Classification of Francoanellite |
| IMA status: | Approved |
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| Strunz 8th edition ID: | 7/C.21-10
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| Nickel-Strunz 10th (pending) edition ID: | 8.CH.25
8 : PHOSPHATES, ARSENATES, VANADATES C : Phosphates without additional anions, with H2O H : With large and medium-sized cations, RO4:H2O < 1:1 |
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| Dana 8th edition ID: | 39.3.5.2
39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES 3 : Miscellaneous |
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| Hey's CIM Ref.: | 19.8.8
19 : Phosphates 8 : Phosphates of Al and other metals |
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| mindat.org URL: | http://www.mindat.org/min-1593.html Please feel free to link to this page. |
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Type Occurrence of Francoanellite |
| Type Locality: | Castellana Caves, Bari Province, Puglia, Italy |
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| Year of Discovery: | 1976 |
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Physical Properties of Francoanellite |
| Colour: | Yellowish white |
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| Streak: | White |
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| Hardness (Mohs): | 1 - 2 |
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Crystallography of Francoanellite |
| Crystal System: | Trigonal |
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| Cell Parameters: | a = 8.71Å, c = 82.5Å
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| Ratio: | a:c = 1 : 9.472 |
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| Unit Cell Volume: | V 5,420.27 ų (Calculated from Unit Cell) |
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Optical Data of Francoanellite |
| Type: | Uniaxial (+) |
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| RI values: | nω = 1.510 nε = 1.515 |
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| Maximum Birefringence: | δ = 0.005
 Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration. |
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| Surface Relief: | Low |
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Chemical Properties of Francoanellite |
| Formula: | |
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| Essential elements: | Al, H, K, O, P |
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| All elements listed in formula: | Al, H, K, O, P |
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Relationship of Francoanellite to other Species |
Related Minerals - Nickel-Strunz Grouping):
- + | |
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Related Minerals - Hey's Index Grouping:
- + | |
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Other Names for Francoanellite |
| Synonyms: | |
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| Other Languages: | |
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Other Information |
| Health Warning: | No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care. |
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References for Francoanellite |
| Reference List: | American Mineralogist: 61: 1054.
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Internet Links for Francoanellite |
| Search Engines: |
Look for Francoanellite on Google
Look for Francoanellite images on Google |
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| External Links: | Look for Francoanellite on WebmineralLook for Francoanellite on Athena MineralogyLook for Francoanellite on WikipediaLook for Francoanellite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Francoanellite in the Natural History Museum (London) online catalogueFrancoanellite details from Handbook of Mineralogy (PDF) |
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| Jobs: | Mining & Geology Jobs |
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Localities for Francoanellite |