Mineralogy Database

Delhayelite Mineral Data

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General Delhayelite Information

Help on Chemical  Formula: Chemical Formula: (Na,K)10Ca5Al6Si32O80(Cl2,F2,SO4)3•18(H2O)
Help on Composition: Composition: Molecular Weight = 3,231.17 gm
   Potassium   3.03 %  K     3.64 % K2O
   Sodium      5.34 %  Na    7.19 % Na2O
   Calcium     6.20 %  Ca    8.68 % CaO
   Aluminum    5.01 %  Al    9.47 % Al2O3
   Silicon    27.81 %  Si   59.50 % SiO2
   Hydrogen    1.12 %  H    10.04 % H2O
   Sulfur      0.60 %  S     1.49 % SO3
   Chlorine    0.77 %  Cl    0.77 % Cl
                -   %   Cl   -0.17 % -O=Cl2   
   Oxygen     49.71 %  O
   Fluorine    0.41 %  F     0.41 % F
                -   %   F    -0.17 % -O=F2    
             ______        ______ 
             100.00 %      100.84 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na7.5K2.5Ca5Al6Si32O80Cl0.7F0.7(SO4)0.6�18(H2O)
Help on Environment: Environment: In a kalsilite-bearing melitlite-nepheline lava.
Help on IMA Status: IMA Status: Approved IMA 1959
Help on Locality: Locality: On Mt. Sharheru, the extinct southern cone of Mt. Nyiragongo, Kivu Province, Zaire. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Fernard Delhaye (1880-1946), Belgian geologist, a pioneer in the geological exploration of the northern Kivu region of Zaire.
Help on Name Pronunciation: Name Pronunciation: Delhayelite + Pronunciation Say DELHAYELITE
Help on Synonym: Synonym: ICSD 24616
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