Hausmannite Mineral Data

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General Hausmannite Information

Chemical Formula:

Mn++Mn+++2O4

Composition:

Molecular Weight = 228.81 gm

Manganese 72.03 % Mn 103.50 % Mn₂O₃

Oxygen 27.97 % O

______ ______

100.00 % 103.50 % = TOTAL OXIDE

Empirical Formula:

Mn³⁺₃O₄

Environment:

A primary mineral in hydrothermal veins. Also produced by metamorphism of manganiferous rocks.

IMA Status:

Valid Species (Pre-IMA) 1827

Locality:

Ilmenau and nearby at Orenstock, in Thuringia, Germany. Link to MinDat.org Location Data.

Name Origin:

Named after the German mineralogist, J. F. L. Hausmann (1782-1859).

Name Pronunciation:

Hausmannite + Pronunciation

Synonym:

Arseniodialyte

ICSD 68174

PDF 24-734

Hausmannite Image

Images:

Hausmannite Ephesite

Comments: Flesh-colored ephesite associated with dark brownish black hausmannite.
Location: Gloucester mine. Postmasburg, Cape province. S. Africa. Scale: 5.5 x 5 cm.
© Fabre Minerals

Images:

Hausmannite

Comments: Black hausmannite crystals with minor brucite.
Location: Wessels Mine, Kalahari, South Africa. Scale: 6.5 x 6 cm.
© John Veevaert

Images:

Hausmannite Kombatite

Comments: Yellow kombatite crystals in black hausmannite.
Location: Kombat Mine, Otavi, Namibia. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Images:

Hausmannite Fredrikssonite

Comments: Red-brown elongated crystalline fredrikssonite in calcite with granular hausmannite.
Location: Langban, Varmland, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Hausmannite Filipstadite

Comments: Dark minute grains of filipstadtite in hausmannite (slabbed specimen).
Location: Jacobsberg Mine, near Nordmark, Filipstad, Varmland, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Hausmannite Crystallography

Axial Ratios:

a:c = 1:1.63888

Cell Dimensions:

a = 5.76, c = 9.44, Z = 4; V = 313.20 Den(Calc)= 4.85

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: I 4₁/amd

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

By Intensity(I/I_o): 2.49(1), 2.77(0.9), 1.544(0.8),

Forms:

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Forms: ( 1 0 0) ( 0 1 1) ( 0 0 1)

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Crystal Structure:

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Baron V , Gutzmer J , Rundlof H , Tellgren R , American Mineralogist , 83 (1998) p.786-793, The influence of iron substitution on the magnetic properties of hausmannite,, Mn(Fe,Mn)2O4, Sample at T = 295 K, natural

View Additional jPOWD Structure files for Hausmannite
[1] [2]

Physical Properties of Hausmannite

Cleavage:

{001} Perfect

Color:

Brownish black, Grayish.

Density:

4.7 - 4.84, Average = 4.76

Diaphaneity:

Opaque

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Habit:

Pseudo Octohedral - Crystals show an octohedral outline.

Hardness:

5.5 - Knife Blade

Luminescence:

Non-fluorescent.

Luster:

Sub Metallic

Magnetism:

Nonmagnetic

Streak:

dark reddish brown

Optical Properties of Hausmannite

Dichroism (e):

dark gray.

Dichroism (w):

light gray.

Gladstone-Dale:

CI meas= 0.122 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.136 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2691,KPDmeas= 0.2736,KC= 0.3115
Ncalc = 2.46 - 2.51

Optical Data:

Uniaxial (-), e=2.15, w=2.46, bire=0.3100.

RL Anisotrophism:

Distinct.

RL Bireflectance:

Weak.

RL Color:

Gray, with deep blood red to reddish brown internal reflections.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Hausmannite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	21.50	18.80
420 nm	21.20	18.40
440 nm	20.90	17.90
460 nm	20.70	17.50
480 nm	20.50	17.20
500 nm	20.40	17.00
520 nm	20.40	16.70
540 nm	20.30	16.40
560 nm	20.10	16.10
580 nm	20.10	15.90
600 nm	20.00	15.70
620 nm	19.90	15.50
640 nm	19.90	15.40
660 nm	19.80	15.20
680 nm	19.80	15.10
700 nm	19.70	14.90

**Calculated Relative Intensity Colors of Hausmannite in Air**
Relative Intensity	0%	60%	100%	120%	180%	240%	300%	360%	420%	480%	540%	560%
R₁
R₂

Calculated Properties of Hausmannite

Electron Density:

Bulk Density (Electron Density)=4.46 gm/cc
note: Specific Gravity of Hausmannite =4.77 gm/cc.

Fermion Index:

Fermion Index = 0.0001342538
Boson Index = 0.9998657462

Photoelectric:

PE_Hausmannite= 19.02 barns/electron
U=PE_Hausmannite x rElectron Density= 84.86 barns/cc.

Radioactivity:

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

Hausmannite Classification

Dana Class:

07.02.07.01 (07)Multiple Oxides

(07.02)(A+ B++)2 X4 Spinel group

(07.02.07)Dana Group

07.02.07.01 Hausmannite MnMn2O4 I 4₁/amd 4/m 2/m 2/m

07.02.07.02 Hetaerolite ZnMn2O4 I 4₁/amd 4/m 2/m 2/m

07.02.07.03 Hydrohetaerolite Zn2Mn4O8•(H2O) I 4₁/amd 4/m 2/m 2/m

Strunz Class:

04.BB.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.B - Metal:Oxygen = 3:4 and similar

04.BB -With only medium-sized cations

04.BB.10 Hausmannite MnMn2O4 I 4₁/amd 4/m 2/m 2/m

04.BB.10 Iwakiite Mn(Fe,Mn)2O4 P 4₁/nnm 4/m 2/m 2/m

04.BB.10 Hydrohetaerolite Zn2Mn4O8•(H2O) I 4₁/amd 4/m 2/m 2/m

04.BB.10 Hetaerolite ZnMn2O4 I 4₁/amd 4/m 2/m 2/m

Other Hausmannite Information

References:

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

See Also:

Links to other databases for Hausmannite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Franklin Minerals(Dunn)
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - HyperPhysics
13 - MinDAT
14 - Mineralienatlas (Deutsch)
15 - Online Mineral Museum
16 - QUT Mineral Atlas
17 - Ruff.Info
18 - Scandinavian mineral gallery
19 - WWW-MINCRYST

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Print or Cut-and-Paste your Hausmannite Specimen Label here :

Hausmannite

Mn++Mn+++2O4
Dana No: 07.02.07.01 Strunz No: 04.BB.10
Locality:

Notes: