GEO 303 Lecture Notes - Lecture 3: Nonmetal, Magnetochemistry, Feldspar
10 May 2016
School
Department
Course
Professor
Document Summary
Geo minerals lecture: chapter 3 (thurs: finish 3, start 5) bring book to lab. Three layer earth: earth was struck multiple times by objects, initially the earth was a giant ball of molten material. After a while, planetary differentiation occurred, which separated materials by their weight. Why the core is made of iron and nickel, lighter material goes to the surface, which forms minerals: minerals form because of different chemical reactions. The solid earth- made up of rocks: rock-can be an aggregate of minerals and non-minerals, doesn"t have to be specific. Minerals: minerals: naturally occurring substance that is a solid and inorganic representable by a definite chemical formula, and an ordered atomic structure, quartz: has a definite composition (sio2) So does olivine (mg, fe) 2sio4 (me,fe): can have either one, solid solution, doesn"t have a fixed composition but varies between defined limits: chemistry determined by element availability and charge balance, charge balance: chemistry determined by element availability.
