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January 28, 2018 Weekly Geology Guest, Kaolin

January 27, 2018
Kaolinite Mineral
Wolkem India Limited, Swaroop Sagar, Udaipur
Greetings from the Bluff Park Back Porch, way up yonder on Shades Mountain (1,109′) in Alabama:

This week’s industrial mineral is Kaolin (Kaolinite).

“Kaolinite /ˈkəlɪˌnt/[4][5] is a clay mineral, part of the group of industrial minerals, with the chemical composition Al2Si2O5(OH)4.  Rocks that are rich in kaolinite are known as kaolin /ˈkəlɪn/ or china clay.[7]

The main use of the mineral kaolinite (about 50% of the time) is the production of paper; its use ensures the gloss on some grades of coated paper.[47]
Kaolin is used (or was used in the past):

Kaolinite sample from Twiggs County, Georgia, USA. This sample is from the Cretaceous rocks of Georgia, where it occurs as lenses in paleodeltaic sands.

Electron Microscope Image of Kaolinite.
As I stated earlier, not very photogenic, but very important to our modern life.
Editors Note:  It is the intent of this site to keep this discussion as simple as possible, so as to educate the interested general public and not to discuss with the geology crowd the latest geologic theories and nuances.  Thanks, R
“No copyright infringement intended.
The rights belong to their respective owners”


We will now continue down the Industrial Mineral dusty trail and continue with

Enjoy the adventure!

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