Mineralogy Database

Magnesiosadanagaite Mineral Data

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General Magnesiosadanagaite Information

Help on Chemical Formula: Chemical Formula: NaCa2[Mg3(Al,Fe+++)2]Si5AlO22(OH)2
Help on Composition: Composition: Molecular Weight = 869.29 gm
   Potassium   0.41 %  K     0.49 % K2O
   Sodium      2.48 %  Na    3.35 % Na2O
   Calcium     8.98 %  Ca   12.57 % CaO
   Magnesium   8.12 %  Mg   13.47 % MgO
   Titanium    1.62 %  Ti    2.71 % TiO2
   Manganese   0.14 %  Mn    0.18 % MnO
   Aluminum   11.12 %  Al   21.01 % Al2O3
   Chromium    0.01 %  Cr    0.01 % CrO
   Iron        5.28 %  Fe    6.20 % FeO /  0.55 % Fe2O3
   Silicon    17.43 %  Si   37.29 % SiO2
   Hydrogen    0.23 %  H     2.07 % H2O
   Oxygen     44.17 %  O
             ______        ______ 
             100.00 %       99.89 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na0.9(OH)2K0.09Ca1.94Na0.03Mg0.02Mg2.88Fe2+0.75Fe3+0.06Mn2+0.02Cr0.001Ti0.29Al0.97 Si5.39Al2.6O22
Help on Environment: Environment: The mineral occurs in a compositionally zoned crystal with a pargasite core in a contact aureole consisting predominantly of calcareous rocks adjacent to granite. Amphibole group.
Help on IMA Status: IMA Status: Approved IMA 2004 (Dana # Added)
Help on Locality: Locality: Kasuga-mura, Gifu Prefecture, central Japan. Occurrences in the eastern Alps and in Yunnan Province, China, are also known. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as a low-K analog of potassic-magnesiosadanagaite (renamed from original magnesiosadanagaite-IMA1982-102).
Help on Synonym: Synonym: IMA2002-051