Qapf Diagram

Qapf Diagram. The acronym QAPF stands for " Quartz, Alkali feldspar, Plagioclase, Feldspathoid (Foid)". TAS Diagram Plotter Excel spreadsheet that allows for fast plotting onto a TAS (total alkali silica) diagram for use in naming your volcanic rock by composition.

Igneous rocks
Igneous rocks (Jeffery Walsh)
The acronym QAPF stands for " Quartz, Alkali feldspar, Plagioclase, Feldspathoid (Foid)". Furthermore, these diagrams are merely descriptive and not genetic. The acronym QAPF stands for "Quartz, Alkali feldspar, Plagioclase, Feldspathoid (Foid)".

In plutonic rocks, all of the minerals are crystallized into visible grains.

QAPF diagram represents only the normalized felsic (light colored minerals) part of the rock, so for this illustration I avoided adding mafic (dark colored) minerals.

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Igneous rocks

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Datei:QAPF diagram plutonic deutsch.svg - Chemie-Schule

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The acronym QAPF stands for "Quartz, Alkali feldspar, Plagioclase, Feldspathoid (Foid)". They are not designed with the chemical composition of the rocks in the mind. QAPF diagram and Acronym · See more » Albert Streckeisen.

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