Tridymite
noun
noun ·Rare ·Advanced level
Definitions
Noun
- 1 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. countable, uncountable
- 2 a mineral form of silica wordnet
Etymology
The name refers to the peculiar habit of crystallizing in groups of three individuals.