1. Nesosilicates: These are single tetrahedra (SiO4)4- linked together by cations. Examples include olivine, garnet, and zircon.

2. Sorosilicates: These are double tetrahedra linked by a shared oxygen atom. Examples include epidote and hemimorphite.

3. Cyclosilicates: These consist of rings of tetrahedra, sharing two oxygen atoms each. Examples include beryl and tourmaline.

4. Inosilicates: These have chains of tetrahedra, sharing two oxygen atoms each. Examples include pyroxene and amphibole.

5. Phyllosilicates: These have sheets of tetrahedra, sharing three oxygen atoms each. Examples include mica, clay minerals, and talc.

6. Tectosilicates: These have a three-dimensional framework of tetrahedra, sharing all four oxygen atoms. Examples include quartz, feldspar, and zeolites.

It's important to remember that these are just the main structures. There are many variations within each group, as well as some silicate minerals that don't fit neatly into any of these categories.