Mineralogy Database

Aspidolite Mineral Data

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General Aspidolite Information

Help on Chemical Formula: Chemical Formula: NaMg3AlSi3O10(OH)2
Help on Composition: Composition: Molecular Weight = 410.89 gm
   Potassium   0.95 %  K     1.15 % K2O
   Sodium      5.04 %  Na    6.79 % Na2O
   Magnesium  13.43 %  Mg   22.27 % MgO
   Titanium    0.58 %  Ti    0.97 % TiO2
   Aluminum   12.15 %  Al   22.95 % Al2O3
   Iron        3.13 %  Fe    4.02 % FeO
   Silicon    17.50 %  Si   37.43 % SiO2
   Hydrogen    0.48 %  H     4.32 % H2O
   Oxygen     46.61 %  O
   Fluorine    0.14 %  F     0.14 % F
                -   %   F    -0.06 % -O=F2    
             ______        ______ 
             100.00 %       99.98 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na0.9K0.1Mg2.27Al0.41Fe2+0.23Ti0.05Al1.44Si2.56O10(OH)1.97F0.03
Help on Environment: Environment: Found in Zone 4 (forsterite-diopside) of the contact aureole around the Kaizuki-yama granite. Renamed in 1998 from sodiumphlogopite by the IMA Mica commission. 1M polytype.
Help on IMA Status: IMA Status: Approved IMA 1980
Help on Locality: Locality: Found in waste rock in the Kawai pit of the Kasuga mine. Kasuga-mura, Gifu Prefecture, central Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: The name is from the Greek "aspisidos", like a shield, alluding to the appearance of its crystals.
Help on Name Pronunciation: Name Pronunciation: Aspidolite + Pronunciation Say ASPIDOLITE
Help on Synonym: Synonym: IMA2004-049
  Natriumphlogopite - Renamed to Aspidolite - NOMENCLATURE OF THE MICAS, Thz Canadian Mineralogist, Vol. 36, pp. 90s-912 (1998)
  Phlogopite-Na - Renamed to Aspidolite - NOMENCLATURE OF THE MICAS, Thz Canadian Mineralogist, Vol. 36, pp. 90s-912 (1998)
  Sodium phlogopite - Renamed to Aspidolite - NOMENCLATURE OF THE MICAS, Thz Canadian Mineralogist, Vol. 36, pp. 90s-912 (1998)
  Sodiumphlogopite