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Vyuntspakhkite-(Y) Mineral Data
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General Vyuntspakhkite-(Y) Information
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Chemical Formula: |
(Y,Yb,Er)4Al2AlSi5O18(OH)5 |
Composition: |
Molecular Weight = 1,118.90 gm |
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La,Ce,Pr,Nd,Sm, 12.61 % RE 14.71 % REE2O3 |
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Yttrium 14.14 % Y 17.96 % Y2O3 |
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Ytterbium 20.26 % Yb 23.07 % Yb2O3 |
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Aluminum 7.31 % Al 13.81 % Al2O3 |
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Silicon 12.40 % Si 26.53 % SiO2 |
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Hydrogen 0.45 % H 3.99 % H2O |
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Oxygen 32.83 % O |
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______ ______ |
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100.00 % 100.07 % = TOTAL OXIDE |
Empirical Formula: |
Y1.78Yb1.31REE0.98Al3.03Si4.94O18(OH)4.96 |
Environment: |
Two generations of crystals occur in fluorite in "amazonite" pegmatites. |
IMA Status: |
Approved IMA 1987 |
Locality: |
Mt. Vyuntspakhk, 5 km southeast of Mt. Ploskaya, Kola Peninsula, Russia. Link to MinDat.org Location Data. |
Name Origin: |
Named for the locality and its yttrium content. |
Name Pronunciation: |
Vyuntspakhkite-(Y) + Pronunciation |
Synonym: |
ICSD 20861 |
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PDF 35-708 |
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