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