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Delhayelite Mineral Data
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General Delhayelite Information
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 Chemical Formula: |
(Na,K)10Ca5Al6Si32O80(Cl2,F2,SO4)3•18(H2O) |
| Composition: |
Molecular Weight = 3,231.17 gm |
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Potassium 3.03 % K 3.64 % K2O |
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Sodium 5.34 % Na 7.19 % Na2O |
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Calcium 6.20 % Ca 8.68 % CaO |
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Aluminum 5.01 % Al 9.47 % Al2O3 |
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Silicon 27.81 % Si 59.50 % SiO2 |
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Hydrogen 1.12 % H 10.04 % H2O |
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Sulfur 0.60 % S 1.49 % SO3 |
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Chlorine 0.77 % Cl 0.77 % Cl |
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- %
Cl -0.17 % -O=Cl2 |
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Oxygen 49.71 % O |
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Fluorine 0.41 % F 0.41 % F |
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- %
F -0.17 % -O=F2 |
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______ ______ |
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100.00 % 100.84 % = TOTAL OXIDE |
| Empirical Formula: |
Na7.5K2.5Ca5Al6Si32O80Cl0.7F0.7(SO4)0.6�18(H2O) |
| Environment: |
In a kalsilite-bearing melitlite-nepheline lava. |
| IMA Status: |
Approved IMA 1959 |
| Locality: |
On Mt. Sharheru, the extinct southern cone of Mt. Nyiragongo, Kivu Province, Zaire. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Fernard Delhaye (1880-1946), Belgian geologist, a pioneer in the geological exploration of the northern Kivu region of Zaire. |
| Name Pronunciation: |
Delhayelite + Pronunciation  |
| Synonym: |
ICSD 24616 |
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PDF 12-286 |
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