Mineralogy Database

Barberiite Mineral Data

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General Barberiite Information

Help on Chemical  Formula: Chemical Formula: (NH4)BF4
Help on Composition: Composition: Molecular Weight = 104.84 gm
   Boron     10.31 %  B    33.20 % B2O3
   Hydrogen   3.85 %  H      -   % Calc as (NH4)2O
   Nitrogen  13.36 %  N    24.84 % (NH4)2O
   Fluorine  72.48 %  F    72.48 % F
               -   %   F   -30.52 % -O=F2    
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: (NH4)BF4
Help on Environment: Environment: Found in a fumarole at <= 600 deg. C.
Help on IMA Status: IMA Status: Approved IMA 1994
Help on Locality: Locality: Fossa crater on Vulcano, Aeolian Islands, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Franco Barberi, Italian volcanologist, University of Pisa, Italy.
Help on Name Pronunciation: Name Pronunciation: Barberiite + Pronunciation Say BARBERIITE
Help on Synonym: Synonym: ICSD 9918
  PDF 47-1762

Barberiite Image

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Comments: Thin, colorless, tabular blades of barberiite crystals.
Location: Vulcano, Italy. Scale: 1 mm.
© Thomas Witzke / Abraxas-Verlag

Barberiite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.5973:1:1.281
Help on Cell Dimensions: Cell Dimensions: a = 9.0615, b = 5.6727, c = 7.2672, Z = 4; V = 373.56 Den(Calc)= 1.86
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.183(1), 3.54(0.9), 2.8982(0.8),

Physical Properties of Barberiite

Help on Cleavage: Cleavage: {100} Perfect, {010} Good, {001} Good
Help on Color: Color: Colorless.
Help on Density: Density: 1.89
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 1 - Talc
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Barberiite

Help on Optical Data: Optical Data: Biaxial (+/-), b=1.308, 2V(Meas)=90. Dispersion Calculated β index.

Calculated Properties of Barberiite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.85 gm/cc
note: Specific Gravity of Barberiite =1.86 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.15
Boson Index = 0.85
Help on Photoelectric: Photoelectric: PEBarberiite = 0.52 barns/electron
U=PEBarberiite x rElectron Density= 0.95 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Barberiite is Not Radioactive

Barberiite Classification

Help on  Dana Class: Dana Class: (11)Halide Complexes; Alumino-fluorides
  (11.02)where (A)m B (X)4
  (11.02.04)Dana Group Barberiite (NH4)BF4 P nma 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 03.CA.10 03 - HALIDES
  03.C - Complex Halides
  03.CA -Borofluorides
03.CA.10 Avogadrite (K,Cs)BF4 P nma 2/m 2/m 2/m
03.CA.10 Barberiite (NH4)BF4 P nma 2/m 2/m 2/m

Other Barberiite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.79,p381-384,1994) OPTIC PROP.(Am.Min.,Vol.79,p381-384,1994)
Help on See Also: See Also: Links to other databases for Barberiite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 03.CA.10





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