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feldspar    音标拼音: [f'ɛldsp,ɑr]
n. 长石

长石

feldspar
n 1: any of a group of hard crystalline minerals that consist of
aluminum silicates of potassium or sodium or calcium or
barium [synonym: {feldspar}, {felspar}]

Feldspar \Feld"spar`\, Feldspath \Feld"spath`\, n. [G.
feldspath; feld field spath spar.] (Min.)
A name given to a group of minerals, closely related in
crystalline form, and all silicates of alumina with either
potash, soda, lime, or, in one case, baryta. They occur in
crystals and crystalline masses, vitreous in luster, and
breaking rather easily in two directions at right angles to
each other, or nearly so. The colors are usually white or
nearly white, flesh-red, bluish, or greenish.
[1913 Webster]

Note: The group includes the monoclinic (orthoclastic)
species orthoclase or common potash feldspar, and the
rare hyalophane or baryta feldspar; also the triclinic
species (called in general plagioclase) microcline,
like orthoclase a potash feldspar; anorthite or lime
feldspar; albite or soda feldspar; also intermediate
between the last two species, labradorite, andesine,
oligoclase, containing both lime and soda in varying
amounts. The feldspars are essential constituents of
nearly all crystalline rocks, as granite, gneiss, mica,
slate, most kinds of basalt and trachyte, etc. The
decomposition of feldspar has yielded a large part of
the clay of the soil, also the mineral kaolin, an
essential material in the making of fine pottery.
Common feldspar is itself largely used for the same
purpose. Feldspathic


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  • Feldspar - Wikipedia
    Feldspar ( ˈfɛl (d) ˌspɑːr FEL (D)-spar; sometimes spelled felspar) is a group of rock-forming aluminium tectosilicate minerals, also containing other cations such as sodium, calcium, potassium, or barium [3] The most common members of the feldspar group are the plagioclase (sodium-calcium) feldspars and the alkali (potassium-sodium) feldspars [4] Feldspars make up about 60% of the
  • The 12 Different Types Of Feldspar (With High-Quality Photos)
    Feldspar is one of the most common minerals found in the Earth’s crust, and it forms some really fascinating varieties Amazonite, orthoclase, and microcline are great examples of the types of feldspar, each with their own unique appeal and characteristics Feldspar isn’t just a pretty face in the world of minerals; it’s incredibly useful
  • Feldspar | Properties, Uses, Types, Facts | Britannica
    Feldspar, any of a group of aluminosilicate minerals that contain calcium, sodium, or potassium Feldspars make up more than half of Earth’s crust, and professional literature about them constitutes a large percentage of the literature of mineralogy Learn more about the properties and uses of feldspar in this article
  • Feldspar minerals make up over 50% of Earths crust.
    What is Feldspar? Feldspar is the name of a large group of rock-forming silicate minerals that make up over 50% of Earth's crust [1] They are found in igneous, metamorphic, and sedimentary rocks in all parts of the world Feldspar minerals have very similar structures, chemical compositions, and physical properties
  • Types of Feldspar: List of Varieties, Properties Prices
    Feldspar is a giant mineral group, but the main types of feldspar fall under plagioclase and alkali groups Discover every type of feldspar gemstone, including their prices, properties, and uses
  • Feldspar Group Minerals | Types, Properties, Occurrence, Uses
    Feldspar is the name of a large organization of rock-forming silicate minerals that make up over 50% of Earth’s crust They are discovered in igneous, metamorphic, and sedimentary rocks in all components of the sector
  • Potassium feldspar - Wikipedia
    Potassium feldspar refers to a number of minerals in the feldspar group that contain large amounts of potassium in the crystal lattice Orthoclase (endmember formula K Al Si 3 O 8), an important tectosilicate mineral that forms igneous rock
  • Feldspar minerals: properties, types, uses - ZME Science
    What is Feldspar? Feldspar refers to a group of aluminum tectosilicate minerals It contains a mixture of sodium, potassium, calcium, and barium, arranged in a variety of crystal types
  • Feldspar - Mineral Composition, Uses, Types | Britannica
    Feldspar - Mineral Composition, Uses, Types: All the rock-forming feldspars are aluminosilicate minerals with the general formula AT4O8 in which A = potassium, sodium, or calcium (Ca); and T = silicon (Si) and aluminum (Al), with a Si:Al ratio ranging from 3:1 to 1:1 Microcline and orthoclase are potassium feldspars (KAlSi3O8), usually designated Or in discussions involving their end-member
  • What Are Feldspars? Properties, Types, And Amazing Facts
    Walk across any continental landscape, pick up nearly any rock, and, chances are, in your hand you’re holding feldspars From the granite countertops in modern kitchens, to the ancient gneisses forming continental shields, from the volcanic ash enriching agricultural soils, to the porcelain in fine china, these unassuming minerals – often appearing as white, pink,…





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