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Vashegyite Mineral Data

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General Vashegyite Information

Help on Chemical  Formula: Chemical Formula: Al11(PO4)9(OH)6•38(H2O) or Al6(PO4)5(OH)3•23(H2O)
Help on Composition: Composition: Molecular Weight = 1,938.16 gm
   Aluminum    15.31 %  Al   28.93 % Al2O3
   Phosphorus  14.38 %  P    32.96 % P2O5
   Hydrogen     4.26 %  H    38.11 % H2O
   Oxygen      66.04 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Al11(PO4)9(OH)6•38(H2O)
Help on Environment: Environment: Found with variscite, apatite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1909
Help on Locality: Locality: Zeleznik (Vashegy) mine, Sirk River, Slovakia, Boehmia, Czech Republic. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Vashegyite + Pronunciation Say VASHEGYITE

Vashegyite Image

Click Here for Larger   Image in a New Browser Window Images:
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  Vashegyite   Volborthite

Comments: Small bluish-white crystals of vashegyite with green volborthite.
Location: Jeremias Gl├╝ck Mine (Fairy Grotto), Garnsdorf, Saalfeld, Thuringia, Germany. Scale: Picture size 1.8 mm.
© Thomas Witzke / Abraxas-Verlag

Vashegyite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7186:1:1.3758
Help on Cell Dimensions: Cell Dimensions: a = 10.773, b = 14.991, c = 20.626, Z = 2; V = 3,331.06 Den(Calc)= 1.93
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: Pna2 or P na21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 10.3(1), 2.912(0.9), 7.5(0.8),

Physical Properties of Vashegyite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Brownish, Brownish yellow, Yellow, White, Light green.
Help on Density: Density: 1.93 - 1.99, Average = 1.96
Help on Diaphaneity: Diaphaneity: Subtranslucent to Opaque
Help on Habit: Habit: Compact - Occurs as a compact mass.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Earthy (Dull)
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white

Optical Properties of Vashegyite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.027 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.012 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2468,KPDmeas= 0.243,KC= 0.2498
Ncalc = 1.48 - 1.5
Help on Optical Data: Optical Data: Biaxial (-), a=1.47, b=1.477, g=1.482, bire=0.0120

Calculated Properties of Vashegyite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.99 gm/cc
note: Specific Gravity of Vashegyite =1.93 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0003233858
Boson Index = 0.9996766142
Help on Photoelectric: Photoelectric: PEVashegyite = 1.23 barns/electron
U=PEVashegyite x rElectron Density= 2.45 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Vashegyite is Not Radioactive

Vashegyite Classification

Help on  Dana Class: Dana Class: (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.12)with miscellaneous formulae
  (42.12.02)Dana Group Vashegyite Al11(PO4)9(OH)6•38(H2O)orAl6(PO4)5(OH)3•23(H2O) Pna2 or P na21 mm2
Help on  Strunz Class: Strunz Class: 08.DB.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DB -With only medium-sized cations, (OH, etc.):RO4 < 1:1
08.DB.10 Vashegyite Al11(PO4)9(OH)6•38(H2O)orAl6(PO4)5(OH)3•23(H2O) Pna2 or P na21 mm2

Other Vashegyite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Vashegyite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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


Al11(PO4)9(OH)6•38(H2O) or Al6(PO4)5(OH)3•23(H2O)
Dana No: Strunz No: 08.DB.10





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