Aubertite Mineral Data

Aubertite Mineral Data +

General Aubertite Information

Chemical Formula:

CuAl(SO4)2Cl·14(H2O)

Composition:

Molecular Weight = 570.32 gm

Aluminum 4.73 % Al 8.94 % Al₂O₃

Copper 11.14 % Cu 13.95 % CuO

Hydrogen 4.95 % H 44.22 % H₂O

Sulfur 11.24 % S 28.08 % SO₃

Chlorine 6.22 % Cl 6.22 % Cl

- % Cl -1.40 % -O=Cl₂

Oxygen 61.72 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CuAl(SO₄)₂Cl·14(H₂O)

IMA Status:

Approved IMA 1978

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 8225

PDF 33-477

Aubertite Image

Images:

Aubertite

Comments: Aqua to white massive aubertite.
Location: Chuquicamata, Antofagasta, Chile. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Aubertite Crystallography

Axial Ratios:

a:b:c =0.4749:1:0.4746

Cell Dimensions:

a = 6.288, b = 13.239, c = 6.284, Z = 1; alpha = 91.866°, beta = 94.666°, gamma = 82.45° V = 516.60 Den(Calc)= 1.83

Crystal System:

Triclinic - PedialH-M Symbol (1) Space Group: P1

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

By Intensity(I/I_o): 4.5(1), 4.247(0.69), 3.952(0.58),

Crystal Structure:

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Ginderow D , Cesbron F , Acta Crystallographica, Section B , 35 (1979) p.2499-2502, Structure cristalline de l aubertite, AlCuCl(SO4)2*14H2O, Note: anisotropic displacement parameters obtained from ICSD

Physical Properties of Aubertite

Cleavage:

[010] Perfect

Color:

Azure, Blue.

Density:

1.815

Diaphaniety:

Transparent

Hardness:

2-3 - Gypsum-Calcite

Luster:

Vitreous (Glassy)

Streak:

light blue

Optical Properties of Aubertite

Gladstone-Dale:

CI meas= -0.009 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2621,KPDmeas= 0.2643,KC= 0.2619

Optical Data:

Biaxial (-), a=1.462, b=1.482, g=1.495, bire=0.0330, 2V(Calc)=76, 2V(Meas)=71.

Calculated Properties of Aubertite

Electron Density:

r_electron=1.89 gm/cc
note: r_Aubertite=1.83 gm/cc.

Fermion Index

Fermion Index = 0.00114
Boson Index = 0.99886

Photoelectric:

PE_Aubertite= 5.87 barns/electron
U=PE_Aubertite x r_electron= 11.12 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Aubertite is Not Radioactive

Aubertite Classification

Dana Class:

31.9.8.1 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.9)where (A+ B++) (XO4) Zq·x(H2O)

(31.9.8)Dana Group

31.9.8.1 Aubertite CuAl(SO4)2Cl·14(H2O) P1 1

31.9.8.2 Svyazhinite MgAl(SO4)2F·14(H2O) P1,P 1 Tri

31.9.8.3 Magnesioaubertite (Mg,Cu)Al(SO4)2Cl·14(H2O) P1 1

Strunz Class:

VI/D.07-40 VI - Sulfates,Chromates,Molybdates and Tungstates

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

VI/D.07 - Wilcoxite - Aubertite series

VI/D.07-10 Wilcoxite MgAl(SO4)2F·18(H2O) P 1,P1 Tri

VI/D.07-20 Svyazhinite MgAl(SO4)2F·14(H2O) P1,P 1 Tri

VI/D.07-30 Magnesioaubertite (Mg,Cu)Al(SO4)2Cl·14(H2O) P1 1

VI/D.07-40 Aubertite CuAl(SO4)2Cl·14(H2O) P1 1

Other Aubertite 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 Aubertite :
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 Aubertite Specimen Label here :

Aubertite

CuAl(SO4)2Cl·14(H2O)
Dana No: 31.9.8.1 Strunz No: VI/D.07-40
Locality:

Notes: