felspar

1.Sand Mineral particles consisting mainly of quartz, felspar, and mica, and measuring between 2 and 0.05mm in diameter.

沙：主要由英、长、母等矿物微粒构成，其直径在0.05~2mm之间。

2.In this paper, the research process of the fire - proof calcium silicate board trial - produced with theindustrial tailings - felspar powder is reported.

本文报道了使用工业尾矿长粉试制防火硅酸钙板的研。