Aubertite Mineral Data

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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)

Environment:

Oxidized zone of a copper deposit.

IMA Status:

Approved IMA 1978

Locality:

Quetena, west of Calama, Antofagasta, Chile. Link to MinDat.org Location Data.

Name Origin:

Named for J. Aubert (1929- ), French geophysicist who collected the first specimens.

Name Pronunciation:

Aubertite + Pronunciation

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

Diaphaneity:

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
Ncalc = 1.48

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:

Bulk Density (Electron Density)=1.89 gm/cc
note: Specific Gravity of Aubertite =1.83 gm/cc.

Fermion Index:

Fermion Index = 0.0011470323
Boson Index = 0.9988529677

Photoelectric:

PE_Aubertite= 5.87 barns/electron
U=PE_Aubertite x rElectron Density= 11.12 barns/cc.

Radioactivity:

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

Aubertite Classification

Dana Class:

31.09.08.01 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.09)where (A+ B++) (XO4) Zq·x(H2O)

(31.09.08)Aubertite Group

31.09.08.01 Aubertite CuAl(SO4)2Cl•14(H2O) P1 1

31.09.08.02 Svyazhinite MgAl(SO4)2F•14(H2O) P1,P 1 Tri

31.09.08.03 Magnesioaubertite (Mg,Cu)Al(SO4)2Cl•14(H2O) P1 1

Strunz Class:

07.DB.05 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.05 Aubertite CuAl(SO4)2Cl•14(H2O) P1 1

07.DB.05 Magnesioaubertite (Mg,Cu)Al(SO4)2Cl•14(H2O) P1 1

07.DB.05 Svyazhinite MgAl(SO4)2F•14(H2O) P1,P 1 Tri

Other Aubertite 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 Aubertite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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

Aubertite

CuAl(SO4)2Cl•14(H2O)
Dana No: 31.09.08.01 Strunz No: 07.DB.05
Locality:

Notes: