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)

Environment:

Secondary crusts in humid tunnels in oxidized portions of sulfide deposits in aluminous rocks; apparently deposited directly from mine water at about 27 deg C and 100% humidity.

IMA Status:

Approved IMA 1976

Locality:

San Manuel mine, Mammoth district, Pinal Co., Arizona, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Joseph John Urban (1915-1997), Tucson, Arizona, USA, mineral collector who first observed the natural material.

Name Pronunciation:

Jurbanite + Pronunciation

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 - Prismatic H-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),

Physical Properties of Jurbanite

Cleavage:

None

Color:

Colorless.

Density:

1.786

Diaphaneity:

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
Ncalc = 1.45 - 1.46

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:

Bulk Density (Electron Density)=1.91 gm/cc
note: Specific Gravity of Jurbanite =1.83 gm/cc.

Fermion Index:

Fermion Index = 0.0013859852
Boson Index = 0.9986140148

Photoelectric:

PE_Jurbanite= 1.30 barns/electron
U=PE_Jurbanite x rElectron Density= 2.47 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Jurbanite is Not Radioactive

Jurbanite Classification

Dana Class:

31.09.10.01 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.09)where (A+ B++) (XO4) Zqï¿½x(H2O)

(31.09.10)Dana Group

31.09.10.01 Jurbanite Al(SO4)(OH)•5(H2O) P 2₁/n 2/m

Strunz Class:

07.DB.15 07 - SULFATES (SELENATES, TELLURATES)

07.D - Sulfates (selenates, etc.) with additional anions, with H2O

07.DB -With only medium-sized cations; insular octahedra and finite groups

07.DB.15 Jurbanite Al(SO4)(OH)•5(H2O) P 2₁/n 2/m

Other Jurbanite Information

References:

NAME( AntBidBlaNic5) 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 - 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
15 - WWW-MINCRYST

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

Jurbanite

Al(SO4)(OH)•5(H2O)
Dana No: 31.09.10.01 Strunz No: 07.DB.15
Locality:

Notes:

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