tridymite 的定义
Mineralogy.
- a polymorph of quartz occurring in the form of small crystals, commonly twinned, in siliceous volcanic rocks.
更多tridymite例句
- The crystals, called cristobalite and tridymite, swim in clouds around stars just before they begin to form planets.
- When crystalline grains or blebs of quartz occur, we have a quartz-trachyte; when tridymite is abundant, as in the trachyte of Co.
- Spherulites may be regarded as radiate aggregates of such microliths (mostly felspar mixed with quartz or tridymite).