Mineralogy Database

Numanoite Mineral Data

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General Numanoite Information

Help on Chemical  Formula: Chemical Formula: Ca4CuB4O6(OH)6(CO3)2
Help on Composition: Composition: Molecular Weight = 573.17 gm
   Calcium    27.26 %  Ca   38.14 % CaO
   Magnesium   0.61 %  Mg    1.02 % MgO
   Zinc        0.41 %  Zn    0.51 % ZnO
   Copper      8.58 %  Cu    9.66 % Cu2O
   Boron       7.49 %  B    24.10 % B2O3
   Hydrogen    1.09 %  H     9.76 % H2O
   Carbon      4.31 %  C    15.81 % CO2
   Oxygen     50.25 %  O
             ______        ______ 
             100.00 %       99.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca3.89Cu0.77Mg0.14Zn0.03B3.96O5.61(OH)6.2(CO3)2.05
Help on Environment: Environment: Occurs as 1 to 5 mm cores in crystals or veins of boracite in a skarn with cavities and veins in crystalline limestone. Cu-dominant analogue of borcarite.
Help on IMA Status: IMA Status: Approved IMA 2005 (Dana # Added)
Help on Locality: Locality: Fuka mine, Fuka, Bitchu-cho, Takahashi City, Okayama Prefecture, Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Tadayuki Numano (1931-2001), Emeritus Professor of Okayama University.
Help on Synonym: Synonym: IMA2005-050