• 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 | Definition, Uses, & Facts | Britannica

    www.britannica.com/science/plagioclase 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 sodium aluminosilicate, and anorthite, or calcium aluminosilicate.
  • Plagioclase Feldspar: A group of common rock-forming minerals

    geology.com/minerals/plagioclase.shtml 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).Minerals in this series are a homogenous mixture of albite and anorthite. The names of the minerals in the series are arbitrarily given based upon their relative abundance of albite and anorthite.
  • Plagioclase: The mineral Plagioclase information and pictures

    www.minerals.net/mineral/plagioclase.aspx The Plagioclase series is a group of related feldspar minerals that essentially have the same formula but vary in their percentage of sodium and calcium. Albite and Anorthite are the end members of the series, with the intermediary minerals Oligoclase, Andesine, Labradorite, and Bytownite. The acclaimed Dana's System of Mineralogy lists the intermediary members as individual minerals, whereas ...
  • 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).Apart from pegmatites, the plagioclase minerals seldom occur as well-defined isolated crystals, but instead occur as blocky to ...
  • Plagioclase

    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. The twinning in plagioclase produces stacks of twin layers that are typically fractions to several millimetres thick.
  • Plagioclase – Wikipédia, a enciclopédia livre

    pt.wikipedia.org/wiki/Plagioclase Plagioclase ou plagioclásio é uma importante série de tectossilicatos da família dos feldspatos.Esta designação não se refere a um mineral com uma composição química específica, mas a uma série de soluções sólidas, mais conhecida como a série da plagioclase (do grego para "fractura oblíqua" devido aos seus dois ângulos de clivagem).
  • Plagioclase | EVE Wiki | Fandom

    eve.fandom.com/wiki/Plagioclase 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. It has a volume of 0.35m3, and it requires 333 ore units to refine. There are two variants: Contents[show] Azure Plagioclase Azure Plagioclase was made infamous in the melancholic song prose Miner ...
  • Wisconsin Geological & Natural History Survey » Plagioclase

    wgnhs.wisc.edu/minerals/plagioclase — Plagioclase is an abundant component of the Dunbar Gneiss, forming megacrysts up to 2 cm. long associated with K feldspar, biotite and quartz. It is well-exposed as augen gneiss in the SE NW sec. 36 T.38N. R.18E. (Sims et al., 1992). — Plagioclase is abundant in the Marinette Quartz Diorite with quartz and biotite.
  • 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. See more.