1. Silicates:
* Most abundant group: Make up over 90% of the Earth's crust.
* Composition: Contain silicon (Si) and oxygen (O) in the form of the silicate tetrahedron (SiO₄).
* Subgroups:
* Nesosilicates: Isolated tetrahedra (e.g., olivine, garnet)
* Sorosilicates: Double tetrahedra (e.g., epidote)
* Inosilicates: Single or double chains of tetrahedra (e.g., pyroxene, amphibole)
* Phyllosilicates: Sheets of tetrahedra (e.g., mica, clay minerals)
* Tectosilicates: Three-dimensional frameworks of tetrahedra (e.g., quartz, feldspar)
2. Carbonates:
* Composition: Contain the carbonate ion (CO₃)²⁻.
* Common minerals: Calcite (CaCO₃), dolomite (CaMg(CO₃)₂), magnesite (MgCO₃)
* Found in: Limestone, marble, sedimentary rocks, and shells
3. Oxides:
* Composition: Contain oxygen (O) combined with one or more metals.
* Common minerals: Hematite (Fe₂O₃), magnetite (Fe₃O₄), corundum (Al₂O₃)
* Found in: Ores, soils, and igneous rocks
4. Sulfides:
* Composition: Contain sulfur (S) combined with one or more metals.
* Common minerals: Pyrite (FeS₂), galena (PbS), chalcopyrite (CuFeS₂)
* Found in: Ores, hydrothermal deposits
5. Sulfates:
* Composition: Contain the sulfate ion (SO₄)²⁻.
* Common minerals: Gypsum (CaSO₄·2H₂O), anhydrite (CaSO₄)
* Found in: Evaporites, sedimentary rocks
6. Halides:
* Composition: Contain halogens (e.g., chlorine (Cl), fluorine (F), bromine (Br), iodine (I)) combined with one or more metals.
* Common minerals: Halite (NaCl), fluorite (CaF₂)
* Found in: Evaporites, sedimentary rocks
7. Phosphates:
* Composition: Contain the phosphate ion (PO₄)³⁻.
* Common minerals: Apatite (Ca₅(PO₄)₃(OH,F,Cl))
* Found in: Bones, teeth, sedimentary rocks
8. Native Elements:
* Composition: Consist of a single element.
* Common minerals: Gold (Au), silver (Ag), copper (Cu), diamond (C), sulfur (S)
* Found in: Ores, volcanic rocks, and meteorites
9. Other Groups:
* Organic minerals: Contain carbon-hydrogen bonds (e.g., coal, petroleum)
* Hydroxides: Contain the hydroxide ion (OH)⁻ (e.g., brucite (Mg(OH)₂))
Important Note: This is a simplified classification scheme. There are many other less common mineral groups, and some minerals can fall into multiple groups.
