正长石

Latites contain plagioclase feldspar (andesine or oligoclase) as large, single crystals (phenocrysts) in a fine-grained matrix of orthoclase feldspar and augite.

安粗岩中含斜长石（中长石或奥长石），是在正长石和普通辉石组成基质中大单晶体（斑晶）。

The feldspar group contains tectosilicate minerals with similar properties, including orthoclase, albite and labradorite. Feldspars make up more than 60% of the upper crust of the earth.

长石系列含网状矽酸盐矿物并且有相似,括正长石,钠长石以及拉长石.长石构成了60%上层地壳.