| Silicates | |
|---|---|
| Silicates Structures | Examples |
Tetrahedra, Double Tetrahedra, Ring, Chain, Sheet |
Quartz - SiO2
Orthoclase - KalSi3O8 Topaz -Al2SiO4(OH, F)2 |
| Nonsilicates | |
|---|---|
| Class | Example |
| Native Elements | Ag, Au, Cu, Fe, Pb |
| Sulfides | Cinnabar (HgS), Galena (PbS), Pyrite (FeS) |
| Oxides | Magnetite (Fe3O4), Corundum (Al2O3) |
| Halides | Fluorite (CaF2), Halite (NaCl) |
| Carbonates | Calcite (CaCO3), Dolomite [Ca, Mg(CO3)2] |
| Borates | Borax [Na2B4O5(OH)4 . 8 H2O] |
| Sulfates | Barite (BaSO4), Gypsum (CaSO4 2 H2O) |
| Tungstate | Wolframite [(Fe, Mn)WO4] |
| Phosphates | Apatite Series [Ca5(PO4)3(F, Cl, OH) |
| Nonsilicates | |
|---|---|
| The nonsilicate mineral groups contain several economically important minerals: | |
| 1 | The oxides (e.g., hematite, ore of iron), sulfides (e.g., sphalerite, ore of zinc; and galena, ore of lead), sulfates, halides, and native elements (e.g., gold and silver). |
| 2 | The more common nonsilicate rock-forming minerals include the carbonate minerals, calcite and dolomite. |
| 3 | Two other nonsilicate minerals frequently found as sedimentary rocks are rock salt (halite) and rock gypsum (gypsum). |
