Mineralogy Database

Jonesite Mineral Data

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General Jonesite Information

Help on Chemical  Formula: Chemical Formula: Ba2(K,Na)[Ti2(Si5Al)O18•n(H2O)
Help on Composition: Composition: Molecular Weight = 914.93 gm
   Potassium   3.21 %  K     3.86 % K2O
   Barium     30.02 %  Ba   33.52 % BaO
   Sodium      0.63 %  Na    0.85 % Na2O
   Titanium   10.47 %  Ti   17.46 % TiO2
   Aluminum    2.95 %  Al    5.57 % Al2O3
   Silicon    15.35 %  Si   32.84 % SiO2
   Hydrogen    0.66 %  H     5.91 % H2O
   Oxygen     36.72 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba2K0.75Na0.25Ti2Si5AlO18•3(H2O)
Help on Environment: Environment: In fractures and cavities of brecciated greenstone enclosed in blueschist associated with neptunite and joaquinite.
Help on IMA Status: IMA Status: Approved IMA 1977
Help on Locality: Locality: Dallas Gem Mine (Gem Mine; Benitoite Mine), New Idria District, San Benito Co., California, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Francis Tucker Jones (1905-1993), Research Chemical Microscopist of Berkeley, California, USA, who discovered the mineral
Help on Name Pronunciation: Name Pronunciation: Jonesite Say JONESITE