An alkaline igneous rock with alkaline feldspar and feldspathoid as the main minerals. The main minerals are alkaline feldspar (65% -70%) and nepheline (15% -25%), containing alkaline dark minerals aegirine augite, aegirine, sodium iron amphibole, etc. There are many kinds of accessory minerals, including magnetite, ilmenite, apatite, zircon, sphene, etc. Grey, light green, light yellow brown. Medium to coarse grained or granite like structure. Massive, banded or gneissose structure. Most of them are produced as rock beds and rock stocks. It often forms a complex with alkaline syenite, alkaline granite, alkaline gabbro, etc. Its related minerals include niobium, tantalum, rare earth, zirconium and uranium. It is also an important non-metallic mineral, which can be used as raw material for preparing ceramics, glass, rock wool and assimilating radioactive elements; It can also be used as the filler of coatings and rubber. Those with beautiful color can be used as building decoration materials. It can also be used to extract aluminum and potassium and prepare Portland cement.
Natural materials and products -> Mineral materials