felspar

1. So too the geologist does well to regard granite as a compound of quartz, felspar, and mica.
   又如地质学家认花岗石是由石英、肉色石、金星石合成的，也是很对的。
2. Development of Fire-Proof Felspar Powder Calcium Silicate Board
   长石粉防火硅酸钙板的研制
3. Through XRD analysis on the single particles, main minerals of the air dust are quartz, felspar, dolomite, calcite, gypsum and barite.
   用X射线衍射和能谱仪对单颗粒矿物作成份分析得知：大气尘的矿物成份主要是石英、长石、白云石、方解石、石膏、重晶石等矿物，以石英为主，其次是伊利石、石膏。

noun

1. any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium

   Synonym:    feldspar