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Week: 3. CRYSTAL CHEMISTRY:
Building blocks of minerals. Bonding forces in crystals.
Coordination principle: How building blocks (e.g., Atoms, ions) of minerals are arranged to form crystal structures? What governs this arrangement? Coordination types (12, 8, 6, 4, 3, 2-fold coordinations).
Crystal types, based on their bonds.
Compositional variations in minerals
Silicate structures: The way [SiO4]-4 is bonded to form silicate minerals.
Structure of olivine, pyroxene, amphibole, mica, feldspar, and SiO2 group minerals.
Structural sites in the lattices of these minerals. Examining the ions of which elements can enter into these crystallographic sites. |