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Phase composition (XRD)

Diffraction pattern:

Description:

Dominant cristalline phase is quartz and in a small amount anorthoclase. You can not exclude the presence muskovite.
 

Chemical composition (XRF)

ElementContent [%]
Na2O 0,86
MgO 0,28
Al2O3 2,1
SiO2 93,6
P2O5 0,06
SO3 0,03
K2O 2,08
CaO 0,22
TiO2 0,23
Fe2O3 0,54