Vashegyite Mineral Data + Say VASHEGYITE

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.
 

Vashegyite Image

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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 - PyramidalH-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 Diaphaniety: Diaphaniety: 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
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:

relectron=1.99 gm/cc
note: rVashegyite =1.93 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00032
Boson Index = 0.99968
Help on Photoelectric: Photoelectric:

PEVashegyite = 1.23 barns/electron
U=PEVashegyite x relectron= 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: 42.12.2.1 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.12)with miscellaneous formulae
  (42.12.2)Dana Group
 
42.12.2.1 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: VII/D.12-10 VII - Phosphates, Arsenates and Vanadates
  VII/D - Water-bearing phosphates with unfamiliar anions, cations of medium size: Cu, Zn, Mn, Al, Fe
  VII/D.12 - Sasaite - Kribergite ? series
 
VII/D.12-03 Mitryaevaite! Al5[(PO4)2[(P,S)O3(OH,O)]2F2(OH)2(H2O)8·6.48(H2O) P1 1
 
VII/D.12-05 Sasaite (Al,Fe)14(PO4)11(SO4)(OH)7·84(H2O) P 222 or Pmm2 or P mmm Ortho
 
VII/D.12-10 Vashegyite Al11(PO4)9(OH)6·38(H2O)orAl6(PO4)5(OH)3·23(H2O) Pna2 or P na21 mm2
 
VII/D.12-20 Vantasselite Al4(PO4)3(OH)3·9(H2O) Pma2,P 21am,Pmam Ortho
 
VII/D.12-30 Sanjuanite Al2(PO4)(SO4)(OH)·9(H2O) P1 or P1 Tri
 
VII/D.12-40 Kribergite Al5(PO4)3(SO4)(OH)4·4(H2O) P1 or P1 Tri
 

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 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris

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Vashegyite

Al11(PO4)9(OH)6·38(H2O) or Al6(PO4)5(OH)3·23(H2O)
Dana No: 42.12.2.1 Strunz No: VII/D.12-10
Locality:

 

Notes:

 

 
   
 
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