FELDSPAR
CLAYS
AGENCIES
OTHER MINERALS

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 A-325 North Cup Nephelin
Phase diagram
The thermochemical behaviour for North Cape Nepheline Syenite is shown on the phase diagram where North Cape Nepheline Syenite, according to its chemical composition, is plotted at point(+). This point lies on the line between the mineral feldspar and the mineral nepheline. it can be seen that nepheline and silica are not coexistent at high temperatures. They react readily,thus forming feldspar. this is one of the main reasons for the high dissolution rate of quartz in the glass matrix of a ceramic body containing North Cape Nepheline Syenite.


 Chemical Analysis
SiO2 57.0%
Al2 O3 23.8%
Fe2 O3 0.12%
Na2 O 7.8%
K2O 9.1%
CaO 1.1%
BaO 0.3%
SrO 0.3%
F 40ppn
Cl(water soluble) 18ppn
Cl(total) 75ppn
L.O.I 1.1%
 partical size Analysis
UM BSI TYLER ASTM DIM
100       -60
90 -170 -170 -170 -70
80        
70 -200 -200 -200 -80
60 -240 -250 -230 -100
50 -300 -270 -270  
40    -325 -325  
30   -400 -400  
20        
10        
0        

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 PACKING
50 KG/PAPER BAG
30 bags/ballet

 
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