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Tombarthite-(Y) Mineral Data
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General Tombarthite-(Y) Information
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 Chemical Formula: |
Y4(Si,H4)4O12-x(OH)4+2x |
| Composition: |
Molecular Weight = 744.26 gm |
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Calcium 4.31 % Ca 6.03 % CaO |
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La,Ce,Pr,Nd,Sm, 19.35 % RE 22.57 % REE2O3 |
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Yttrium 26.28 % Y 33.37 % Y2O3 |
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Silicon 7.55 % Si 16.15 % SiO2 |
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Hydrogen 2.53 % H 22.63 % H2O |
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Oxygen 39.98 % O |
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______ ______ |
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100.00 % 100.75 % = TOTAL OXIDE |
| Empirical Formula: |
Y2.2REECa0.8Si2H8.2O8.1(OH)10.5 |
| Environment: |
In pegmatite dikes cutting amphibolites. |
| IMA Status: |
Approved IMA 1968 |
| Locality: |
Hogetveit quarry, near Setesdal, Evje, and at Reiarsdal, Norway. Link to MinDat.org Location Data. |
| Name Origin: |
Named after Thomas Fredrik Barth (1899-1971), mineralogist and petroligist, Oslo University, Oslo, Norway. |
| Name Pronunciation: |
Tombarthite-(Y) + Pronunciation  |
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