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Unformatted text preview: Isotropic o Liquids, isometric minerals Uniaxial o Hexagonal and tetragonal minerals Biaxial o Orthorhombic, monoclinic, triclininc minerals Birefringence = Nslow- Nfast Birefringence = retardation / thickness 15:11 Readings for next class: 146-151 Refractive indexes in Optic Plane Z- gamma axis pointed up (longest) X- alpha axis pointed to side Y- Beta pointed out towards you 2 optic axes somewhere in optic plane Bxa- splits acute angle, either Z or X Readings for next class: 74-81 15:11 Nucleation Barrier to overcome Free energy system (G) 1 st step in decreasing minerals reactants -> products Delta G G PRODUCTS G REACTANTS For spontaneous reaction need Delta G to be Readings for next class- 186-190...
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This note was uploaded on 09/26/2010 for the course GEO 416k taught by Professor Staff during the Fall '08 term at University of Texas at Austin.
- Fall '08