Fluoborite Mineral Data

Fluoborite Mineral Data +

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General Fluoborite Information

Chemical Formula:

Mg3(BO3)(F,OH)3

Composition:

Molecular Weight = 168.72 gm

Magnesium 43.22 % Mg 71.66 % MgO

Boron 6.41 % B 20.63 % B₂O₃

Hydrogen 0.30 % H 2.67 % H₂O

Oxygen 33.19 % O

Fluorine 16.89 % F 16.89 % F

- % F -7.11 % -O=F₂

______ ______

100.00 % 104.74 % = TOTAL OXIDE

Empirical Formula:

Mg₃(BO₃)F_1.5(OH)_0.5

IMA Status:

Valid Species (Pre-IMA) 1926

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 4226

PDF 19-468

Fluoborite Image

Images:

Fluoborite

Comments: Silky fibrous fluoborite with purple fluorite.
Location: Ludlaw, San Bernardino County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Fluoborite Crystallography

Axial Ratios:

a:c = 1:0.34905

Cell Dimensions:

a = 8.924, c = 3.115, Z = 2; V = 214.84 Den(Calc)= 2.61

Crystal System:

Hexagonal - DipyramidalH-M Symbol (6/m) Space Group: P 6₃/m

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

By Intensity(I/I_o): 4.41(1), 2.41(0.95), 2.12(0.9),

Crystal Structure:

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Camara F , Ottolini L , American Mineralogist , 85 (2000) p.103-107, New data on the crystal-chemistry of fluoborite, by means of SREF, SIMS and EMP analysis, Sample: Fbor 2V-43 n.2

View Additional jPOWD Structure files for Fluoborite
[1] [2]

Physical Properties of Fluoborite

Cleavage:

[0001] Indistinct

Color:

Colorless, Violet, White.

Density:

2.89

Diaphaniety:

Transparent

Hardness:

3.5 - Copper Penny

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Silky

Magnetism:

Nonmagnetic

Streak:

white

Optical Properties of Fluoborite

Gladstone-Dale:

CI meas= 0.067 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.033 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2115,KPDmeas= 0.191,KC= 0.2047

Optical Data:

Uniaxial (-), e=1.534, w=1.57, bire=0.0360.

Calculated Properties of Fluoborite

Electron Density:

r_electron=2.57 gm/cc
note: r_Fluoborite=2.61 gm/cc.

Fermion Index

Fermion Index = 0.05612
Boson Index = 0.94388

Photoelectric:

PE_Fluoborite= 1.10 barns/electron
U=PE_Fluoborite x r_electron= 2.82 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Fluoborite is Not Radioactive

Fluoborite Classification

Dana Class:

25.1.2.1 (25)Anhydrous Borates Containing Hydroxyl or Halogen

(25.1)Dana Type

(25.1.2)Dana Group

25.1.2.1 Fluoborite Mg3(BO3)(F,OH)3 P 6₃/m 6/m

Strunz Class:

V/G.05-10 V - Nitrates, Carbonates and Borates

V/G - "Insel" borates [BO3]3- "inseln"

V/G.05 - Fluoborite - Painite series

V/G.05-10 Fluoborite Mg3(BO3)(F,OH)3 P 6₃/m 6/m

V/G.05-20 Karlite! (Mg,Al)6(BO3)3(OH,Cl)4 P 2₁2₁2₁ 2 2 2

V/G.05-30 Jeremejevite Al6B5O15(F,OH)3 P 6₃/m 6/m

V/G.05-40 Painite CaZrB[Al9O18] P 6₃/m 6/m

Other Fluoborite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Fluoborite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Palache)
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - MinMax(Deutsch)
12 - MinMax(English)
13 - Mineralienatlas (Deutsch)
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - Scandinavian mineral gallery
17 - WWW-MINCRYST

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

Fluoborite

Mg3(BO3)(F,OH)3
Dana No: 25.1.2.1 Strunz No: V/G.05-10
Locality:

Notes: