General Heterogenite-2H Information
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Chemical Formula: |
Co+++O(OH) |
Composition: |
Molecular Weight = 91.94 gm |
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Cobalt 64.10 % Co 90.20 % Co2O3 |
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Hydrogen 1.10 % H 9.80 % H2O |
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Oxygen 34.80 % O |
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______ ______ |
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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. |
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Heterogenite-2H Image |
Images:
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Heterogenite-2H
Comments: Shiny black botryoidal heterogenite-2H.
Location: Star of the Congo mine, Katanga, Congo.
Scale: 6 cm.
© John Attard |
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Heterogenite-2H Crystallography
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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 |
X Ray Diffraction: |
By Intensity(I/Io): 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
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Deliens M , Goethals H , Mineralogical Magazine , 39 (1973) p.152-157, Polytypism of heterogenite, Locality: Mindigi, Shaba, Zaire
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Physical Properties of Heterogenite-2H
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Cleavage: |
[0001] Good |
Color: |
Black, Steel gray. |
Density: |
4.3 |
Diaphaniety: |
Opaque |
Habit: |
Massive - Uniformly indistinguishable crystals forming large masses. |
Hardness: |
3-4 - Calcite-Fluorite |
Luster: |
Metallic |
Streak: |
dark brown |
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Optical Properties of Heterogenite-2H
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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 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
15.00 |
30.40 |

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| 420 nm |
15.80 |
30.40 |

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| 440 nm |
16.60 |
30.40 |

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| 460 nm |
16.70 |
29.80 |

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| 480 nm |
16.60 |
28.80 |

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| 500 nm |
16.30 |
27.80 |

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| 520 nm |
16.20 |
27.00 |

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| 540 nm |
16.30 |
26.40 |

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| 560 nm |
16.60 |
26.00 |

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| 580 nm |
16.70 |
25.60 |

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| 600 nm |
16.70 |
25.30 |

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| 620 nm |
16.50 |
25.00 |

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| 640 nm |
16.40 |
24.80 |

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| 660 nm |
16.20 |
24.50 |

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| 680 nm |
16.00 |
24.20 |

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| 700 nm |
15.80 |
23.80 |

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Calculated Relative Intensity Colors of Heterogenite-2H in Air
Relative Intensity |
0% |
60% |
100% |
120% |
180% |
240% |
300% |
360% |
420% |
480% |
540% |
| R1 |
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| R2 |
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Calculated Properties of Heterogenite-2H
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Electron Density: |
relectron=4.70 gm/cc note: rHeterogenite-2H =4.91 gm/cc. |
Fermion Index |
Fermion Index = 0.00016 Boson Index = 0.99984 |
Photoelectric: |
PEHeterogenite-2H = 21.98 barns/electron U=PEHeterogenite-2H x relectron= 103.28 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Heterogenite-2H is Not Radioactive |
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Heterogenite-2H Classification
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Dana Class: |
6.1.4.1 (6)Hydroxides and Oxides Containing Hydroxyl |
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(6.1)where X+++O OH |
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(6.1.4)Dana Group |
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6.1.4.1 Heterogenite-2H CoO(OH) P 63/mmc 6/m 2/m 2/m |
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6.1.4.2 Heterogenite-3R CoO(OH) R 3m 3 2/m |
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6.1.4.3 Feitknechtite beta-MnO(OH) Unk Hex |
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6.1.4.4 Feroxyhyte FeO(OH) Unk Hex |
Strunz Class: |
IV/F.07-30 IV - Oxides |
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IV/F - Hydroxides and oxidic hydrates, water-bearing oxides with layered structure |
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IV/F.07 - Lithiophorite - Grimaldiite series |
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IV/F.07-10 Lithiophorite (Al,Li)MnO2(OH)2 R 3m 3 2/m |
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IV/F.07-20 Asbolane (Co,Ni)1-y(MnO2)2-x(OH)2-2y2x·n(H2O) Unk Hex |
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IV/F.07-30 Heterogenite-2H CoO(OH) P 63/mmc 6/m 2/m 2/m |
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IV/F.07-40 Heterogenite-3R CoO(OH) R 3m 3 2/m |
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IV/F.07-50 Bracewellite CrO(OH) Pbnm 2/m 2/m 2/m |
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IV/F.07-60 Guyanaite CrO(OH) Pnnm 2/m 2/m 2/m |
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IV/F.07-70 Grimaldiite CrO(OH) R 3m 3 2/m |
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Other Heterogenite-2H Information
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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 -Google Images
5 -Google Scholar
6 -MinDAT
7 -MinMax(Deutsch)
8 -MinMax(English)
9 -Mineralienatlas (Deutsch)
10 -QUT Mineral Atlas
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Print or Cut-and-Paste your Heterogenite-2H Specimen Label here :
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Heterogenite-2H
Co+++O(OH)
Dana No: 6.1.4.1 Strunz No: IV/F.07-30
Locality:
Notes:
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