Mineralogy Database

Apophyllite-(KF) Mineral Data

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General Apophyllite-(KF) Information

Help on Chemical  Formula: Chemical Formula: (K,Na)Ca4Si8O20(F,OH)•8(H2O)
Help on Composition: Composition: Molecular Weight = 760.47 gm
   Potassium   4.37 %  K     5.26 % K2O
   Sodium      0.45 %  Na    0.61 % Na2O
   Calcium    21.08 %  Ca   29.50 % CaO
   Silicon    29.55 %  Si   63.21 % SiO2
   Hydrogen    0.01 %  H     0.12 % H2O
   Oxygen     42.29 %  O
   Fluorine    2.25 %  F     2.25 % F
                -   %   F    -0.95 % -O=F2    
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K0.85Na0.15Ca4Si8O20F0.9(OH)0.1
Help on Environment: Environment: A secondary mineral in amygdules or druses in basalts. A late-stage mineral in some mineral deposits.
Help on IMA Status: IMA Status: Approved IMA 1978
Help on Locality: Locality: Poona, Nasik, and Bombay districts, Maharashtra, India. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek apophylliso - "it flakes off." and the composition containing fluorine;
Help on Name Pronunciation: Name Pronunciation: Apophyllite-(KF) + Pronunciation Say APOPHYLLITE-(KF)
Help on Synonym: Synonym: Fluorapophyllite - Renamed to Apophyllite-(F) by Mineralogical Record, v39, (2008), p 131