Mineralogy Database

Orlandiite Mineral Data

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General Orlandiite Information

Help on Chemical  Formula: Chemical Formula: Pb3(Cl,OH)4(SeO3)•(H2O)
Help on Composition: Composition: Molecular Weight = 899.16 gm
   Hydrogen   0.28 %  H     2.50 % H2O
   Lead      69.13 %  Pb   74.47 % PbO
   Selenium   8.78 %  Se   12.34 % SeO2
   Chlorine  13.80 %  Cl   13.80 % Cl
               -   %   Cl   -3.11 % -O=Cl2   
   Oxygen     8.01 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb3Cl3.5(OH)0.5(SeO3)•(H2O)
Help on Environment: Environment: Secondary mineral in the oxidation zone of an old lead and arsenic mine.
Help on IMA Status: IMA Status: Approved IMA 1998 (Dana # Added)
Help on Locality: Locality: Baccu Locci mine, Sardinia, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for mineralogist Paolo Orlandi (1946-) of the University of Pisa, Italy.
Help on Synonym: Synonym: IMA1998-038