Chalcoalumite Mineral Data

Chalcoalumite Mineral Data +

General Chalcoalumite Information

Chemical Formula:

CuAl4(SO4)(OH)12·3(H2O)

Composition:

Molecular Weight = 525.67 gm

Aluminum 20.53 % Al 38.79 % Al₂O₃

Copper 12.09 % Cu 13.61 % Cu₂O

Hydrogen 3.45 % H 30.84 % H₂O

Sulfur 6.10 % S 15.23 % SO₃

Oxygen 57.83 % O

______ ______

100.00 % 98.48 % = TOTAL OXIDE

Empirical Formula:

CuAl₄(SO₄)(OH)₁₂·3(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1925

Locality:

Link to MinDat.org Location Data.

Chalcoalumite Image

Images:

Chalcoalumite

Comments: Pale bluish stellate twins of chalcoalumite on matrix.
Location: Lavender Pit, Bisbee, Cohchise County, Arizona, USA. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Chalcoalumite Crystallography

Axial Ratios:

a:b:c =1.9169:1:1.1464

Cell Dimensions:

a = 17.09, b = 8.915, c = 10.221, Z = 4; beta = 95.883° V = 1,549.04 Den(Calc)= 2.25

Crystal System:

Monoclinic - SphenoidalH-M Symbol (2) Space Group: P 2₁

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

By Intensity(I/I_o): 8.5(1), 4.25(0.91), 4.18(0.23),

Physical Properties of Chalcoalumite

Cleavage:

[100] Perfect

Color:

Blue, Blue gray, Greenish blue, Light blue green.

Density:

2.29

Diaphaniety:

Transparent to Translucent

Fracture:

Flexible - Flexible fragments.

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Habit:

Fibrous - Crystals made up of fibers.

Hardness:

2.5 - Finger Nail

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Dull

Streak:

bluish white

Optical Properties of Chalcoalumite

Gladstone-Dale:

CI meas= 0.063 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.047 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2326,KPDmeas= 0.2285,KC= 0.244

Optical Data:

Biaxial (+), a=1.52, b=1.52, g=1.53, bire=0.0100, 2V(Calc)=0, 2V(Meas)=0-15. Dispersion relatively strong.

Calculated Properties of Chalcoalumite

Electron Density:

r_electron=2.29 gm/cc
note: r_{Chalcoalumite}=2.25 gm/cc.

Fermion Index

Fermion Index = 0.00074
Boson Index = 0.99926

Photoelectric:

PE_{Chalcoalumite}= 6.07 barns/electron
U=PE_{Chalcoalumite} x r_electron= 13.87 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Chalcoalumite is Not Radioactive

Chalcoalumite Classification

Dana Class:

31.3.1.1 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.3)where (A+ B++)5 (XO4) Zq·x(H2O)

(31.3.1)Dana Group

31.3.1.1 Chalcoalumite CuAl4(SO4)(OH)12·3(H2O) P 2₁ 2

31.3.1.2 Nickelalumite (Ni,Cu)Al4[(SO4),(NO3)2](OH)12·3(H2O) P 2₁ 2

31.3.1.3 Kirgizstanite! ZnAl4(SO4)(OH)12·3(H2O) P 2₁/n 2/m

Strunz Class:

VI/D.08-50 VI - Sulfates,Chromates,Molybdates and Tungstates

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

VI/D.08 - Spangolite - Glaucocerinite series

VI/D.08-05 Bechererite! (Zn,Cu)6Zn2(OH)13[(S,Si)(O,OH)4]2 P 3 3

VI/D.08-10 Spangolite Cu6Al(SO4)(OH)12Cl·3(H2O) P 3₁c 3m

VI/D.08-20 Cyanotrichite Cu4Al2(SO4)(OH)12·2(H2O) Unk Ortho

VI/D.08-30 Carbonate-cyanotrichite Cu4Al2(CO3,SO4)(OH)12·2(H2O) Unk Ortho

VI/D.08-35 Camerolaite Cu4Al2[HSbO4,SO4](OH)10(CO3)·2(H2O) P 2₁ ? 2

VI/D.08-40 Woodwardite Cu4Al2(SO4)(OH)12·2-4(H2O) Unk Hex

VI/D.08-42 Hydrowoodwardite! Cu1-xAlx(OH)2(SO4)x/2·n(H2O)with0<x<0.67andn>3x/2 R 3m 3 2/m

VI/D.08-45 Zincowoodwardite! [Zn1-xAlx(OH)2][(SO4)x/2(H2O)n] P 3- or R 3m 3

VI/D.08-45* Zincowoodwardite-1T! [Zn1BxAlx(OH)2][(SO4)x/2·n(H2O)],x=0.33,n.0.96 P 3 3

VI/D.08-45** Zincowoodwardite-3R! [Zn1BxAlx(OH)2][(SO4)x/2·n(H2O)],0.32<x<0.50,n=0.59 R 3m 3 2/m

VI/D.08-50 Chalcoalumite CuAl4(SO4)(OH)12·3(H2O) P 2₁ 2

VI/D.08-60 Nickelalumite (Ni,Cu)Al4[(SO4),(NO3)2](OH)12·3(H2O) P 2₁ 2

VI/D.08-70 Mbobomkulite (Ni,Cu)Al4(NO3,SO4)2(OH)12·3(H2O) P 2₁ 2

VI/D.08-80 Hydrombobomkulite (Ni,Cu)Al4(NO3,SO4)2(OH)12·14(H2O) Unk Mono

VI/D.08-90 Carrboydite (Ni,Cu)14Al9(SO4,CO3)6(OH)43·7(H2O) Unk Hex

VI/D.08-100 Zincaluminite Zn6Al6(SO4)2(OH)26·5(H2O) Unk Hex

VI/D.08-110 Glaucocerinite (Zn,Cu)5Al3(SO4)1.5(OH)16·9(H2O) Unk (HEX-R) Trig

Other Chalcoalumite Information

References:

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

See Also:

Links to other databases for Chalcoalumite :
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 - YupRocks 14 -École des Mines de Paris

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Chalcoalumite

CuAl4(SO4)(OH)12·3(H2O)
Dana No: 31.3.1.1 Strunz No: VI/D.08-50
Locality:

Notes: