General Nickelalumite Information
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Chemical Formula: |
(Ni,Cu)Al4[(SO4),(NO3)2](OH)12·3(H2O) |
Composition: |
Molecular Weight = 632.31 gm |
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Aluminum 17.07 % Al 32.25 % Al2O3 |
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Copper 3.01 % Cu 3.77 % CuO |
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Nickel 6.50 % Ni 8.27 % NiO |
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Hydrogen 2.87 % H 25.64 % H2O |
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Sulfur 7.61 % S 18.99 % SO3 |
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Nitrogen 2.22 % N 8.54 % N2O5 |
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Oxygen 60.73 % O |
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______ ______ |
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100.00 % 97.47 % = TOTAL OXIDE |
Empirical Formula: |
Ni0.7Cu0.3Al4(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
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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 |
X Ray Diffraction: |
By Intensity(I/Io): 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
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Physical Properties of Nickelalumite
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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 |
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Optical Properties of Nickelalumite
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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 |
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Calculated Properties of Nickelalumite
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Electron Density: |
relectron=2.28 gm/cc note: rNickelalumite =2.24 gm/cc. |
Fermion Index |
Fermion Index = 0.02367 Boson Index = 0.97633 |
Photoelectric: |
PENickelalumite = 4.81 barns/electron U=PENickelalumite x relectron= 10.94 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Nickelalumite is Not Radioactive |
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Nickelalumite Classification
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Dana Class: |
31.3.1.2 (31)Hydrated Sulfates Containing Hydroxyl or Halogen |
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(31.3)where (A+ B++)5 (XO4) Zq·x(H2O) |
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(31.3.1)Dana Group |
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31.3.1.1 Chalcoalumite CuAl4(SO4)(OH)12·3(H2O) P 21 2 |
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31.3.1.2 Nickelalumite (Ni,Cu)Al4[(SO4),(NO3)2](OH)12·3(H2O) P 21 2 |
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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 |
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VI/D - Water-bearing sulfates with unfamiliar anions. cations of medium size |
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VI/D.08 - Spangolite - Glaucocerinite series |
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VI/D.08-05 Bechererite! (Zn,Cu)6Zn2(OH)13[(S,Si)(O,OH)4]2 P 3 3 |
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VI/D.08-10 Spangolite Cu6Al(SO4)(OH)12Cl·3(H2O) P 31c 3m |
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VI/D.08-20 Cyanotrichite Cu4Al2(SO4)(OH)12·2(H2O) Unk Ortho |
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VI/D.08-30 Carbonate-cyanotrichite Cu4Al2(CO3,SO4)(OH)12·2(H2O) Unk Ortho |
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VI/D.08-35 Camerolaite Cu4Al2[HSbO4,SO4](OH)10(CO3)·2(H2O) P 21 ? 2 |
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VI/D.08-40 Woodwardite Cu4Al2(SO4)(OH)12·2-4(H2O) Unk Hex |
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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 |
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VI/D.08-45 Zincowoodwardite! [Zn1-xAlx(OH)2][(SO4)x/2(H2O)n] P 3- or R 3m 3 |
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VI/D.08-45* Zincowoodwardite-1T! [Zn1BxAlx(OH)2][(SO4)x/2·n(H2O)],x=0.33,n.0.96 P 3 3 |
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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 |
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VI/D.08-50 Chalcoalumite CuAl4(SO4)(OH)12·3(H2O) P 21 2 |
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VI/D.08-60 Nickelalumite (Ni,Cu)Al4[(SO4),(NO3)2](OH)12·3(H2O) P 21 2 |
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VI/D.08-70 Mbobomkulite (Ni,Cu)Al4(NO3,SO4)2(OH)12·3(H2O) P 21 2 |
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VI/D.08-80 Hydrombobomkulite (Ni,Cu)Al4(NO3,SO4)2(OH)12·14(H2O) Unk Mono |
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VI/D.08-90 Carrboydite (Ni,Cu)14Al9(SO4,CO3)6(OH)43·7(H2O) Unk Hex |
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VI/D.08-100 Zincaluminite Zn6Al6(SO4)2(OH)26·5(H2O) Unk Hex |
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VI/D.08-110 Glaucocerinite (Zn,Cu)5Al3(SO4)1.5(OH)16·9(H2O) Unk (HEX-R) Trig |
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Other Nickelalumite Information
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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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Print or Cut-and-Paste your Nickelalumite Specimen Label here :
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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:
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