Basaluminite Mineral Data

General Basaluminite 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)

Environment:

Basaluminite (1948) is Felsobï¿½nyaite (1853)

IMA Status:

Discredited IMA 2006

Locality:

Irchester, Northamptonshire and Clifton Hill, Brighton, Sussex, England. Link to MinDat.org Location Data.

Name Origin:

Named from the composition (basic sulfate of aluminum).

Name Pronunciation:

Basaluminite + Pronunciation

Basaluminite Image

Images:

Basaluminite

Comments: Clear, radial sprays of basaluminite crystals.
Location: Lavender Pit, Bisbee, Cochise County, Arizona, USA. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Basaluminite Crystallography

Axial Ratios:

a:b:c =1.2948:1:1.1059

Cell Dimensions:

a = 12.954, b = 10.004, c = 11.064, Z = 4; beta = 104.1° V = 1,390.61 Den(Calc)= 2.22

Crystal System:

Monoclinic - Sphenoidal H-M Symbol (2) Space Group: P 2₁

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

By Intensity(I/I_o): 9.4(1), 4.68(0.8), 3.68(0.7),

Physical Properties of Basaluminite

Color:

White, Yellow, Orange, Brown.

Density:

2.12

Diaphaneity:

Transparent to Translucent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Hardness:

1.5 - Between Talc and Gypsum

Luster:

Earthy (Dull)

Streak:

white

Optical Properties of Basaluminite

Gladstone-Dale:

CI meas= 0.038 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.081 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2329,KPDmeas= 0.2439,KC= 0.2534
Ncalc = 1.54 - 1.56

Optical Data:

Uniaxial (+), w=1.515-1.519, e=1.515-1.519, bire=0.0000.

Calculated Properties of Basaluminite

Electron Density:

Bulk Density (Electron Density)=2.19 gm/cc
note: Specific Gravity of Basaluminite =2.12 gm/cc.

Fermion Index:

Fermion Index = 0.0008390436
Boson Index = 0.9991609564

Photoelectric:

PE_Basaluminite= 1.20 barns/electron
U=PE_Basaluminite x rElectron Density= 2.62 barns/cc.

Radioactivity:

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

Basaluminite Classification

Dana Class:

31.04.05.01 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.04)where (A+ B++)4 (XO4) Zqï¿½x(H2O)

(31.04.05)Dana Group

31.04.05.01 Basaluminite? Al4(SO4)(OH)10•5(H2O) P 2₁ 2

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 Basaluminite 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 Basaluminite :
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

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

Basaluminite

Al4(SO4)(OH)10•5(H2O)
Dana No: 31.04.05.01 Strunz No: 07.DD.05
Locality:

Notes:

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