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Unformatted text preview: =mineral QUARTZ-fixed composition-shape (external/internal)-perfect shapes are results of arrangement of atoms and space lattice (3d arrangement) ex:salt-minerals with internal symmetry=crystals/amorphous-sometimes a certain compound can occur as 2 or more species of crystals=polymorphism how do we know about internal geometry of atoms in crystals?-Braggs law-fixed distance between atomic planes-by using braggs law we can measure the distance between atomic planes and classify ALL minerals-internal arrangement of atoms is often reflected in external shape crystal-diameter of an atom~10 ^-8 how many atoms can u fit in a 1 cm cube?ON QUIZ 1...
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This note was uploaded on 03/30/2008 for the course GEOS 1004 taught by Professor Aksinha during the Fall '08 term at Virginia Tech.
- Fall '08