• Plagioclase - Wikipedia

    en.wikipedia.org/wiki/Plagioclase Plagioclase is a series of tectosilicate (framework silicate) minerals within the feldspar group. Rather than referring to a particular mineral with a specific chemical composition, plagioclase is a continuous solid solution series, more properly known as the plagioclase feldspar series (from the Ancient Greek for "oblique fracture", in reference to its two cleavage angles).
  • Plagioclase - Geology

    geology.com/minerals/plagioclase.shtml The plagioclase feldspar minerals are albite, oligoclase, andesine, labradorite, bytownite and anorthite. They are common rock-forming minerals and occasionally gem materials cut into moonstone, sunstone, labradorite and spectrolite.
  • plagioclase | Definition, Uses, & Facts | Britannica.com

    www.britannica.com/science/plagioclase Plagioclase, any member of the series of abundant feldspar minerals usually occurring as light-coloured, glassy, transparent to translucent, brittle crystals. Plagioclase is a mixture of albite (Ab), or sodium aluminosilicate (NaAlSi 3 O 8), and anorthite (An), or calcium aluminosilicate (CaAl 2 Si 2 O 8); the two intermingle and form a continuous chemical range (called a solid-solution series ...
  • Plagioclase | Definition of Plagioclase at Dictionary.com

    www.dictionary.com/browse/plagioclase Plagioclase definition, any of the feldspar minerals varying in composition from acidic albite, NaAlSi3O8, to basic anorthite, CaAl2Si2O8, found in most igneous rocks: shows twinning striations on good cleavage surfaces.
  • Plagioclase | Definition of Plagioclase by Merriam-Webster

    www.merriam-webster.com/dictionary/plagioclase Plagioclase definition is - a triclinic feldspar; especially : one having calcium or sodium in its composition.
  • Plagioclase - definition of plagioclase by The Free Dictionary

    www.thefreedictionary.com/plagioclase Any of a series of common feldspar minerals, consisting of mixtures of sodium and calcium aluminum silicates. Plagioclase is typically white, yellow, or reddish-gray, but it can also be blue to black.
  • Plagioclase - University of Auckland

    flexiblelearning.auckland.ac.nz/rocks_minerals/minerals/plagioclase.html Plagioclase Plagioclase is a member of the feldspar group (like orthoclase) and is a framework silicate.Plagioclase consists of a solid solution between the albite and anorthite end-members, and together with quartz is the most common of the rock forming minerals.
  • University of Minnesota’s Mineral Pages: Plagioclase Feldspar

    www.esci.umn.edu/courses/1001/minerals/plagioclase_feldspar.shtml Plagioclase minerals are hard, non-metallic minerals that exhibit two cleavage directions that meet at nearly right angles. The name ‘plagioclase’ refers to this cleavage pattern, coming from the Greek words for ‘oblique’ (plagios) and ‘to break’ (klasis).
  • Plagioclase | EVE Wiki | FANDOM powered by Wikia

    eve.fandom.com/wiki/Plagioclase Plagioclase Ore. Plagioclase is not amongst the most valuable ore types around, but it has the largest amount of Pyerite of any ore and is thus always in constant demand. It also yields some Tritanium and Mexallon.
  • Plagioclase Mineral Data - webmineral.com

    www.webmineral.com/data/Plagioclase.shtml Plagioclase Labradorite. Comments: Dual view of a cleavage fragment of labradorite showing the multi-colored labradorescence (schiller effect) and the same area viewed without the color.