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Hundholmenite-(Y) Mineral Data
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General Hundholmenite-(Y) Information
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 Chemical Formula: |
(Y,REE,Ca,Na)15(Al,Fe+++)CaxAs+++1-x(Si,As+++++)Si6B3(O,F)48 |
| Composition: |
Molecular Weight = 2,521.06 gm |
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Sodium 0.91 % Na 1.23 % Na2O |
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Calcium 5.56 % Ca 7.79 % CaO |
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La,Ce,Pr,Nd,Sm, 28.56 % RE 33.32 % REE2O3 |
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Yttrium 21.16 % Y 26.87 % Y2O3 |
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Aluminum 0.80 % Al 1.52 % Al2O3 |
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Iron 0.55 % Fe 0.79 % Fe2O3 |
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Silicon 7.52 % Si 16.09 % SiO2 |
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Boron 1.29 % B 4.14 % B2O3 |
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Arsenic 2.23 %
As 1.96 % As2O3 / 1.14 % As2O5
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Oxygen 25.39 % O |
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Fluorine 6.03 % F 6.03 % F |
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- %
F -2.54 % -O=F2 |
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______ ______ |
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100.00 % 98.33 % = TOTAL OXIDE |
| Empirical Formula: |
Y6REE5Ca3NaAl0.75Fe3+0.25Ca0.5As0.5Si0.75As0.25Si6B3O40F8 |
| Environment: |
Found embedded in REE-bearing fluorite, in a granitic pegmatite. Vicanite group. |
| IMA Status: |
Approved IMA 2006 (Dana # Added) |
| Locality: |
Hundholmen, Tysfjord, Nordland, north Norway. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Synonym: |
IMA2006-005 |
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