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Felsobanyaite Mineral Data

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General Felsobanyaite Information

Help on Chemical  Formula: Chemical Formula: Al4(SO4)(OH)10•5(H2O)
Help on Composition: Composition: Molecular Weight = 464.14 gm
   Aluminum  23.25 %  Al   43.94 % Al2O3
   Hydrogen   4.34 %  H    38.81 % H2O
   Sulfur     6.91 %  S    17.25 % SO3
   Oxygen    65.50 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Al4(SO4)(OH)10•5(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1853
Help on Locality: Locality: Baia Sprie, Maramures, Romania (formerly known as Felsobanya, in Hungary). Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Felsobanyaite + Pronunciation Say FELSOBANYAITE

Felsobanyaite Image

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Comments: Gray white crystalline micro grains of felsöbanyaite on brown to yellow opal.
Location: Cavnik, Felsobanya, Maramures, Romania. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Felsobanyaite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.84376
Help on Cell Dimensions: Cell Dimensions: a = 22.556, c = 19.032, Z = 24; V = 8,385.70 Den(Calc)= 2.21
Help on Crystal System: Crystal System: Hexagonal Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.64(1), 4.79(1), 2.27(0.5),

Physical Properties of Felsobanyaite

Help on Cleavage: Cleavage: {001} Perfect, {100} Distinct, {010} Distinct
Help on Color: Color: Colorless, Yellow, White.
Help on Density: Density: 2.35
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Globular - Spherical, or nearly so, rounded forms (e.g. wavellite).
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 1.5 - Between Talc and Gypsum
Help on Luster: Luster: Vitreous - Pearly

Optical Properties of Felsobanyaite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.119 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.064 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2373,KPDmeas= 0.2232,KC= 0.2534
Ncalc = 1.56 - 1.6
Help on Optical Data: Optical Data: Uniaxial (+), w=1.516, e=1.533, bire=0.0170.

Calculated Properties of Felsobanyaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.29 gm/cc
note: Specific Gravity of Felsobanyaite =2.21 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0008390436
Boson Index = 0.9991609564
Help on Photoelectric: Photoelectric: PEFelsobanyaite = 1.20 barns/electron
U=PEFelsobanyaite x rElectron Density= 2.74 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Felsobanyaite is Not Radioactive

Felsobanyaite Classification

Help on  Dana Class: Dana Class: (31)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.04)where (A+ B++)4 (XO4) Zq�x(H2O)
  (31.04.04)Dana Group Felsobanyaite Al4(SO4)(OH)10•5(H2O) Unk Hex
Help on  Strunz Class: Strunz Class: 07.DD.05 07 - SULFATES (SELENATES, TELLURATES)
  07.D - Sulfates (selenates, etc.) with additional anions, with H2O
  07.DD -With only medium-sized cations; sheets of edge-sharing octahedra
07.DD.05 Basaluminite? Al4(SO4)(OH)10•5(H2O) P 21 2
07.DD.05 Felsobanyaite Al4(SO4)(OH)10•5(H2O) Unk Hex

Other Felsobanyaite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Felsobanyaite :
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
13 - The Felsbnyaite Page

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Dana No: Strunz No: 07.DD.05





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