Mineralogy Database

Hiortdahlite Mineral Data

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General Hiortdahlite Information

Help on Chemical  Formula: Chemical Formula: (Ca,Na,Y)3(Zr,Ti)Si2O7(F,O,OH)2
Help on Composition: Composition: Molecular Weight = 371.93 gm
   Sodium      5.56 %  Na    7.50 % Na2O
   Calcium    21.55 %  Ca   30.16 % CaO
   Yttrium     2.39 %  Y     3.04 % Y2O3
   Zirconium  14.72 %  Zr   19.88 % ZrO2
   Titanium    1.29 %  Ti    2.15 % TiO2
   Silicon    15.10 %  Si   32.31 % SiO2
   Hydrogen    0.05 %  H     0.48 % H2O
   Oxygen     32.69 %  O
   Fluorine    6.64 %  F     6.64 % F
                -   %   F    -2.80 % -O=F2    
             ______        ______ 
             100.00 %       99.35 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2Na0.9Y0.1Zr0.6Ti0.1(Si2O7)F1.3O0.4(OH)0.2
Help on Environment: Environment: Rare mineral in alkalic rocks, their pegmatites and metamorphosed equivalents and miarolitic cavities in sanidinites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1889
Help on Locality: Locality: Mittel Aro, Lille Aro, and Stokko Islands, Norway. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for prof. Thorstein Hallager Hiortdahl (1839-1925), Mineralogist of Christiania (now Olso), Norway.
Help on Name Pronunciation: Name Pronunciation: Hiortdahlite + Pronunciation Say HIORTDAHLITE