Barberiite Mineral Data

Barberiite Mineral Data +

General Barberiite Information

Chemical Formula:

(NH4)BF4

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

Empirical Formula:

(NH₄)BF₄

IMA Status:

Approved IMA 1994

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 9918

PDF 47-1762

Barberiite Image

Images:

Barberiite

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

Barberiite Crystallography

Axial Ratios:

a:b:c =1.5973:1:1.281

Cell Dimensions:

a = 9.0615, b = 5.6727, c = 7.2672, Z = 4; V = 373.56 Den(Calc)= 1.86

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P nma

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.183(1), 3.54(0.9), 2.8982(0.8),

Physical Properties of Barberiite

Cleavage:

[100] Perfect, [010] Good, [001] Good

Color:

Colorless.

Density:

1.89

Diaphaniety:

Transparent

Hardness:

1 - Talc

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Barberiite

Gladstone-Dale:

CI meas= -0.545 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.57 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1656,KPDmeas= 0.163,KC= 0.1055

Optical Data:

Biaxial (+/-), b=1.308, 2V(Meas)=90.

Calculated Properties of Barberiite

Electron Density:

r_electron=1.87 gm/cc
note: r_Barberiite=1.89 gm/cc.

Fermion Index

Fermion Index = 0.15362
Boson Index = 0.84638

Photoelectric:

PE_Barberiite= 0.52 barns/electron
U=PE_Barberiite x r_electron= 0.97 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Barberiite is Not Radioactive

Barberiite Classification

Dana Class:

11.2.4.1 (11)Halide Complexes; Alumino-fluorides

(11.2)where (A)m B (X)4

(11.2.4)Dana Group

11.2.4.1 Barberiite (NH4)BF4 P nma 2/m 2/m 2/m

Strunz Class:

III/B.01-30 III - Halogenides

III/B - Double halogenides without water, with [BF4]1-,[SiF6]2- and [AlF6]3-

III/B.01 - Ferruccite - Barberiite series

III/B.01-10 Ferruccite NaBF4 C mcm 2/m 2/m 2/m

III/B.01-20 Avogadrite (K,Cs)BF4 P nma 2/m 2/m 2/m

III/B.01-30 Barberiite (NH4)BF4 P nma 2/m 2/m 2/m

Other Barberiite Information

References:

PHYS. PROP.(Am.Min.,Vol.79,p381-384,1994) OPTIC PROP.(Am.Min.,Vol.79,p381-384,1994)

See Also:

Links to other databases for Barberiite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Print or Cut-and-Paste your Barberiite Specimen Label here :

Barberiite

(NH4)BF4
Dana No: 11.2.4.1 Strunz No: III/B.01-30
Locality:

Notes: