EAS100 Lecture Notes - Lecture 10: Galena, Feldspar, Clay Minerals

• School: University of Alberta
• Department: Earth and Atmospheric Sciences
• Course: EAS100
• Professor: Korhan Ayranci

Document Summary

Eas 100 - lecture #10 - earth materials. Most are combinations of si and o with the six metals silicate minerals. Atoms that have lost or gained electrons (charged atoms) Bonding in solids typically produces a crystal lattice. Regular arrangement of atoms is responsible for many mineral properties. Governed by the crystal structure and the strength of chemical bonds. 1669: steno discovered that the angle between mineral crystal faces is constant and gives each a distinctive crystal form. 1912: use of x-rays crystals only form when a mineral can grow freely in open space. Specific gravity: ratio of weight of the substance to weight of an equal volume of pure water. Si & o form a strong covalent bond. Varies from white (k, al-rich ) to black (mg, fe-rich) Other sheet silicates are widespread products of weathering. Category of silicates that contain iron and magnesium.