Feldspars are a group of rock-forming tectosilicate minerals which make up as much as 60% of the Earth's crust. Feldspars crystallize from magma in both intrusive and extrusive igneous rocks, as veins, and are also present in many types of metamorphic rock. Feldspars are also found in many types of sedimentary rock.
Chemical Analysis :
| SiO2 |
: |
66% |
| Al2O3 |
: |
18.60% |
| K2O |
: |
10.30% |
| Fe2O3 |
: |
0.30% |
| Na2O |
: |
1% |
| P |
: |
0.02% |
| S |
: |
Traces |
| GV at 1000oC |
: |
0.70% |
Sieve analysis :
| -100 mesh |
: |
90% passing |
| -200 mesh |
: |
60% passing |
|
