Mineralogy Database

Nepheline Mineral Data

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General Nepheline Information

Help on Chemical  Formula: Chemical Formula: (Na,K)AlSiO4
Help on Composition: Composition: Molecular Weight = 146.08 gm
   Potassium   6.69 %  K     8.06 % K2O
   Sodium     11.80 %  Na   15.91 % Na2O
   Aluminum   18.47 %  Al   34.90 % Al2O3
   Silicon    19.23 %  Si   41.13 % SiO2
   Oxygen     43.81 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na0.75K0.25Al(SiO4)
Help on Environment: Environment: Silica-poor igneous rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1800
Help on Locality: Locality: Magnet Cove, Magnet Cove, Ouachita Mountains, Hot Spring County, Arkansas, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek nephele, "cloud," because it becomes clouded when put in strong acid.
Help on Name Pronunciation: Name Pronunciation: Nepheline + Pronunciation Say NEPHELINE
Help on Synonym: Synonym: Elaeolite
  ICSD 2937
  Nephelite
  PDF 9-338