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Monteregianite-(Y) Mineral Data
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General Monteregianite-(Y) Information
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 Chemical Formula: |
(Na,K)6(Y,Ca)2Si16O38•10(H2O) |
| Composition: |
Molecular Weight = 1,574.86 gm |
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Potassium 4.47 % K 5.38 % K2O |
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Sodium 6.86 % Na 9.25 % Na2O |
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Calcium 0.51 % Ca 0.71 % CaO |
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Yttrium 9.60 % Y 12.19 % Y2O3 |
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Aluminum 0.34 % Al 0.65 % Al2O3 |
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Silicon 28.18 % Si 60.28 % SiO2 |
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Hydrogen 1.28 % H 11.44 % H2O |
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Oxygen 48.76 % O |
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______ ______ |
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100.00 % 99.90 % = TOTAL OXIDE |
| Empirical Formula: |
K1.8Na4.7Y1.7Ca0.2Si15.8Al0.2O38•10(H2O) |
| Environment: |
In miarolitic cavities, metamorphosed inclusions in nepheline syenite. |
| IMA Status: |
Approved IMA 1987 |
| Locality: |
Mont Saint-Hilaire, Quebec, Canada. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the Monteregian Hills, a series of intrusions. |
| Name Pronunciation: |
Monteregianite-(Y) + Pronunciation  |
| Synonym: |
ICSD 202257 |
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IMA1972-026 |
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PDF 31-1087 |
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