Heterogenite-3R Mineral Data

Heterogenite-3R Mineral Data +

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General Heterogenite-3R 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:

Secondary mineral of smaltite.

IMA Status:

Valid Species (Pre-IMA) 1872

Locality:

Schneeberg, Saxony and Wittichen, Baden, Germany. Link to MinDat.org Location Data.

Name Origin:

From the Greek for "of another kind", as differing in composition from similar minerals. 3R polytype.

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Heterogenite-3R Crystallography

Axial Ratios:

a:c = 1:4.60863

Cell Dimensions:

a = 2.849, c = 13.13, Z = 3; V = 92.30 Den(Calc)= 4.96

Crystal System:

Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m

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

By Intensity(I/I_o): 4.4(1), 2.315(0.8), 1.804(0.6),

Crystal Structure:

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Delaplane R G , Ibers J A , Ferraro J R , Rush J J , Journal of Chemical Physics , 50 (1969) p.1920-1927, Diffraction and spectroscopic studies of the cobaltic acid system HCoO2 - DCoO2, Note: X-ray study

View Additional jPOWD Structure files for Heterogenite-3R
[1]

Physical Properties of Heterogenite-3R

Color:

Black, Steel gray.

Density:

4.13 - 4.47, Average = 4.3

Diaphaniety:

Opaque

Fracture:

Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.

Habit:

Amorphous - No crystalline form or imitative shape.

Habit:

Globular - Spherical, or nearly so, rounded forms (e.g. wavellite).

Habit:

Reniform - "Kidney like" in shape (e.g.. hematite).

Hardness:

4-5 - Fluorite-Apatite

Luster:

Metallic - Dull

Streak:

brown black

Optical Properties of Heterogenite-3R

Optical Data:

NCalc= 2.64 - 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-3R 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-3R in Air**
Relative Intensity	0%	60%	100%	120%	180%	240%	300%	360%	420%	480%	540%
R₁
R₂

Calculated Properties of Heterogenite-3R

Electron Density:

r_electron=4.75 gm/cc
note: r_{Heterogenite-3R}=4.96 gm/cc.

Fermion Index

Fermion Index = 0.00016
Boson Index = 0.99984

Photoelectric:

PE_{Heterogenite-3R}= 21.98 barns/electron
U=PE_{Heterogenite-3R} x r_electron= 104.34 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Heterogenite-3R is Not Radioactive

Heterogenite-3R Classification

Dana Class:

6.1.4.2 (6)Hydroxides and Oxides Containing Hydroxyl

(6.1)where X+++O OH

(6.1.4)Dana Group

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

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

6.1.4.3 Feitknechtite beta-MnO(OH) Unk Hex

6.1.4.4 Feroxyhyte FeO(OH) Unk Hex

Strunz Class:

IV/F.07-40 IV - Oxides

IV/F - Hydroxides and oxidic hydrates, water-bearing oxides with layered structure

IV/F.07 - Lithiophorite - Grimaldiite series

IV/F.07-10 Lithiophorite (Al,Li)MnO2(OH)2 R 3m 3 2/m

IV/F.07-20 Asbolane (Co,Ni)1-y(MnO2)2-x(OH)2-2y2x·n(H2O) Unk Hex

IV/F.07-30 Heterogenite-2H CoO(OH) P 6₃/mmc 6/m 2/m 2/m

IV/F.07-40 Heterogenite-3R CoO(OH) R 3m 3 2/m

IV/F.07-50 Bracewellite CrO(OH) Pbnm 2/m 2/m 2/m

IV/F.07-60 Guyanaite CrO(OH) Pnnm 2/m 2/m 2/m

IV/F.07-70 Grimaldiite CrO(OH) R 3m 3 2/m

Other Heterogenite-3R Information

References:

NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)

See Also:

Links to other databases for Heterogenite-3R :
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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Heterogenite-3R

Co+++O(OH)
Dana No: 6.1.4.2 Strunz No: IV/F.07-40
Locality:

Notes: