Aluminosilicate refers to materials containing anionic Si-O-Al linkages. Commonly, the associate cations are sodium (Na⁺), potassium (K⁺) and protons (H⁺). Such materials occur as minerals, coal combustion products^[1] and as synthetic materials, often in the form of zeolites. Both synthetic and natural aluminosilicates are of technical significance as structural materials, catalysts, and reagents.

Feldspar is a common tectosilicate aluminosilicate mineral made of potassium, sodium, and calcium cations surrounded by a negatively charged network of silicon, aluminium and oxygen atoms.

Many aluminosilicates are synthesized by reactions of silicates, aluminates, and other compounds. They have the general formula (MAlO₂)(SiO₂)_x(H₂O)_y where M⁺ is usually H⁺ and Na⁺. The Si/Al ratio is variable, which provides a means to tune the properties.^[2] Many of these materials are porous and exhibit properties of industrial value.^[3] Naturally occurring microporous, hydrous aluminosilicate minerals are also referred to as zeolites.

• Aluminium silicate
• Geopolymer cement
• Silicate minerals
• Calcium aluminosilicate
• Sodium aluminosilicate
• Gorilla Glass – a type of aluminosilicate glass