Mineralogy Database

Liddicoatite Mineral Data

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General Liddicoatite Information

Help on Chemical  Formula: Chemical Formula: Ca(Li,Al)3Al6(BO3)3Si6O18(O,OH,F)4
Help on Composition: Composition: Molecular Weight = 917.49 gm
   Sodium     0.75 %  Na    1.01 % Na2O
   Lithium    1.21 %  Li    2.61 % Li2O
   Calcium    3.06 %  Ca    4.28 % CaO
   Aluminum  18.23 %  Al   34.45 % Al2O3
   Silicon   18.37 %  Si   39.29 % SiO2
   Boron      3.53 %  B    11.38 % B2O3
   Hydrogen   0.32 %  H     2.85 % H2O
   Oxygen    52.66 %  O
   Fluorine   1.86 %  F     1.86 % F
               -   %   F    -0.78 % -O=F2    
            ______        ______ 
            100.00 %       96.95 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca0.7Na0.3Li1.6Al6.2(BO3)3Si6O18.3(OH)2.9F0.9
Help on Environment: Environment: Detrital in soil, an apparent alluvial product of the local pegmatites.
Help on IMA Status: IMA Status: Approved IMA 1977 (Dana # Changed)
Help on Locality: Locality: From Antsirabe, Tsilaizina, and Anjanabonoina, Madagascar. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Richard T. Liddicot (1918-2003), gemologist, who invented the diamond grading system, for his many contributions to the Gemological Institute of America.
Help on Name Pronunciation: Name Pronunciation: Liddicoatite + Pronunciation Say LIDDICOATITE
Help on Synonym: Synonym: Liddicoatite - (61.3.1.2)
  Tourmaline