Ceruleite Mineral Data

Ceruleite Mineral Data +

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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)

IMA Status:

Valid Species (Pre-IMA) 1900

Locality:

Link to MinDat.org Location Data.

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 - PinacoidalH-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

Optical Data:

Biaxial (?), b=1.6

Calculated Properties of Ceruleite

Electron Density:

r_electron=2.67 gm/cc
note: r_Ceruleite=2.70 gm/cc.

Fermion Index

Fermion Index = 0.00024
Boson Index = 0.99976

Photoelectric:

PE_Ceruleite= 19.68 barns/electron
U=PE_Ceruleite x r_electron= 52.44 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Ceruleite is Not Radioactive

Ceruleite Classification

Dana Class:

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

(42.13)Dana Type

(42.13.6)Dana Group

42.13.6.1 Ceruleite Cu2Al7(AsO4)4(OH)13·12(H2O) P1 1

Strunz Class:

VII/D.20-20 VII - Phosphates, Arsenates and Vanadates

VII/D - Water-bearing phosphates with unfamiliar anions, cations of medium size: Cu, Zn, Mn, Al, Fe

VII/D.20 - Zapatalite - Chalcophyllite series

VII/D.20-10 Zapatalite Cu3Al4(PO4)3(OH)9·4(H2O) Unk Tetra

VII/D.20-20 Ceruleite Cu2Al7(AsO4)4(OH)13·12(H2O) P1 1

VII/D.20-30 Parnauite Cu9(AsO4)2(SO4)(OH)10·7(H2O) P 2₁22 2 2 2

VII/D.20-35 Leogangite! Cu10(AsO4)4(SO4)(OH)6·8(H2O) C 2/c 2/m

VII/D.20-40 Liroconite Cu2Al(AsO4)(OH)4·4(H2O) I2/a 2/m

VII/D.20-50 Chalcophyllite Cu18Al2(AsO4)3(SO4)3(OH)27·33(H2O) R 3m 3 2/m

Other Ceruleite 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 Ceruleite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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

Ceruleite

Cu2Al7(AsO4)4(OH)13·12(H2O)
Dana No: 42.13.6.1 Strunz No: VII/D.20-20
Locality:

Notes: