Classification of Barberiite |
| IMA status: | Approved |
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| Strunz 8th edition ID: | 3/B.01-30
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| Nickel-Strunz 10th (pending) edition ID: | 3.CA.10
3 : HALIDES
C : Complex halides
A : Borofluorides |
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| Dana 8th edition ID: | 11.2.4.1
11 : HALIDE COMPLEXES
2 : AmBX4 |
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| mindat.org URL: | http://www.mindat.org/min-513.html
Please feel free to link to this page. |
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Type Occurrence of Barberiite |
| Type Locality: | La Fossa Crater, Vulcano Island, Eolie Islands (Aeolian Islands), Lipari, Messina Province, Sicily, Italy |
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| General Appearance of Type Material: | Globular aggregates to 2 mm, rarely as pseudohexagonal platy crystals to 300 µm |
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| Place of Conservation of Type Material: | Bari University, Bari, Italy |
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| Year of Discovery: | 1994 |
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| Geological Setting of type material: | Sublimates in active fumaroles |
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| Associated Minerals at type locality: | |
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Physical Properties of Barberiite |
| Lustre: | Vitreous |
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| Diaphaneity (Transparency): | Transparent, Translucent |
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| Colour: | Colourless |
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| Streak: | White |
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| Hardness (Mohs): | 1 |
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| Hardness (Vickers): | VHN25=14.2 kg/mm2 |
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| Density (measured): | 1.89 g/cm3 |
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| Density (calculated): | 1.9 g/cm3 |
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Crystallography of Barberiite |
| Crystal System: | Orthorhombic |
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| Class (H-M): | mmm (2/m 2/m 2/m) - Dipyramidal |
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| Space Group: | Pnma {P21/n 21/m 21/a} |
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| Cell Parameters: | a = 9.0615Å, b = 5.6727Å, c = 7.2672Å
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| Ratio: | a:b:c = 1.597 : 1 : 1.281 |
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| Unit Cell Volume: | V 373.56 ų (Calculated from Unit Cell) |
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| Z: | 4 |
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| Morphology: | Commonly in globular aggregates; rarely as pseudohexagonal crystals, tabular to platy on {001}, typically elongated along [010] or [100] |
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| X-Ray Powder Diffraction: | | d-spacing | | Intensity | | 3.183 | | (100) | | 3.540 | | (90) | | 2.898 | | (80) | | 4.472 | | (75) | | 2.163 | | (70) | | 2.536 | | (65) | | 2.282 | | (65) |
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| Comments: | Recorded on material from Vulcano Island, Italy |
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Optical Data of Barberiite |
| Type: | Biaxial |
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| RI values: | n = 1.3081 |
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| 2V: | Measured: 90° |
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| Maximum Birefringence: | δ = 0.000
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration. |
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| Surface Relief: | Moderate |
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| Dispersion: | r > v, strong |
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Chemical Properties of Barberiite |
| Formula: | |
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| Essential elements: | B, F, H, N |
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| All elements listed in formula: | B, F, H, N |
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| Analytical Data: | Analysis of material from Vulcano Island, Italy, by ion exchange chromatography; empirical formula calculated after deduction of some NH4, F, Cl and Br as sal ammoniac.
Na (0.4)
K (2.2)
NH4 (16.6)
BF4 (79.8)
F (0.3)
Cl (0.6)
Br (0.1)
sum 100.0 wt.-% |
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| Empirical Formula: | |
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| Common Impurities: | K,Na |
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Relationship of Barberiite to other Species |
Related Minerals - Nickel-Strunz Grouping):
- + | |
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Other Names for Barberiite |
| 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 Barberiite |
Reference List:
- + | Caron, A. P. and Ragle, J. L. (1971): Refinement of the structure of orthorhombic ammonium tetrafluoroborate, NH4BF4. Acta Crystallographica 27, 1102-1107.
Garavelli, A. and Vurro, F. (1994): Barberiite, NH4BF4, a new mineral from Vulcano, Aeolian Islands, Italy. American Mineralogist 79, 381-384.
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 38. |
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Internet Links for Barberiite |
| Search Engines: |
Look for Barberiite on Google
Look for Barberiite images on Google |
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| External Links: | Look for Barberiite on WebmineralLook for Barberiite on Athena MineralogyLook for Barberiite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseBarberiite details from Handbook of Mineralogy (PDF) |
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| Mineral Dealers: | By minerals from YourMineralCollectionHigh-end worldwide specimens & outstanding customer serviceFind Barberiite on www.crystalclassics.co.ukBuy fine minerals and gemstones from Pala InternationalRare and Unusual minerals at Mineralogical Research CompanyWilensky Fine MineralsFine Minerals from Weinrich Minerals, Inc.Fabre Minerals - search for Barberiite specimensPricedownminerals.com - Reverse Auctions and ShopwebmineralsSpiriferMinerals.com - high quality low pricesBuy from David K Joyce minerals |
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| Jobs: | Mining & Geology Jobs |
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Localities for Barberiite |
The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the  symbol to view information about a locality.
The symbol next to localities in the list
can be used to jump to that position on the map.
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Mineral and Locality Search
