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Lecture 1 (What is a Mineral? (Naturally Occuring, Homogenous, Chemical…

- - - - same structure, varying composition
    - - same mineral, but looks very different
        
        colour might be different
    - - Related by its elemental composition
        
        sulfides have 's' in formula
    - - Similar atomic structures
        
        quartz group are made of SiO4 tetrahedra linked at corners
    - - types of a mineral in a group
    - - same formula, varying atomic structure
  - - - corners share a 'bridging oxygen' (BO)
    - - Isolated tetrahedra are orthosilicates or nesosilicates
      - Two tetrahedra linked by one BO is sorosilicate
      - Cyclosilicates have two BO