Chapter 4 – Minerals
Silicon and oxygen
The silicate minerals in which the backbone is the silica tetrahedron.
A compound is chemically combined to produce a new substance with new properties where a mixture is physically combined, and where each substance retains its original properties.
1) must be a solid
2) must be inorganic
3) must occur naturally
4) atoms must appear in a regular repeating pattern
5) must have a definite chemical composition
Coal is not a mineral because it is organic, produced by the decay of plants. Glass and pearls are other examples.
Silicates (silicon and oxygen)
Iron oxides (iron and oxygen)
Carbonates (carbon and oxygen)
5) fracture / cleavage
A mineral can be a rock, but a rock cannot be a mineral