Hechtsbergite Mineral Data

Hechtsbergite Mineral Data +

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General Hechtsbergite Information

Chemical Formula:

Bi2O(OH)(VO4)

Composition:

Molecular Weight = 565.91 gm

Vanadium 9.00 % V 16.07 % V₂O₅

Bismuth 73.86 % Bi 82.34 % Bi₂O₃

Hydrogen 0.18 % H 1.59 % H₂O

Oxygen 16.96 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Bi₂O(OH)(VO₄)

Environment:

In minute cavities in gneiss quarried for road-building material. The vanadium-dominant analog of atelestite and, probably, smrkovecite.

IMA Status:

Approved IMA 1995 (Dana # Added)

Locality:

Hechtsberg quarry at Hausach, Black Forest, Germany. Link to MinDat.org Location Data.

Name Origin:

Named after the locality.

Synonym:

ICSD 85180

IMA1995-050

Hechtsbergite Image

Images:

Hechtsbergite

Comments: Light brownish crystals of hechtsbergite in matrix.
Location: Hechtsberg Quarry, Hausach, Kinzig Valley, Black Forest, Baden-W?rttemberg, Germany. Scale: Picture size 1.3 mm.
© Thomas Witzke / Abraxas-Verlag

Hechtsbergite Crystallography

Axial Ratios:

a:b:c =0.9012:1:1.444

Cell Dimensions:

a = 6.791, b = 7.535, c = 10.881, Z = 4; beta = 107° V = 532.45 Den(Calc)= 7.06

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/c

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

By Intensity(I/I_o): 3.267(1), 3.15(0.62), 4.279(0.38),

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Forms: [ 3 0 2] [ 0 0 1] [ 1 1 3] [ 1 1 1]

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Physical Properties of Hechtsbergite

Cleavage:

None

Color:

Brown.

Density:

6.87

Diaphaniety:

Transparent to translucent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Adamantine

Streak:

yellow

Optical Properties of Hechtsbergite

Gladstone-Dale:

CI meas= 0.001 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1808,KPDmeas= 0.1858,KC= 0.186

Optical Data:

Biaxial (+), a=2.26, b=2.27, g=2.3, bire=0.0400

Calculated Properties of Hechtsbergite

Electron Density:

r_electron=5.78 gm/cc
note: r_{Hechtsbergite}=6.87 gm/cc.

Fermion Index

Fermion Index = 0.0003
Boson Index = 0.9997

Photoelectric:

PE_{Hechtsbergite}=1,415.05 barns/electron
U=PE_{Hechtsbergite} x r_electron=8,176.95 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Hechtsbergite is Not Radioactive

Hechtsbergite Classification

Dana Class:

41.11.6.2 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.11)with miscellaneous formulae

(41.11.6)Dana Group

41.11.6.1 Smrkovecite! Bi2O(OH)(PO4) P 2₁/c 2/m

41.11.6.2 Hechtsbergite ! Bi2O(OH)(VO4) P 2₁/c 2/m

Strunz Class:

VII/B.30-03 VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O, OH. cations of medium and big size: Mg, Cu, Zn, and Ca, Na, K, Ba, Pb

VII/B.30 - Petitjeanite - Kuznetsovite series

VII/B.30-01 Smrkovecite! Bi2O(OH)(PO4) P 2₁/c 2/m

VII/B.30-02 Atelestite Bi8(AsO4)3(OH)5O5 P 2₁/a 2/m

VII/B.30-03 Hechtsbergite Bi2O(OH)(VO4) P 2₁/c 2/m

VII/B.30-05 Petitjeanite Bi3(PO4)2O(OH) P1 1

VII/B.30-10 Preisingerite Bi3(AsO4)2O(OH) P1 1

VII/B.30-20 Schumacherite Bi3[(V,As,P)O4]2O(OH) P1 1

VII/B.30-30 Kuznetsovite! Hg3Cl(AsO4) P 2₁3 2 3

Other Hechtsbergite Information

References:

NAME( AmMin) PHYS. PROP.(Am.Min.,Vol.83,p400,1998) OPTIC PROP.(AmMin)

See Also:

Links to other databases for Hechtsbergite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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

Hechtsbergite

Bi2O(OH)(VO4)
Dana No: 41.11.6.2 Strunz No: VII/B.30-03
Locality:

Notes: