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Ernienickelite Mineral Data

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General Ernienickelite Information

Help on Chemical  Formula: Chemical Formula: NiMn++++3O7•3(H2O)
Help on Composition: Composition: Molecular Weight = 389.55 gm
   Manganese  42.31 %  Mn   66.95 % MnO2
   Nickel     15.07 %  Ni   19.17 % NiO
   Hydrogen    1.55 %  H    13.87 % H2O
   Oxygen     41.07 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NiMn4+3O7•3(H2O)
Help on Environment: Environment: Cavities in chalcedony in a laterized dunite.
Help on IMA Status: IMA Status: Approved IMA 1994
Help on Locality: Locality: SM7 open pit N of Siberia, Kalgoorlie district, WA, Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Ernest (Ernie) Henry Nickel (1925-), Canadian-Australian mineralogist, Commonwealth Scientific and Industrial Research Organization (CISRO) and International Mineralogical Association (IMA).
Help on Name Pronunciation: Name Pronunciation: Ernienickelite + Pronunciation Say ERNIENICKELITE
Help on Synonym: Synonym: IMA1993-002

Ernienickelite Image

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Comments: Very small reddish-black tabular crystals of ernienickelite on quartz.
Location: Siberia complex, Western Australia, Australia. Scale: Picture size 0.7 mm.
© Thomas Witzke / Abraxas-Verlag

Ernienickelite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.7309
Help on Cell Dimensions: Cell Dimensions: a = 7.514, c = 20.52, Z = 6; V = 1,003.35 Den(Calc)= 3.87
Help on Crystal System: Crystal System: Trigonal Space Group: R 3 or R 3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.84(1), 2.219(0.3), 4.01(0.2),

Physical Properties of Ernienickelite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Reddish black.
Help on Density: Density: 3.84
Help on Diaphaneity: Diaphaneity: Subtranslucent to Opaque
Help on Fracture: Fracture: Brittle - Splintery - Brittle fracture leaving splintery fragments.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Rosette - Bundled tabular aggregates resembling rose flower petals.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: yellowish brown

Optical Properties of Ernienickelite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.256 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.262 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2545,KPDmeas= 0.2565,KC= 0.3447
Ncalc = 2.32 - 2.33
Help on Optical Data: Optical Data: Uniaxial (-), e=1.97, w=2, bire=0.0300.

Calculated Properties of Ernienickelite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.73 gm/cc
note: Specific Gravity of Ernienickelite =3.84 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0019019619
Boson Index = 0.9980980381
Help on Photoelectric: Photoelectric: PEErnienickelite = 16.89 barns/electron
U=PEErnienickelite x rElectron Density= 62.92 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ernienickelite is Not Radioactive

Ernienickelite Classification

Help on  Dana Class: Dana Class: (07)Multiple Oxides
  (07.08)where A B (O)2�x(H2O)
  (07.08.02)Chalcophanite Group Chalcophanite (Zn,Fe,Mn)Mn3O7•3(H2O) R 3 3 Aurorite (Mn,Ag,Ca)Mn3O7•3(H2O) P1 1 Jianshuiite (Mg,Mn)Mn3O7•3(H2O) R 3 or R 3 Trig Ernienickelite NiMn3O7•3(H2O) R 3 or R 3 Trig
Help on  Strunz Class: Strunz Class: 04.FL.20 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.F - Hydroxides (without V or U)
  04.FL -Hydroxides with H2O � (OH); sheets of edge-sharing octahedra
04.FL.20 Aurorite (Mn,Ag,Ca)Mn3O7•3(H2O) P1 1
04.FL.20 Chalcophanite (Zn,Fe,Mn)Mn3O7•3(H2O) R 3 3
04.FL.20 Ernienickelite NiMn3O7•3(H2O) R 3 or R 3 Trig
04.FL.20 Jianshuiite (Mg,Mn)Mn3O7•3(H2O) R 3 or R 3 Trig

Other Ernienickelite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Ernienickelite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Dana No: Strunz No: 04.FL.20





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