FELDSPAR

Feldspar is the name given to a group of minerals distinguished by the presence of alumina and silica (SiO2) in their chemistry.  This group includes aluminum silicates of soda, potassium, or lime. It is the single most abundant mineral group on Earth.  They account for an estimated 60% of exposed rocks, as well as soils, clays, and other unconsolidated sediments, and are principal components in rock classification schemes. The minerals included in this group are the orthoclase, microcline and plagioclase feldspars.

Mineral Classification: silicates

Chemical Formula:    KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8

Specific Gravity:   2.55-2.76

MOHs Hardness:   6-6.5

SPECIFICATIONS OF POTASH FELDSPAR
 
Loss of ignition        LOI          0.337%     
Silica                          SIO2        65.89        
Calcium Oxide         Cao           1.232          
Magnesium Oxide  Mgo          0.36            
Alumina                    AI203      18.03      
Ferric Oxide             Fe203        0.13          
Sodium Oxide          Na20         3.22        
Potassium Oxide     K2O         10.08       

                                                          SPECIFICATION OF FELDSPAR
 
                                                 POTASH                 SODIUM           SODIUM                    
                                                  FELDSPAR         FELDSPAR             F'PAR
                                                                                                             ZED MES
 
 
Loss of ignition        LOI          0.337%                     029%                      1.48 %
 
Silica                         SIO2         65.89                        65.38                    66.80
 
Calcium Oxide        Cao            1.232                           2.04                      2.03
 
Magnesium Oxide   Mgo          0.36                           0.44                    -------
 
Alumina                    AI203         18.03                          17.60                    16.61
 
Ferric Oxide            Fe203            0.13                            0.11                     0.90
 
Sodium Oxide           Na20            3.22                          11.42                    10.22
 
Potassium Oxide      k20             10.08                           1.44                    0.87


                   SPECIFICATIONS OF POTASH FELDSPAR(LUMPS)
 

1. LOI……………..…..1.21%

 

1. SiO2……………….63.28%

 

1. CaO………………...1.24%

 

1. MgO……………….0.34%

 

1. Al2O3……….……16.88%

 

1. Fe2O3……………..0.18%

 

1. Na2O3……….…….2.0%

 

1. K2O……………….12.48%
   

   
SPECIFICATION OF SODIUM FELDSPAR
 
LOI....................... 1.48%
SiO2....................68.80%
CaO.....................   2.03%
MgO....................   traces
Al2O3...................16.61%
Fe2O3...................0.90%
Na2O.....................10.22%
K2O........................0.87%