Felsobanyaite Mineral Data

Felsobanyaite Mineral Data +

General Felsobanyaite Information

Chemical Formula:

Al4(SO4)(OH)10·5(H2O)

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

Empirical Formula:

Al₄(SO₄)(OH)₁₀·5(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1853

Locality:

Baia Sprie, Maramures, Romania (formerly known as Felsobanya, in Hungary). Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Felsobanyaite Image

Images:

Felsobanyaite

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

Felsobanyaite Crystallography

Axial Ratios:

a:c = 1:0.84376

Cell Dimensions:

a = 22.556, c = 19.032, Z = 24; V = 8,385.70 Den(Calc)= 2.21

Crystal System:

HexagonalSpace Group: Unk

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

By Intensity(I/I_o): 4.64(1), 4.79(1), 2.27(0.5),

Physical Properties of Felsobanyaite

Cleavage:

[001] Perfect, [100] Distinct, [010] Distinct

Color:

Colorless, Yellow, White.

Density:

2.35

Diaphaniety:

Transparent to Translucent

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Globular - Spherical, or nearly so, rounded forms (e.g. wavellite).

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Hardness:

1.5 - Between Talc and Gypsum

Luster:

Vitreous - Pearly

Optical Properties of Felsobanyaite

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

Optical Data:

Uniaxial (+), w=1.516, e=1.533, bire=0.0170.

Calculated Properties of Felsobanyaite

Electron Density:

r_electron=2.29 gm/cc
note: r_{Felsobanyaite}=2.21 gm/cc.

Fermion Index

Fermion Index = 0.00083
Boson Index = 0.99917

Photoelectric:

PE_{Felsobanyaite}= 1.20 barns/electron
U=PE_{Felsobanyaite} x r_electron= 2.74 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Felsobanyaite is Not Radioactive

Felsobanyaite Classification

Dana Class:

31.4.4.1 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.4)where (A+ B++)4 (XO4) Zq·x(H2O)

(31.4.4)Dana Group

31.4.4.1 Felsobanyaite Al4(SO4)(OH)10·5(H2O) Unk Hex

Strunz Class:

VI/D.06-60 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/D - Water-bearing sulfates with unfamiliar anions. cations of medium size

VI/D.06 - Aluminite series, Jurbanite - Zaherite

VI/D.06-10 Jurbanite Al(SO4)(OH)·5(H2O) P 2₁/n 2/m

VI/D.06-20 Khademite Al(SO4)F·5(H2O) Pcab 2/m 2/m 2/m

VI/D.06-20* Rostite AlSO4(OH,F)·5(H2O) Pcba 2/m 2/m 2/m

VI/D.06-30 Meta-aluminite Al2(SO4)(OH)4·5(H2O) P 2₁/c ? 2/m

VI/D.06-40 Aluminite Al2(SO4)(OH)4·7(H2O) P 2₁/c 2/m

VI/D.06-50 Basaluminite Al4(SO4)(OH)10·5(H2O) P 2₁ 2

VI/D.06-60 Felsobanyaite Al4(SO4)(OH)10·5(H2O) Unk Hex

VI/D.06-70 Hydrobasaluminite Al4(SO4)(OH)10·12-36(H2O) Unk. Mono

VI/D.06-80 Zaherite Al12(SO4)5(OH)26·20H20 P1 or P1 Tri

Other Felsobanyaite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Felsobanyaite :
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 11 -The Felsõbányaite¹ Page

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Felsobanyaite

Al4(SO4)(OH)10·5(H2O)
Dana No: 31.4.4.1 Strunz No: VI/D.06-60
Locality:

Notes: