Plagioclase is a major constituent mineral in Earth's crust and is consequently an important diagnostic tool in petrology for identifying the composition, origin and evolution of igneous …

What is Plagioclase? Plagioclase is the name of a group of feldspar minerals that form a solid solution series ranging from pure albite, Na(AlSi 3 O 8), to pure anorthite, Ca(Al 2 Si 2 O 8). …

Plagioclase, any member of the series of abundant feldspar minerals usually occurring as light-colored, glassy, transparent to translucent, brittle crystals. Plagioclase is a mixture of albite, or …

Apr 23, 2023 · Plagioclase feldspar group minerals are the most common rock-forming minerals. They are importantly dominant minerals in most igneous rock. They are major constituents in a …

Aug 11, 2018 · Overview of physical properties, chemistry, structure, occurence and mineralogy of feldspar. Description of major members like anorthite, albite, plagioclase, orthoclase, …

Plagioclase minerals are typically white or gray, hard blocky crystal masses that exhibit cleavage in two directions that are nearly at right angles. They are particularly common in igneous and …

Plagioclases are fundamental constituents of the Earth’s crust and also of the anorthosite crust of the Moon (the highlands). The name plagioclase derives from the Greek πλάγιος (plágios, …

Plagioclase. Comments: Plagioclase, variety kenyite, crystals in volcanic rock. Location: Kirinyaga (Mount Kenya), Central Province, Kenya. Scale: See Photo. © Jeff Weissman / Photographic …

In petrology, the plagioclase series are defined based on their percentage of albite (Ab) to anorthite (An). Compositions of individual samples are usually ...

Detailed description, properties, locality information guide about the plagioclase feldspar mineral group: albite to andesine.