Other Bonds Covalent Bond Covalent bond Between 2 Nonmetals neither one donates or gives up an electron, They simply Share in outer orbital shell forming Covalent bond Metallic Bond very few electrons in the outer most electron shells. Instead of donating or sharing these electrons are released from the orbital shell and available for a nearby cluster of atoms to use. “floting in a sea of Electrons”
Formulating Compounds SiO 2 (Mg, Fe) 2 SiO 4
2.3 Crystalline Nature of Minerals A crystal is any substance whose atoms are arrange in a regular, periodically repeated pattern. When atoms combine to form minerals they so in organized way that forms a geometric pattern called crystal.
Minerals and Rocks Room 222 ( Geology Building). Geology Building lobby Museum ?
Physical Properties of Minerals 1 Crystal habit (shape) 2) Cleavage & fracture 3) Hardness 4) Specific gravity 5) Color 6) Streak 7) Luster Others (Taste, Reaction to Acid, magnetism. )
Crystal Habit Quartz: elongated crystals Quartz: no characteristic shape
Cleavage & Fracture
Mohs Mineral Hardness Scale
Specific Gravity Quartz 2.7 Au 19
Silicates Si O O O O
2.6 Commercially Important Minerals
2.7 Harmful and Dangerous Roks and Minerals Asbestos. Feldspar Quartz