Jurbanite Mineral Data

Jurbanite Mineral Data +

General Jurbanite Information

Chemical Formula:

Al(SO4)(OH)·5(H2O)

Composition:

Molecular Weight = 230.13 gm

Aluminum 11.72 % Al 22.15 % Al₂O₃

Hydrogen 4.82 % H 43.06 % H₂O

Sulfur 13.93 % S 34.79 % SO₃

Oxygen 69.52 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Al(SO₄)(OH)·5(H₂O)

IMA Status:

Approved IMA 1976

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 61493

PDF 29.89

Jurbanite Image

Images:

Jurbanite

Comments: White spherical crusts of jurbanite on matrix.
Location: Le Cetine Mine, Siena, Tuscany, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Jurbanite Crystallography

Axial Ratios:

a:b:c =0.6721:1:0.6531

Cell Dimensions:

a = 8.3913, b = 12.4846, c = 8.1545, Z = 4; beta = 101.9° V = 835.92 Den(Calc)= 1.83

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/n

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

By Intensity(I/I_o): 3.723(1), 4.013(0.9), 6.8(0.8),

Crystal Structure:

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Sabelli C , Zeitschrift fur Kristallographie , 173 (1985) p.33-39, Refinement of the crystal structure of jurbanite, Al(SO4)(OH)*5H2O, Locality: Cetine mine, Tuscany, Italy

Physical Properties of Jurbanite

Cleavage:

None

Color:

Colorless.

Density:

1.786

Diaphaniety:

Transparent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Hardness:

2.5 - Finger Nail

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Jurbanite

Gladstone-Dale:

CI meas= -0.04 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.015 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2577,KPDmeas= 0.2641,KC= 0.2538

Optical Data:

Biaxial (-), a=1.459, b=1.473, g=1.483, bire=0.0240, 2V(Calc)=78, 2V(Meas)=80.

Calculated Properties of Jurbanite

Electron Density:

r_electron=1.91 gm/cc
note: r_Jurbanite=1.83 gm/cc.

Fermion Index

Fermion Index = 0.00138
Boson Index = 0.99862

Photoelectric:

PE_Jurbanite= 1.30 barns/electron
U=PE_Jurbanite x r_electron= 2.47 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Jurbanite is Not Radioactive

Jurbanite Classification

Dana Class:

31.9.10.1 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.9)where (A+ B++) (XO4) Zq·x(H2O)

(31.9.10)Dana Group

31.9.10.1 Jurbanite Al(SO4)(OH)·5(H2O) P 2₁/n 2/m

Strunz Class:

VI/D.06-10 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 Jurbanite Information

References:

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

See Also:

Links to other databases for Jurbanite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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

Jurbanite

Al(SO4)(OH)·5(H2O)
Dana No: 31.9.10.1 Strunz No: VI/D.06-10
Locality:

Notes: