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Nickelalumite Mineral Data

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General Nickelalumite Information

Help on Chemical  Formula: Chemical Formula: (Ni,Cu)Al4[(SO4),(NO3)2](OH)12•3(H2O)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Ni0.7Cu0.3Al4(SO4)1.5(NO3)(OH)12•3(H2O)
Help on Environment: Environment: Crusts on gypsum crystals.
Help on IMA Status: IMA Status: Not Approved IMA 1980
Help on Locality: Locality: Mbobo Mkulu cave, eastern Transvaal, South Africa. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named in allusion to its composition.
Help on Name Pronunciation: Name Pronunciation: Nickelalumite + Pronunciation Say NICKELALUMITE

Nickelalumite Image

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Comments: Aggregates of blue neckelaluminite spherulites on matrix.
Location: Jomde mine, San Juan County, Utah, USA. Scale: See Image.
© Rruff Database

Nickelalumite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.1484:1:1.9383
Help on Cell Dimensions: Cell Dimensions: a = 10.175, b = 8.86, c = 17.174, Z = 4; beta = 95.95° V = 1,539.90 Den(Calc)= 2.73
Help on Crystal System: Crystal System: Monoclinic - Sphenoidal H-M Symbol (2) Space Group: P 21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.543(1), 1.997(0.2), 7.877(0.2),

Physical Properties of Nickelalumite

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Sky blue.
Help on Density: Density: 2.24
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Nodular - Tuberose forms having irregular protuberances over the surface.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Streak: Streak: bluish white

Optical Properties of Nickelalumite

Help on Gladstone-Dale: 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
Ncalc = 1.51 - 1.63
Help on Optical Data: Optical Data: Biaxial (?), a=1.532, g=1.543, bire=0.0110

Calculated Properties of Nickelalumite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.28 gm/cc
note: Specific Gravity of Nickelalumite =2.24 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PENickelalumite = 4.81 barns/electron
U=PENickelalumite x rElectron Density= 10.94 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Nickelalumite is Not Radioactive

Nickelalumite Classification

Help on  Dana Class: Dana Class: (31)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.03)where (A+ B++)5 (XO4) Zq�x(H2O)
  (31.03.01)Dana Group Chalcoalumite CuAl4(SO4)(OH)12•3(H2O) P 21 2 Nickelalumite* (Ni,Cu)Al4[(SO4),(NO3)2](OH)12•3(H2O) P 21 2 Kyrgyzstanite! ZnAl4(SO4)(OH)12•3(H2O) P 21/n 2/m
Help on  Strunz Class: Strunz Class: 07.DD.75 07 - SULFATES (SELENATES, TELLURATES)
  07.D - Sulfates (selenates, etc.) with additional anions, with H2O
  07.DD -With only medium-sized cations; sheets of edge-sharing octahedra
07.DD.75 Chalcoalumite CuAl4(SO4)(OH)12•3(H2O) P 21 2
07.DD.75 Nickelalumite* (Ni,Cu)Al4[(SO4),(NO3)2](OH)12•3(H2O) P 21 2

Other Nickelalumite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Nickelalumite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 07.DD.75





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