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November 12, 2017 Weekly Geology Guest, Feldspar

November 12, 2017
Greetings from the Bluff Park Back Porch, way up yonder on Shades Mountain (1,109′) in Alabama:
 
 
For the next several weeks we will delve into Industrial Minerals, While they are not glamorous, they are terribly important to our modern way of life. 
 
 


Typical examples of industrial rocks and minerals are limestone, clays, sand, gravel, diatomite, kaolin, bentonite, silica, barite, gypsum, and talc. Some examples of applications for industrial minerals are construction, ceramics, paints, electronics, filtration, plastics, glass, detergents and paper.

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Feldspar

https://en.wikipedia.org/wiki/Feldspar

Feldspars (KAlSi3O8NaAlSi3O8CaAl2Si2O8) are a group of rock-forming tectosilicate minerals that make up about 41% of the Earth‘s continental crust by weight.[2]
Feldspar Uses
“Feldspar is a common raw material used in glassmaking, ceramics, and to some extent as a filler and extender in paint, plastics, and rubber. In glassmaking, alumina from feldspar improves product hardness, durability, and resistance to chemical corrosion. In ceramics, the alkalis in feldspar (calcium oxide, potassium oxide, and sodium oxide) act as a flux, lowering the melting temperature of a mixture. Fluxes melt at an early stage in the firing process, forming a glassy matrix that bonds the other components of the system together. In the US, about 66% of feldspar is consumed in glassmaking, including glass containers and glass fiber. Ceramics (including electrical insulators, sanitaryware, pottery, tableware, and tile) and other uses, such as fillers, accounted for the remainder.[16]

https://mineralseducationcoalition.org/minerals-database/feldspar/

Feldspar Locality: Virgem da Lapa, Jequitinhonha valley, Minas Gerais, Southeast Region, Brazil (Locality at mindat.org) Size: 18 x 21 x 8.5 cm. A superb, textbook feldspar crystal. Not just is it big, but it is stark white, perched on a natural pedestal, and just an amazing display of perfection in symmetry in nature. Ex. Franz Saller Collection of Bavaria, Germany; probably purchased in the 1980s. The piece is pristine and complete-all-around – remarkably free of damage.

Feldspar-Group-291254.jpg

2010.  Rob Lavinsky @ IRocks.com

Feldspar Mining in Norway.

Note:  The white rock is feldspar.

Crushed Felspar.

http://www.crusherinc.com/News/sodium-feldspar-crusher.html

>    Your saved, there are not too many pictures.  R


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List of Industrial Minerals
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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
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“No copyright infringement intended.
The rights belong to their respective owners”
 
Copyright Disclaimer: Under Section 107 of the Copyright Act 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use.
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Author’s Request:  If you see any pictures that you know the source and photographer, let me know immediately.  Thanks!  R

Images have been searched by TinEye Reverse Image Search.  http://tineye.com/
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We will now continue down the Industrial Mineral dusty trail and continue with Fluorspar (Also called Fluorite = calcium fluoride).
 
 
Enjoy the adventure!
 
Thanks,
 

R
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