Mineralogy Database

Simpsonite Mineral Data

Search Webmineral :
  
Advertisment

General Simpsonite Information

Help on Chemical  Formula: Chemical Formula: Al4(Ta,Nb)3O13(OH)
Help on Composition: Composition: Molecular Weight = 813.65 gm
   Tantalum  53.37 %  Ta   65.17 % Ta2O5
   Niobium    5.71 %  Nb    8.17 % Nb2O5
   Aluminum  13.26 %  Al   25.06 % Al2O3
   Hydrogen   0.12 %  H     1.11 % H2O
   Oxygen    27.53 %  O
            ______        ______ 
            100.00 %       99.51 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Al4Ta2.4Nb0.5O13(OH)
Help on Environment: Environment: Accessory mineral in some tantalum-rich granite pegmatites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1938
Help on Locality: Locality: Tabba Tabba, Western Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Edward Sydney Simpson (1875-1939), Western Australian government mineralogis and mineral analyst.
Help on Name Pronunciation: Name Pronunciation: Simpsonite + Pronunciation Say SIMPSONITE
Help on Synonym: Synonym: ICSD 67673
  PDF 15-705