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Francoanellite Mineral Data
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General Francoanellite Information
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 Chemical Formula: |
H6(K,Na)3(Al,Fe+++)5(PO4)8•13(H2O) |
| Composition: |
Molecular Weight = 1,242.49 gm |
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Potassium 4.72 % K 5.69 % K2O |
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Sodium 2.78 % Na 3.74 % Na2O |
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Aluminum 9.77 % Al 18.46 % Al2O3 |
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Iron 2.25 % Fe 3.21 % Fe2O3 |
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Phosphorus 19.94 % P 45.70 % P2O5 |
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Hydrogen 2.60 % H 23.20 % H2O |
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Oxygen 57.95 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
H6K1.5Na1.5Al4.5Fe3+0.5(PO4)8•13(H2O) |
| Environment: |
Occurs at the contact of "terra rossa" with bat guano in the karst cave. |
| IMA Status: |
Approved IMA 1976 |
| Locality: |
Grotte di Castellana, Puglia, Italy. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Franco Anelli, professor of geography, University of Bari, Italy, who discovered the cave in which the mineral was found. |
| Name Pronunciation: |
Francoanellite + Pronunciation  |
| Synonym: |
ICSD 407357 |
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PDF 29-980 |
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