Chem composition

• Reasons of variation

  SOLID SOLUTION - two or more end member minerals mix seamlessly, creating continuous range of Composition.

  • SUBSTITUTIONS - ions of similar site and change can replaced each other within the minerals crystal structure
• Non-ferromagnesian silicates (felsic minerals)


  Lighter, low in iron and magnesium, includes feldspar and quartz
• Bromine

  Chlorine

  Iodine.

  Astatine

  Flourine


  Halogen elemnts