Ceruleite Mineral Data

General Ceruleite Information

Chemical Formula:

Cu2Al7(AsO4)4(OH)13•12(H2O)

Composition:

Molecular Weight = 1,308.92 gm

Aluminum 14.43 % Al 27.26 % Al₂O₃

Copper 9.71 % Cu 12.15 % CuO

Arsenic 22.90 % As 35.12 % As₂O₅

Hydrogen 2.85 % H 25.46 % H₂O

Oxygen 50.12 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cu₂Al₇(AsO₄)₄(OH)₁₃•12(H₂O)

Environment:

In the oxidized zone of arsenic-rich polymetallic mineral deposits; a post-mine product.

IMA Status:

Valid Species (Pre-IMA) 1900

Locality:

Emma Louisa gold mine, Guanaco district, about 100 km east-northeast of Taltal, Antofagasta, Chile. Link to MinDat.org Location Data.

Name Origin:

Named from cerulean, for the sky-blue color of the mineral.

Name Pronunciation:

Ceruleite + Pronunciation

Ceruleite Image

Images:

Ceruleite

Comments: Blue globular clusters of ceruleite.
Location: Wheal Gorland, Gwennap, Cornwall, England. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Ceruleite Crystallography

Axial Ratios:

a:b:c =0.9776:1:0.5065

Cell Dimensions:

a = 14.359, b = 14.687, c = 7.44, Z = 2; alpha = 96.06°, beta = 93.19°, gamma = 91.63° V = 1,557.21 Den(Calc)= 2.79

Crystal System:

Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 5.65(1), 7.296(0.75), 5.926(0.7),

Physical Properties of Ceruleite

Color:

Blue, Deep blue.

Density:

2.7

Hardness:

5-6 - Between Apatite and Orthoclase

Streak:

bluish white

Optical Properties of Ceruleite

Gladstone-Dale:

CI meas= -0.008 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.025 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2151,KPDmeas= 0.2222,KC= 0.2206
Ncalc = 1.6 - 1.62

Optical Data:

Biaxial (?), b=1.6

Calculated Properties of Ceruleite

Electron Density:

Bulk Density (Electron Density)=2.67 gm/cc
note: Specific Gravity of Ceruleite =2.70 gm/cc.

Fermion Index:

Fermion Index = 0.0002448298
Boson Index = 0.9997551702

Photoelectric:

PE_Ceruleite= 19.68 barns/electron
U=PE_Ceruleite x rElectron Density= 52.44 barns/cc.

Radioactivity:

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

Ceruleite Classification

Dana Class:

42.13.06.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.13)Dana Type

(42.13.06)Dana Group

42.13.06.01 Ceruleite Cu2Al7(AsO4)4(OH)13•12(H2O) P1 1

Strunz Class:

08.DE.25 08 - PHOSPHATES, ARSENATES, VANADATES

08.D - Phosphates, etc

08.DE -With only medium-sized cations, (OH, etc.):RO4 = 3:1

08.DE.25 Ceruleite Cu2Al7(AsO4)4(OH)13•12(H2O) P1 1

Other Ceruleite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Ceruleite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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

Ceruleite

Cu2Al7(AsO4)4(OH)13•12(H2O)
Dana No: 42.13.06.01 Strunz No: 08.DE.25
Locality:

Notes:

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