Mineralogy Database

Rowlandite-(Y) Mineral Data

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General Rowlandite-(Y) Information

Help on Chemical  Formula: Chemical Formula: Y4Fe++Si4O14F2 (?)
Help on Composition: Composition: Molecular Weight = 785.80 gm
   Yttrium   45.26 %  Y    57.47 % Y2O3
   Iron       7.11 %  Fe    9.14 % FeO
   Silicon   14.30 %  Si   30.59 % SiO2
   Oxygen    28.50 %  O
   Fluorine   4.84 %  F     4.84 % F
               -   %   F    -2.04 % -O=F2    
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Y4Fe2+Si4O14F2
Help on Environment: Environment: In some rare-earth-rich pegmatites. Associated with gadolinite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1891
Help on Locality: Locality: Baringer Hill pegmatite, 26 km west of Burnet, Llano Co., and from Clear Creek, Burnet Co., Texas, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Henry Augustus Rowland (1848-1901), American physicist and spectroscopist, of Johns Hopkins University, Baltimore, Maryland, USA,
Help on Name Pronunciation: Name Pronunciation: Rowlandite-(Y) + Pronunciation Say ROWLANDITE-(Y)