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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 is a common raw material used in glassmaking, ceramics, and to some extent as a filler and extender in paints, plastics, and rubber In the US, about 66% of feldspar is consumed in glassmaking, including glass containers and glass fibre
  • 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 | 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
  • Feldspar minerals make up over 50% of Earths crust.
    Feldspar minerals occur in igneous, metamorphic and sedimentary rocks throughout the world They are used to make glass, ceramics, paint, plastics, rubber and many other products Moonstone, labradorite, sunstone and amazonite are examples of feldspar gem materials
  • Feldspar Distinctions, Characteristics Identification
    Feldspars are a group of closely related minerals that together are the most abundant mineral in the Earth's crust A thorough knowledge of the feldspars is what separates geologists from the rest of us Feldspars are hard minerals, all of them with a hardness of 6 on the Mohs scale
  • Feldspar Minerals | Types, Structure and Role in Earths Crust
    What is feldspar Feldspar is the most abundant mineral group in the Earth’s crust There are more feldspars (60%) than all the other minerals combined in the outer (13-17) km of the crust 1 Feldspars occur in most igneous and metamorphic rocks
  • 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 - Essential Minerals Association
    What is Feldspar? The name feldspar encompasses a wide range of related minerals Collectively, they are the most abundant group of minerals in the world, forming about 60 percent of the earth’s crust Feldspars are particularly abundant in igneous rocks like granite
  • 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
  • Feldspar - Minerals Education Coalition
    Feldspar is the name given to a group of minerals distinguished by the presence of alumina and silica (SiO 2) in their chemistry This group includes aluminum silicates of soda, potassium, or lime It is the single most abundant mineral group on Earth





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