaɪt
noun
- (mineralogy) A rare mineral of volcanic rocks that solidified at a high temperature, with the chemical composition silicon dioxide, SiO₂. Tridymite is chemically identical to quartz, but has a different crystal structure. Sometimes contains sodium aluminum silicate, which seems to be expelled when quartz solidifies at lower temperatures.
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Examples of "tridymite" in Sentences
- The groundmass contains interstitial quartz or tridymite or cristobalite.