Nickelalumite Mineral Data

Nickelalumite Mineral Data +

General Nickelalumite Information

Chemical Formula:

(Ni,Cu)Al4[(SO4),(NO3)2](OH)12·3(H2O)

Composition:

Molecular Weight = 632.31 gm

Aluminum 17.07 % Al 32.25 % Al₂O₃

Copper 3.01 % Cu 3.77 % CuO

Nickel 6.50 % Ni 8.27 % NiO

Hydrogen 2.87 % H 25.64 % H₂O

Sulfur 7.61 % S 18.99 % SO₃

Nitrogen 2.22 % N 8.54 % N₂O₅

Oxygen 60.73 % O

______ ______

100.00 % 97.47 % = TOTAL OXIDE

Empirical Formula:

Ni_0.7Cu_0.3Al₄(SO₄)_1.5(NO₃)(OH)₁₂·3(H₂O)

Environment:

Crusts on gypsum crystals.

IMA Status:

Approved IMA 1980

Locality:

Mbobo Mkulu cave, eastern Transvaal, South Africa. Link to MinDat.org Location Data.

Name Origin:

Named in allusion to its composition.

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Nickelalumite Crystallography

Axial Ratios:

a:b:c =1.1484:1:1.9383

Cell Dimensions:

a = 10.175, b = 8.86, c = 17.174, Z = 4; beta = 95.95° V = 1,539.90 Den(Calc)= 2.73

Crystal System:

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

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

By Intensity(I/I_o): 8.543(1), 1.997(0.2), 7.877(0.2),

Crystal Structure:

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Uvarova Y A , Sokolova E , Hawthorne F C , Karpenko V V , Agakhanov A A , Pautov L A , The Canadian Mineralogist , 43 (2005) p.1511-1519, The crystal chemistry of the nickelalumite -group minerals

Physical Properties of Nickelalumite

Cleavage:

[???] Perfect

Color:

Sky blue.

Density:

2.24

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Habit:

Nodular - Tuberose forms having irregular protuberances over the surface.

Hardness:

2.5 - Finger Nail

Streak:

bluish white

Optical Properties of Nickelalumite

Gladstone-Dale:

CI meas= -0.047 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.141 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1969,KPDmeas= 0.24,KC= 0.2292

Optical Data:

Biaxial (?), a=1.532, g=1.543, bire=0.0110

Calculated Properties of Nickelalumite

Electron Density:

r_electron=2.28 gm/cc
note: r_{Nickelalumite}=2.24 gm/cc.

Fermion Index

Fermion Index = 0.02367
Boson Index = 0.97633

Photoelectric:

PE_{Nickelalumite}= 4.81 barns/electron
U=PE_{Nickelalumite} x r_electron= 10.94 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Nickelalumite is Not Radioactive

Nickelalumite Classification

Dana Class:

31.3.1.2 (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.08-60 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 Nickelalumite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Nickelalumite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Nickelalumite

(Ni,Cu)Al4[(SO4),(NO3)2](OH)12·3(H2O)
Dana No: 31.3.1.2 Strunz No: VI/D.08-60
Locality:

Notes: