• Anorthite - Wikipedia

    en.wikipedia.org/wiki/Anorthite Anorthite is the calcium-rich endmember of the plagioclase solid solution series, the other endmember being albite, NaAlSi 3 O 8.Anorthite also refers to plagioclase compositions with more than 90 molecular percent of the anorthite endmember. At 1 atmosphere, anorthite melts at 1553 °C.. Occurrence. Anorthite is a rare compositional variety of plagioclase.
  • Anorthite: Mineral information, data and localities.

    www.mindat.org/min-246.html Feldspar Group. Ca-rich end member of the Albite-Anorthite Series. High- and low-temperature structural modifications exist. Visit gemdat.org for gemological information about Anorthite.
  • Anorthite | Definition of Anorthite by Merriam-Webster

    www.merriam-webster.com/dictionary/anorthite Anorthite definition is - a white, grayish, or reddish feldspar occurring in many igneous rocks.
  • Anorthite | mineral | Britannica.com

    www.britannica.com/science/anorthite Anorthite, a feldspar mineral, calcium aluminosilicate (CaAl2Si2O8), that occurs as white or grayish, brittle, glassy crystals. Primarily a rock-forming mineral, it is used in the manufacture of glass and ceramics. Anorthite occurs in basic igneous rocks, as at Trentino, Italy; Södermanland,
  • Anorthite | Definition of Anorthite at Dictionary.com

    www.dictionary.com/browse/anorthite Anorthite definition, a white or gray feldspar mineral, CaAl2Si2O8, calcic plagioclase. See more.
  • Anorthite - definition of anorthite by The Free Dictionary

    www.thefreedictionary.com/anorthite an·or·thite (ăn-ôr′thīt) n. A white to gray variety of plagioclase feldspar that contains a high proportion of calcium to sodium and occurs in alkaline igneous rocks such as gabbro and anorthosite. [From Greek an-, not; see a-1 + orthos, straight (from its oblique crystals).] an′or·thit′ic (-thĭt′ĭk) adj. anorthite (ænˈɔːθaɪt) n ...
  • Anorthite: The feldspar mineral Anorthite information and ...

    www.minerals.net/mineral/anorthite.aspx Anorthite belongs to the Plagioclase Feldspar group, an isomorphous solid solution series. Albite is one end member, containing sodium and no calcium. The other end member, Anorthite, contains calcium and no sodium. The intermediary members are Oligoclase, Andesine, Labradorite, and Bytownite.Labradorite and Bytownite are considered by some to be a variety of Anorthite rather then a separate ...
  • THE MINERAL ANORTHITE - Amethyst Galleries

    www.galleries.com/Anorthite Anorthite is an end member and one of the rarer members of the plagioclase series. The plagioclase series comprises minerals that range in chemical composition from pure NaAlSi3 O8, Albite to pure CaAl2 Si2 O8 , anorthite.Anorthite by definition must contain no more than 10% sodium and no less than 90% calcium in the sodium/calcium position in the crystal structure.
  • Anorthite Mineral Data

    www.webmineral.com/data/Anorthite.shtml General Anorthite Information : Chemical Formula: CaAl2Si2O8 : Composition: Molecular Weight = 277.41 gm Sodium 0.41 % Na 0.56 % Na 2 O: Calcium 13.72 % Ca 19.20 % CaO: Aluminum 18.97 % Al 35.84 % Al 2 O 3: Silicon 20.75 % Si 44.40 % SiO 2: Oxygen 46.14 % O: 100.00 % 100.00 % = TOTAL OXIDE
  • Anorthosite - Wikipedia

    en.wikipedia.org/wiki/Anorthosite Anorthosite (/ æ n ˈ ɔːr θ ə s aɪ t /) is a phaneritic, intrusive igneous rock characterized by its composition: mostly plagioclase feldspar (90–100%), with a minimal mafic component (0–10%). Pyroxene, ilmenite, magnetite, and olivine are the mafic minerals most commonly present.. Anorthosites are of enormous geologic interest, because it is still not fully understood how they form.