Basaluminite Mineral Data

Basaluminite Mineral Data +

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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)

IMA Status:

Valid Species (Pre-IMA) 1948

Locality:

Link to MinDat.org Location Data.

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 - SphenoidalH-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

Diaphaniety:

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

Optical Data:

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

Calculated Properties of Basaluminite

Electron Density:

r_electron=2.19 gm/cc
note: r_Basaluminite=2.12 gm/cc.

Fermion Index

Fermion Index = 0.00083
Boson Index = 0.99917

Photoelectric:

PE_Basaluminite= 1.20 barns/electron
U=PE_Basaluminite x r_electron= 2.62 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Basaluminite is Not Radioactive

Basaluminite Classification

Dana Class:

31.4.5.1 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.4)where (A+ B++)4 (XO4) Zq·x(H2O)

(31.4.5)Dana Group

31.4.5.1 Basaluminite Al4(SO4)(OH)10·5(H2O) P 2₁ 2

Strunz Class:

VI/D.06-50 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 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 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris

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Basaluminite

Al4(SO4)(OH)10·5(H2O)
Dana No: 31.4.5.1 Strunz No: VI/D.06-50
Locality:

Notes: