霞石正长岩 nepheline-syenite 一种深成碱性岩。灰、浅绿、浅黄褐色。中粗粒。具似花岗结构。主要由碱性长石（65%～70%）、霞石（15%～25%）和碱性暗色矿物（10%～15%）组成。碱性长石主要为正长石、歪长石 、微斜长石和钠长石；碱性暗色矿物以霓辉石、霓石、钠铁闪石、富铁钠闪石为主。辉石类矿物的环带构造发育。
长石；白榴石；霞石及霞石正长岩；萤石(氟石)。
Feldspar; leucite; nepheline and nepheline syenite; fluorspar.
以霞石正长岩为代表，研究了含碱集料对碱-硅酸反应膨胀的影响。
As a representative alkaline aggregate, nepheline was selected and the effect of it on the expansion of alkali-silica reaction was studied.
以霞石正长岩取代长石，按照浮法玻璃的成份制备配合料并熔制玻璃。
Using nepheline syenite as a substitute for feldspar, the batch mixtures were prepared on a composition of float glass and are melted into glasses.
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