Felspar

Felspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8) adalah kelompok mineral tektosilikat pembentuk batuan yang membentuk 41% kerak Bumi.[1]

Felspar
Feldspar
Kristal Feldspar (18×21×8.5 cm) dari Lembah Jequitinhonha, Minas Gerais, Brasil Tenggara.
Umum
KategoriMineral
Rumus kimiaKAlSi3O8NaAlSi3O8CaAl2Si2O8
Identifikasi
Kekerasan skala Mohs6-6.5


Felspar (KAlSi3O8NaAlSi3O8CaAl2Si2O8) adalah kelompok mineral tektosilikat pembentuk batuan yang membentuk 41% kerak Bumi.[1]

Felspar mengkristal dari magma pada batuan beku intrusif dan ekstrusif dalam bentuk urat, dan juga terdapat dalam berbagai jenis batuan metamorf.[2] Batuan yang hampir seluruhnya terbentuk dari felspar plagioklas kalsium dikenal sebagai anortosit.[3] Felspar juga ditemukan di berbagai jenis batuan sedimen.[4]

Lihat pula

Catatan kaki

 Artikel ini berisi bahan berstatus domain umum dari United States Geological Survey dokumen "Feldspar and nepheline syenite".

  1. ^ Feldspar. What is Feldspar? Diarsipkan 2008-02-15 di Wayback Machine. Industrial Minerals Association. Retrieved on July 18, 2007.
  2. ^ "Metamorphic Rocks." Metamorphic Rocks Information Diarsipkan 2007-07-01 di Wayback Machine.. Retrieved on July 18, 2007
  3. ^ Blatt, Harvey and Robert J. Tracy, Petrology, Freeman, 2nd ed., 1996, pp. 206–210 ISBN 0-7167-2438-3
  4. ^ "Weathering and Sedimentary Rocks." Geology. Diarsipkan 2007-07-03 di Wayback Machine. Retrieved on July 18, 2007.

Bahan bacaan

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