minerals - Patterns in Nature: Minerals Geology: Study of...

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Patterns in Nature: Minerals
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Geology: Study of Rocks What’s a rock? A naturally occurring consolidated mixture of minerals or mineral- like substances In short, Rocks are composed of Minerals!
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What’s a Mineral? “A naturally occurring inorganic solid with a regular internal atomic structure and a specific chemical composition.” MUST obey certain conditions! © Jay Schomer 1. Naturally occurring
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Augite Naturally occurring – From the “womb” of nature not formed in the laboratory
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1. Naturally occurring 2. Crystalline substance Crystalline substance -an internal structural framework of atoms (or ions) arranged in a regular geometric pattern.
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Quick Definition: Crystal Single, continuous, uninterrupted, piece of a crystalline solid bounded by flat surfaces These flat surfaces are “ Crystal faces Grow naturally when mineral formed Crystals form in a variety of geometries in shapes, some mundane, others spectacular Controlled by crystal structure - internal framework ( more coming up in 8 slides! ) Quartz Crystal face
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Crystal Structure: Soldiers in Formation
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Crystallography “The study of crystals, including growth, structure and classification by  form” Symmetry Reflection Across a Plane mirror plane
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Crystallography Symmetry Symmetry Axis of Rotation 1-fold, 2-fold,…axis
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Crystallography is based upon the idea of translational, rotational & inversion or mirror, symmetry. It’s all about finding symmetrical relationships across different axes
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Isometric (cubic) Tetragonal Orthorhombic Hexagonal Trigonal Monoclinic
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Is Glass a mineral? Glass not a mineral as it is amorphous Sea Glass from France Stjohnbeachguide.com Amorphous… Without shape Or structure… vs. Same composition as quartz (SiO2), but diff. arrangement
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External form – controlled by internal framework of elements Minerals have an interior “code” Based on their chemical composition That influences interior structure, And external form “DNA” Ex. Hexagonal Quartz…
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2. Crystalline substance 3. Solid Must be a single solid phase that maintains it’s shape indefinitely and does not conform to shape of container. Ice is a mineral;
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This note was uploaded on 04/03/2012 for the course GEOL 100 taught by Professor Neitzke during the Fall '10 term at Rutgers.

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minerals - Patterns in Nature: Minerals Geology: Study of...

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