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Kentbrooksite Mineral Data
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General Kentbrooksite Information
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 Chemical Formula: |
(Na,REE)15(Ca,REE)6Mn++Zr3NbSi25O74F2•2(H2O) |
| Composition: |
Molecular Weight = 3,900.86 gm |
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Sodium 5.30 % Na 7.15 % Na2O |
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Calcium 4.11 % Ca 5.75 % CaO |
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La,Ce,Pr,Nd,Sm, 29.53 % RE 34.45 % REE2O3 |
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Zirconium 7.02 % Zr 9.48 % ZrO2 |
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Manganese 1.41 % Mn 1.82 % MnO |
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Niobium 2.38 % Nb 3.41 % Nb2O5 |
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Silicon 18.00 % Si 38.51 % SiO2 |
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Hydrogen 0.10 % H 0.92 % H2O |
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Oxygen 31.17 % O |
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Fluorine 0.97 % F 0.97 % F |
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- %
F -0.41 % -O=F2 |
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______ ______ |
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100.00 % 102.05 % = TOTAL OXIDE |
| Empirical Formula: |
Na9REE6Ca4REE2Mn2+Zr3NbSi25O74F2•2(H2O) |
| Environment: |
A manganese and fluorine rich member of the eudialyte group in alkaline pegmatite bodies cutting pulaskite rocks. |
| IMA Status: |
Approved IMA 1998 (Dana # Added) |
| Locality: |
Amdrup Fjord, Kangerdlugssuaq intrustion, East Greenland. Link to MinDat.org Location Data. |
| Name Origin: |
For Dr. C. Kent Brooks (1943-), leader of fourteen geological expeditions to the Kangerdlugssuaq area of east Greenland. |
| Name Pronunciation: |
Kentbrooksite + Pronunciation  |
| Synonym: |
IMA1996-023 |
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