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Lecture 2

Lecture 2 - Minerals

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Department
Earth Sciences
Course
Earth Sciences 1022A/B
Professor
Stephen R Hicock
Semester
Fall

Description
Earth ScienceLecture 2 MineralsStudy of mineralsmineralogyDefinition Solid chemical compound found in natureAlmost 4000 types of minerals only about 20 are commonTypes of MineralsSilicates4SiliconOxygen tetrahedron SiO pg 494AnionNegativeCationPositiveBuilding block for all silicatesCommon Silicate MineralsFerromagnesium dark silicatesOlivine single tetrahedra bonded to 22Fe Mg ionsSee diagram in agendaPyroxene single chains of tetrahedral 90 cleavageWill break where the weaker bonds are ionicbetween chains pg 53Amphibole double chains 120Diagram in agenda pg 53Biotite black mica tetrahedral sheets with perfect basal
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