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Esperanzaite Mineral Data
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General Esperanzaite Information
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 Chemical Formula: |
NaCa2Al2(As+++++O4)2F4(OH)•2(H2O) |
| Composition: |
Molecular Weight = 563.98 gm |
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Sodium 4.08 % Na 5.49 % Na2O |
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Calcium 14.21 % Ca 19.89 % CaO |
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Aluminum 9.57 % Al 18.08 % Al2O3 |
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Arsenic 26.57 % As 40.75 % As2O5 |
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Hydrogen 0.89 % H 7.99 % H2O |
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Oxygen 31.21 % O |
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Fluorine 13.47 % F 13.47 % F |
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- %
F -5.67 % -O=F2 |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
NaCa2Al2(AsO4)2F4(OH)•2(H2O) |
| Environment: |
Found as a secondary phase on mineralized rhyolite. |
| IMA Status: |
Approved IMA 1999 (Dana # Added) |
| Locality: |
La Esperanza mine, Zaragosa mining district, near Madero, State of Durango, Mexico. Link to MinDat.org Location Data. |
| Name Origin: |
Named after the discovery locality. |
| Name Pronunciation: |
Esperanzaite + Pronunciation  |
| Synonym: |
IMA1998-025 |
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