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Terrastone pottery clay analysis


More info on Terrastone. Apparently it's not as rich in 
iron as we thought. Only 4%! anybody who can get on their 
web page, please send us whatever you can find out.
     
How come everything is an oxide? Why isn't it classified 
according to the types of aluminum silicates etc.? What is 
LOI?
     
20 Kg Terrastone iron rich pottery clay
     
Cost:     ~$18 Cdn for 20 Kg
Address:  Plainsman Clays Ltd       Phone: (403)527-8535
          Box 126                    FAX: (403)527-75086 
          Medicine Hat, Alberta
          T1A 7M9   CANADA
     
WWW: http://www.memlane.com/business/imc
     
Chemical Analysis:
 BaO     0.4%
 CaO     0.5
 K2O     3.2
 MgO     2.5
 Na2O    0.7
 TiO2    0.7
 Al2O3  16.1
 P2O5    0.3
 SiO2   71.5
 Fe2O3   4.0
 LOI     6.5
     
Maybe there's something important about pottery clays that they have to 
contain a lot of silica in order to bond when fired. Even though this is 
considered iron rich for pottery clay, by the standards for laterite, it 
must be very low in iron. Maybe the quest for a low cost alternative to 
laterite needs to continue or we need to find a way to enrich the iron 
content of this clay.

Steve

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