Swedenborgite Mineral Data

Swedenborgite Mineral Data +

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General Swedenborgite Information

Chemical Formula:

NaBe4SbO7

Composition:

Molecular Weight = 292.78 gm

Sodium 7.85 % Na 10.58 % Na₂O

Beryllium 12.31 % Be 34.17 % BeO

Antimony 41.58 % Sb 55.24 % Sb₂O₅

Oxygen 38.25 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaBe₄SbO₇

IMA Status:

Valid Species (Pre-IMA) 1924

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 27599

PDF 23-656

Swedenborgite Image

Images:

Swedenborgite

Comments: Water clear, prismatic crystal of swedenborgite on matrix. Under UV light it glows intense blue.
Location: Langban, Varmland, Sweden. Scale: Crystal size 1 mm.
© Tom Loomis / Dakota Matrix

Swedenborgite Crystallography

Axial Ratios:

a:c = 1:1.62587

Cell Dimensions:

a = 5.442, c = 8.848, Z = 2; V = 226.93 Den(Calc)= 4.28

Crystal System:

Hexagonal - Dihexagonal PyramidalH-M Symbol (6mm) Space Group: P 6₃mc

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

By Intensity(I/I_o): 4.2(1), 2.51(0.9), 2.72(0.9),

Forms:

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Forms: [ 1 1 1] [ 1 1 0] [ 0 0 1]

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Crystal Structure:

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Pauling L , Klug H P , Winchell A N , American Mineralogist , 20 (1935) p.492-501, The crystal structure of swedenborgite, NaBe4SbO7

View Additional jPOWD Structure files for Swedenborgite
[1]

Physical Properties of Swedenborgite

Cleavage:

[0001] Distinct

Color:

Brownish yellow, Colorless, Honey yellow, Light yellow.

Density:

4.285

Diaphaniety:

Transparent

Fracture:

Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.

Hardness:

8 - Topaz

Luminescence:

Fluorescent.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Swedenborgite

Dichroism (e):

colorless.

Dichroism (w):

colorless.

Gladstone-Dale:

CI meas= 0.036 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.035 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1801,KPDmeas= 0.1799,KC= 0.1866

Optical Data:

Uniaxial (-), e=1.77, w=1.772, bire=0.0020.

Calculated Properties of Swedenborgite

Electron Density:

r_electron=3.92 gm/cc
note: r_{Swedenborgite}=4.28 gm/cc.

Fermion Index

Fermion Index = 0.1233
Boson Index = 0.8767

Photoelectric:

PE_{Swedenborgite}= 133.86 barns/electron
U=PE_{Swedenborgite} x r_electron= 524.42 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Swedenborgite is Not Radioactive

Swedenborgite Classification

Dana Class:

44.3.1.1 (44)Antimonates

(44.3)with miscellaneous formulae

(44.3.1)Dana Group

44.3.1.1 Swedenborgite NaBe4SbO7 P 6₃mc 6mm

Strunz Class:

IV/B.07-50 IV - Oxides

IV/B - Oxides with metal : oxygen = 3:4 (spinel type M3O4 and related)

IV/B.07 - Chrysoberyl - Swedenburgite series

IV/B.07-10 Chrysoberyl BeAl2O4 Pmnb 2/m 2/m 2/m

IV/B.07-20 Magnesiotaaffeite-2N2S Mg3Al8BeO16 P 6₃mc 6mm

IV/B.07-30 Magnesiotaaffeite-6N3S (Mg,Fe,Zn)2Al6BeO12 R 3m 3 2/m

IV/B.07-40 Ferrotaaffeite-6N3S (Fe,Zn,Mg)2Al6BeO12 R 3m 3 2/m

IV/B.07-50 Swedenborgite NaBe4SbO7 P 6₃mc 6mm

Other Swedenborgite 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 Swedenborgite :
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 Swedenborgite Specimen Label here :

Swedenborgite

NaBe4SbO7
Dana No: 44.3.1.1 Strunz No: IV/B.07-50
Locality:

Notes: