Back Diagrama QAPF Catalan Diagram QAPF Czech Streckeisendiagramm German Diagrama QAPF Spanish QAPF-diagramm Estonian QAPF diagrama Basque דיאגרמת QAPF HE Diagram QAPF ID Diagramma QAPF Italian QAPF図 Japanese
A QAPF diagram is a doubled-triangle plot diagram used to classify intrusive igneous rocks based on their mineralogy. The acronym QAPF stands for "Quartz, Alkali feldspar, Plagioclase, Feldspathoid (Foid)", which are the four mineral groups used for classification in a QAPF diagram. The percentages (ratios) of the Q, A, P and F groups are normalized, i.e., recalculated so that their sum is 100%.
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