Mineral classification
Download
1 / 23

Mineral Classification - PowerPoint PPT Presentation


  • 180 Views
  • Updated On :
  • Presentation posted in: General

Mineral Classification . In case you haven’t figured it out!. Minerals are classified by chemical composition . 1. Minerals with the same anion or anionic group have unmistakable family resemblances. For example, the carbonates resemble each other more closely than say the minerals of Cu.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha

Download Presentation

Mineral Classification

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Mineral Classification

In case you haven’t figured it out!


Minerals are classified by chemical composition

  • 1. Minerals with the same anion or anionic group have unmistakable family resemblances. For example, the carbonates resemble each other more closely than say the minerals of Cu.

  • 2. They occur together in nature, for example, it is very common to find both calcite and dolomite in the same rocks.

  • 3. It agrees with the naming of inorganic compounds in chemistry.


And at the next level

  • Once minerals have been grouped by chemical composition, they can be further separated into groups on the basis of internal structure.


Native Elements

  • Metals

  • Semi Metals

  • Non Metals


Sulfides

  • Including sulfarsenides; arsenides and tellurides


Sulfosalts

  • In these minerals, As and Sb play a role more akin to metals than anions. Many important Ag minerals are sulfosalts.


Oxides

  • a) simple and multiple where O combines with one or metals (cations)

    • Simple

    • Multiple

  • b) hydroxides with OH- group and H2O molecules


Halides

  • these minerals have Cl, Br, F, and I as anions


Carbonates

  • Based on the carbonate radical

  • Hexagonal; orthorhombic; and monoclinic

  • You have examples of all three!


Nitrates

  • NO3 radical

  • Only 7 known minerals


Borates

  • (BO3)-3 can form polymers--about 100 known minerals

    So are they iso, meso, or aniso desmic?


Phosphates

  • (PO4)-3 are usually hydrous as well


Sulfates

  • (SO4)-2 can be hydrous or anhydrous


Tungstates (WO4)-2

scheelite and wolframite are both ore minerals for W


Silicates (SiO4) -4

  • The most important group of minerals!!

    • Nesosilicates

    • Sorosilicates

    • Cyclosilicates

    • Inosilicates

    • Phyllosilicates

    • Tectosilicates


Why can they form so many structures?

  • Mesodesmic

    • Remember this term?


Nesosilicates


Sorosilicates


Cyclosilicates


Inosilicates


Phyllosilicates


Tectosilicates


What is the best way for you to remember formulas

  • General formulas!!

  • Next time


ad
  • Login