Hechtsbergite Mineral Data

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.

Name Pronunciation:

Hechtsbergite + Pronunciation

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-Württemberg, 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 - Prismatic H-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

Diaphaneity:

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
Ncalc = 2.28 - 2.31

Optical Data:

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

Calculated Properties of Hechtsbergite

Electron Density:

Bulk Density (Electron Density)=5.78 gm/cc
note: Specific Gravity of Hechtsbergite =6.87 gm/cc.

Fermion Index:

Fermion Index = 0.0003074733
Boson Index = 0.9996925267

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hechtsbergite is Not Radioactive

Hechtsbergite Classification

Dana Class:

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

(41.11)with miscellaneous formulae

(41.11.06)Smrkovecite Group

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

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

Strunz Class:

08.BO.15 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BO -With only large cations, (OH, etc.):RO4 � 1:1

08.BO.15 Atelestite Bi8(AsO4)3(OH)5O5 P 2₁/a 2/m

08.BO.15 Hechtsbergite! Bi2O(OH)(VO4) P 2₁/c 2/m

08.BO.15 Smrkovecite! Bi2O(OH)(PO4) P 2₁/c 2/m

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 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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

Hechtsbergite

Bi2O(OH)(VO4)
Dana No: 41.11.06.02 Strunz No: 08.BO.15
Locality:

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