Heterogenite-2H Mineral Data

General Heterogenite-2H Information

Chemical Formula:

Co+++O(OH)

Composition:

Molecular Weight = 91.94 gm

Cobalt 64.10 % Co 90.20 % Co₂O₃

Hydrogen 1.10 % H 9.80 % H₂O

Oxygen 34.80 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CoO(OH)

Environment:

A weathering product of smaltite, an alteration product of linnaeite, and widespread in residual soils above ultramafic rocks.

IMA Status:

Approved IMA 1973

Locality:

Midigi, Shaba, Congo (Zaire). Schneeberg, Sachsen (Saxony), Germany Link to MinDat.org Location Data.

Name Origin:

From the Greek for "of another kind", as differing in composition from similar minerals. 2H polytype.

Name Pronunciation:

Heterogenite-2H + Pronunciation

Heterogenite-2H Image

Images:

Heterogenite-2H

Comments: Shiny black botryoidal heterogenite-2H.
Location: Star of the Congo mine, Katanga, Congo. Scale: 6 cm.
© John Attard

Heterogenite-2H Crystallography

Axial Ratios:

a:c = 1:3.08406

Cell Dimensions:

a = 2.855, c = 8.805, Z = 2; V = 62.15 Den(Calc)= 4.91

Crystal System:

Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6₃/mmc

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

By Intensity(I/I_o): 4.39(1), 1.236(0.9), 2.158(0.8),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Deliens M , Goethals H , Mineralogical Magazine , 39 (1973) p.152-157, Polytypism of heterogenite, Locality: Mindigi, Shaba, Zaire

Physical Properties of Heterogenite-2H

Cleavage:

{0001} Good

Color:

Black, Steel gray.

Density:

4.3

Diaphaneity:

Opaque

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

3-4 - Calcite-Fluorite

Luster:

Metallic

Streak:

dark brown

Optical Properties of Heterogenite-2H

Optical Data:

NCalc= 2.62 - from Gladstone-Dale relationship (KC = 0.3301) where Ncalc=Dcalc*KC+1
NCalc= 2.42 - from Gladstone-Dale relationship (KC = 0.3301) where Ncalc=Dmeas*KC+1

RL Anisotrophism:

Strong, bluish to yellowish white, browns.

RL Bireflectance:

Very strong.

RL Color:

White with a brownish tinge.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Heterogenite-2H in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	15.00	30.40
420 nm	15.80	30.40
440 nm	16.60	30.40
460 nm	16.70	29.80
480 nm	16.60	28.80
500 nm	16.30	27.80
520 nm	16.20	27.00
540 nm	16.30	26.40
560 nm	16.60	26.00
580 nm	16.70	25.60
600 nm	16.70	25.30
620 nm	16.50	25.00
640 nm	16.40	24.80
660 nm	16.20	24.50
680 nm	16.00	24.20
700 nm	15.80	23.80

**Calculated Relative Intensity Colors of Heterogenite-2H in Air**
Relative Intensity	0%	60%	100%	120%	180%	240%	300%	360%	420%	480%	540%
R₁
R₂

Calculated Properties of Heterogenite-2H

Electron Density:

Bulk Density (Electron Density)=4.70 gm/cc
note: Specific Gravity of Heterogenite-2H =4.91 gm/cc.

Fermion Index:

Fermion Index = 0.0001687038
Boson Index = 0.9998312962

Photoelectric:

PE_{Heterogenite-2H}= 21.98 barns/electron
U=PE_{Heterogenite-2H} x rElectron Density= 103.28 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Heterogenite-2H is Not Radioactive

Heterogenite-2H Classification

Dana Class:

06.01.04.01 (06)Hydroxides and Oxides Containing Hydroxyl

(06.01)where X+++O OH

(06.01.04)Heterogenite Group

06.01.04.01 Heterogenite-2H CoO(OH) P 6₃/mmc 6/m 2/m 2/m

06.01.04.02 Heterogenite-3R CoO(OH) R 3m 3 2/m

06.01.04.03 Feitknechtite beta-MnO(OH) Unk Hex

06.01.04.04 Feroxyhyte FeO(OH) Unk Hex

Strunz Class:

04.FE.20 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.F - Hydroxides (without V or U)

04.FE -Hydroxides with OH, without H2O; sheets of edge-sharing octahedra

04.FE.20 Grimaldiite CrO(OH) R 3m 3 2/m

04.FE.20 Heterogenite-2H CoO(OH) P 6₃/mmc 6/m 2/m 2/m

04.FE.20 Heterogenite-3R CoO(OH) R 3m 3 2/m

Other Heterogenite-2H Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)

See Also:

Links to other databases for Heterogenite-2H :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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Ask about Heterogenite-2H here :
Ask-A-Mineralogist from the Mineralogical Society of America
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Print or Cut-and-Paste your Heterogenite-2H Specimen Label here :

Heterogenite-2H

Co+++O(OH)
Dana No: 06.01.04.01 Strunz No: 04.FE.20
Locality:

Notes: