Mineralogy Database

Macaulayite Mineral Data

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General Macaulayite Information

Help on Chemical  Formula: Chemical Formula: (Fe+++,Al)24Si4O43(OH)2
Help on Composition: Composition: Molecular Weight = 2,116.93 gm
   Aluminum   2.55 %  Al    4.82 % Al2O3
   Iron      58.04 %  Fe   82.98 % Fe2O3
   Silicon    5.31 %  Si   11.35 % SiO2
   Hydrogen   0.10 %  H     0.85 % H2O
   Oxygen    34.01 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe3+22Al2Si4O43(OH)2
Help on Environment: Environment: Deeply weathered granite.
Help on IMA Status: IMA Status: Approved IMA 1984
Help on Locality: Locality: Bennachie car park, 7 km NW of Inverurie, Aberdeenshire, Scotland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the Macaulay Institute for Soil Research.
Help on Name Pronunciation: Name Pronunciation: Macaulayite + Pronunciation Say MACAULAYITE