Ernienickelite Mineral Data

General Ernienickelite Information

Chemical Formula:

NiMn++++3O7•3(H2O)

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

Empirical Formula:

NiMn⁴⁺₃O₇•3(H₂O)

Environment:

Cavities in chalcedony in a laterized dunite.

IMA Status:

Approved IMA 1994

Locality:

SM7 open pit N of Siberia, Kalgoorlie district, WA, Australia. Link to MinDat.org Location Data.

Name Origin:

Named for Ernest (Ernie) Henry Nickel (1925-), Canadian-Australian mineralogist, Commonwealth Scientific and Industrial Research Organization (CISRO) and International Mineralogical Association (IMA).

Name Pronunciation:

Ernienickelite + Pronunciation

Synonym:

IMA1993-002

Ernienickelite Image

Images:

Ernienickelite

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

Axial Ratios:

a:c = 1:2.7309

Cell Dimensions:

a = 7.514, c = 20.52, Z = 6; V = 1,003.35 Den(Calc)= 3.87

Crystal System:

Trigonal Space Group: R 3 or R 3

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

By Intensity(I/I_o): 6.84(1), 2.219(0.3), 4.01(0.2),

Physical Properties of Ernienickelite

Cleavage:

{0001} Perfect

Color:

Reddish black.

Density:

3.84

Diaphaneity:

Subtranslucent to Opaque

Fracture:

Brittle - Splintery - Brittle fracture leaving splintery fragments.

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Habit:

Platy - Sheet forms (e.g. micas).

Habit:

Rosette - Bundled tabular aggregates resembling rose flower petals.

Hardness:

2 - Gypsum

Luster:

Sub Metallic

Streak:

yellowish brown

Optical Properties of Ernienickelite

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

Optical Data:

Uniaxial (-), e=1.97, w=2, bire=0.0300.

Calculated Properties of Ernienickelite

Electron Density:

Bulk Density (Electron Density)=3.73 gm/cc
note: Specific Gravity of Ernienickelite =3.84 gm/cc.

Fermion Index:

Fermion Index = 0.0019019619
Boson Index = 0.9980980381

Photoelectric:

PE_{Ernienickelite}= 16.89 barns/electron
U=PE_{Ernienickelite} x rElectron Density= 62.92 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ernienickelite is Not Radioactive

Ernienickelite Classification

Dana Class:

07.08.02.04 (07)Multiple Oxides

(07.08)where A B (O)2ï¿½x(H2O)

(07.08.02)Chalcophanite Group

07.08.02.01 Chalcophanite (Zn,Fe,Mn)Mn3O7•3(H2O) R 3 3

07.08.02.02 Aurorite (Mn,Ag,Ca)Mn3O7•3(H2O) P1 1

07.08.02.03 Jianshuiite (Mg,Mn)Mn3O7•3(H2O) R 3 or R 3 Trig

07.08.02.04 Ernienickelite NiMn3O7•3(H2O) R 3 or R 3 Trig

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 ï¿½ (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

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

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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Ernienickelite

NiMn++++3O7•3(H2O)
Dana No: 07.08.02.04 Strunz No: 04.FL.20
Locality:

Notes:

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