NATS 1750 Lecture Notes - Lecture 2: Mica, Schist, Mafic
2 Jun 2016
School
Department
Course
Professor
Document Summary
Requirements of a mineral: naturally occurring, inorganic solid, crystalline structure, represented by chemical formula: ch4: organized arrangement. Acronym form: nicc: natural, inorganic, crystalline, chemical f. Rocks: aggregate of minerals: exception: they can be other things. e. g. limestone. Minerals = mostly compounds: di erent elements that bond together vis a vis electrons. E~ transfer element: has much stronger a nity: electrons transferred, +/- attract, strong bonds = hard, high melt temperature + crystal structure: covalent. E~ sharing: varying properties: e. g. h2o = covalent: metallic. E~ loosely bound and move freely from atom to atom. = highly conductive + easily bendable e. g. silver, gold, steel, pure iron, copper. = always green], some minerals exhibit broad colour range [e. g. quartz: clear, white, yellow, pink], colour varieties = trace impurities. Streak: colour of powder produced by crushing a mineral, scrape (m) on unglazed porcelain. Luster: scattering of light on (m) surface: (i)metallic (ii)nonmetallic: silky, vitreous (glassy), satiny.
