feldspathoid

enUK

feld·spath·oid

F5070700 (fĕld-spăth′oid′, fĕl-)n. Any of a group of relatively rare minerals that are chemically very similar to feldspars, but have too little silica to qualify as feldspars.

[feldspath (obsolete variant of feldspar, from obsolete German Feldspath, feldspar; see feldspar) + -oid.]

feldspathoid

(ˈfɛldspəˌθɔɪd) or

felspathoid

n (Geological Science) any of a group of rock-forming minerals, such as leucite and sodalite, that are similar to feldspars but contain less silica

feld•spath•oid

(ˈfɛld spæˌθɔɪd, ˈfɛl-)

adj. 1. Also, feld`spath•oi′dal. of or pertaining to a group of minerals similar in chemical composition to certain feldspars except for a lower silica content. n. 2. a mineral of this group, as nepheline or leucite. [1895–1900; < German Feldspat(h) (see feldspar) + -oid]

Feldspathoid

feldspathoid

[′fel‚spa‚thȯid] (geology) Aluminosilicates of sodium, potassium, or calcium that are similar in composition to feldspars but contain less silica than the corresponding feldspar.

Feldspathoid

a group of alkali rock-forming minerals (aluminosilicates) that are not as rich in silica as the feldspars. The structure of the feldspathoids characteristically includes additional anions, such as Cl^–, CO₃^2–, SO₄^2–, S^2–, and sometimes H₂O. The feldspathoids replace the feldspars in alkalic rocks and some basic rocks. The major feldspathoid minerals include nepheline, leucite, sodalite, nosean, haiiyne, and cancrinite.

单词	feldspathoid
释义	feldspathoid enUK feld·spath·oid F5070700 (fĕld-spăth′oid′, fĕl-)n. Any of a group of relatively rare minerals that are chemically very similar to feldspars, but have too little silica to qualify as feldspars. [feldspath (obsolete variant of feldspar, from obsolete German Feldspath, feldspar; see feldspar) + -oid.] feldspathoid (ˈfɛldspəˌθɔɪd) or felspathoid n (Geological Science) any of a group of rock-forming minerals, such as leucite and sodalite, that are similar to feldspars but contain less silica feld•spath•oid (ˈfɛld spæˌθɔɪd, ˈfɛl-) adj. 1. Also, feld`spath•oi′dal. of or pertaining to a group of minerals similar in chemical composition to certain feldspars except for a lower silica content. n. 2. a mineral of this group, as nepheline or leucite. [1895–1900; < German Feldspat(h) (see feldspar) + -oid] Feldspathoid enUK feldspathoid [′fel‚spa‚thȯid] (geology) Aluminosilicates of sodium, potassium, or calcium that are similar in composition to feldspars but contain less silica than the corresponding feldspar. Feldspathoid a group of alkali rock-forming minerals (aluminosilicates) that are not as rich in silica as the feldspars. The structure of the feldspathoids characteristically includes additional anions, such as Cl^–, CO₃^2–, SO₄^2–, S^2–, and sometimes H₂O. The feldspathoids replace the feldspars in alkalic rocks and some basic rocks. The major feldspathoid minerals include nepheline, leucite, sodalite, nosean, haiiyne, and cancrinite.
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