Mindat Logo

Barberiite

This page is currently not sponsored. Click here to sponsor this page.



Formula:
(NH
 
4
)[BF
 
4
]
System:OrthorhombicColour:Colourless
Lustre:VitreousHardness:1
Name:For Franco Barberi, Professor of Volcanology, University of Pisa, Pisa, Italy, who promoted studies of Vulcano Island.


Formed by fumarolic activity, stable only at ground temperatures between 200 and 600°C. Decomposes in humid air.

Classification of Barberiite

IMA status:Approved
Strunz 8th edition ID:3/B.01-30
Nickel-Strunz 10th (pending) edition ID:3.CA.10

3 : HALIDES
C : Complex halides
A : Borofluorides
Dana 8th edition ID:11.2.4.1

11 : HALIDE COMPLEXES
2 : AmBX4
mindat.org URL:http://www.mindat.org/min-513.html
Please feel free to link to this page.

Type Occurrence of Barberiite

Type Locality:La Fossa crater, Vulcano Island, Lipari, Eolie Islands (Aeolian Islands), Messina Province, Sicily, Italy
General Appearance of Type Material:Globular aggregates to 2 mm, rarely as pseudohexagonal platy crystals to 300 µm
Place of Conservation of Type Material:Bari University, Bari, Italy
Year of Discovery:1994
Geological Setting of type material:Sublimates in active fumaroles
Associated Minerals at type locality:
SulphurSphaleriteSassoliteSalammoniacRealgar
MalladriteGalenobismutiteCannizzariteBismuthinite

Physical Properties of Barberiite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent, Translucent
Colour:Colourless
Streak:White
Hardness (Mohs):1
Hardness (Vickers):VHN25=14.2 kg/mm2
Density (measured):1.89 g/cm3
Density (calculated):1.9 g/cm3

Crystallography of Barberiite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Pnma {P21/n 21/m 21/a}
Cell Parameters:a = 9.0615Å, b = 5.6727Å, c = 7.2672Å
Ratio:a:b:c = 1.597 : 1 : 1.281
Unit Cell Volume:V 373.56 ų (Calculated from Unit Cell)
Z:4
Morphology:Commonly in globular aggregates; rarely as pseudohexagonal crystals, tabular to platy on {001}, typically elongated along [010] or [100]
X-Ray Powder Diffraction:
d-spacingIntensity
3.183 (100)
3.540 (90)
2.898 (80)
4.472 (75)
2.163 (70)
2.536 (65)
2.282 (65)
Comments:Recorded on material from Vulcano Island, Italy

Optical Data of Barberiite

Type:Biaxial
RI values: n = 1.3081
2V:Measured: 90°
Maximum Birefringence:δ = 0.000

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r > v, strong

Chemical Properties of Barberiite

Formula:
(NH
 
4
)[BF
 
4
]
Simplified for copy/paste:(NH4)[BF4]
Essential elements:B, F, H, N
All elements listed in formula:B, F, H, N
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.-%
Empirical Formula:
[(NH4)
 
0.96
K
 
0.06
Na
 
0.02
]
 
=1.04
BF
 
4
Common Impurities:K,Na

Relationship of Barberiite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
3.CA.05Ferruccite
Na[BF
 
4
]
3.CA.10Avogadrite
(K,Cs)[BF
 
4
]

Other Names for Barberiite

Synonyms:
IMA1993-008
Other Languages:
German:Barberiit
Russian:Барбериит
Spanish:Barberiita

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.

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.

Internet Links for Barberiite

Search Engines:
  • Look for Barberiite on Google
  • Look for Barberiite images on Google
  • External Links:
  • Look for Barberiite on Webmineral
  • Look for Barberiite on Athena Mineralogy
  • Look for Barberiite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Barberiite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
  • Buy from McDougall Minerals
  • Buy RARE Minerals from Rocks of Africa
  • Buy from David K Joyce minerals
  • Lapis Mineral Magazin
  • Barberiite specimens for sale - minfind.com
  • SpiriferMinerals.com - high quality low prices
  • Search for Barberiite on Well-Arranged Molecules
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Rare and Unusual minerals at Mineralogical Research Company
  • rare and unusual minerals mainly crystallized
  • Top quality minerals from Kristalle of California
  • Fine and rare minerals from mintreasure.com
  • 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.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Germany
     
    • North Rhine-Westphalia
      • Aachen
        • Alsdorf
    EDX and XRD-analysed by Günter Blaß ; matches PDF 47-1762 (and the former PDF 15-745)
    Italy
     
    • Sicily
      • Messina Province
        • Eolie Islands (Aeolian Islands)
          • Lipari
            • Vulcano Island
    GARAVELLI A., VURRO F. (1997): Barberiite, NH4BF4, a new mineral from Vulcano, Aeolian Islands, Italy. - American Mineralogist - 79, 381-384.
    Tajikistan
     
    • Viloyati Sogd (Viloyati Sughd; Viloyati Khodzhent; Viloyati Leninabad)
      • Zeravshan Range
        • Yagnob River
    Pavel M. Kartashov analytical data
    Mineral and/or Locality  
    Search Google  
    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
    Current server date and time: August 4, 2014 13:15:44
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds