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Brunogeierite

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Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia
© Paul De Bondt

Show Brunogeierite Photos (6)



Formula:
Fe
2+
2
Ge
4+
 
O
 
4
Some solid solution towards magnetite: Fe2+Ge4+ = 2Fe3+.
System:IsometricColour:Grey-black
Hardness:5
Member of:Spinel Group > Spinel Group
Name: Named after Dr. Bruno H. Geier (1902-1987), former Chief Mineralogist, Tsumeb Corporation.
This page provides mineralogical data about Brunogeierite.

Classification of Brunogeierite

IMA status:Approved 1972
Strunz 8th edition ID:4/B.0-50
Nickel-Strunz 10th (pending) edition ID:4.BB.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
B : Metal: Oxygen = 3:4 and similar
B : With only medium-sized cations
Dana 8th edition ID:7.2.2.7

7 : MULTIPLE OXIDES
2 : AB2X4
Hey's CIM Ref.:7.11.15

7 : Oxides and Hydroxides
11 : Oxides of Sn and Pb
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Type Occurrence of Brunogeierite

Type Locality:Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia
Year of Discovery:1972
Geological Setting of type material:Lower oxidation zone of dolostone-hosted hydrothermal polymetallic ore deposit at 930 m depth, formed by alteration of Ge-rich sulfides.

Physical Properties of Brunogeierite

Lustre:Sub-Metallic
Diaphaneity (Transparency):Opaque
Colour:Grey-black
Hardness (Mohs):5
Density (calculated):5.51 g/cm3

Crystallography of Brunogeierite

Crystal System:Isometric
Class (H-M):m3m (4/m 3 2/m) - Hexoctahedral
Space Group:Fd3m {F41/d 3 2/m}
Cell Parameters:a = 8.409 - 8.416Å
Unit Cell Volume:V 594.61 ų (Calculated from Unit Cell)
Z:8
Morphology:Crystals rare. Usually as crusts or rims on tennantite (Tsumeb) or inclusions in sphalerite or magnetite (France).
X-Ray Powder Diffraction:
d-spacingIntensity
2.540 (10)
1.484 (9)
1.615 (7)
2.972 (6)
1.095 (6)
1.720 (4)
1.283 (3)

Optical Data of Brunogeierite

Type:Isotropic
Reflectivity:
400 nmR=15.5%
420 nmR=15.0%
440 nmR=14.5%
460 nmR=14.1%
480 nmR=13.8%
500nmR=13.6%
520 nmR=13.4%
540 nmR=13.3%
560 nmR=13.2%
580 nmR=13.1%
600 nmR=13.0%
620 nmR=13.0%
640 nmR=12.9%
660 nmR=12.8%
680 nmR=12.8%
700 nmR=12.8%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 15.5%.
Colour in reflected light:Grey
Internal Reflections:Brown

Chemical Properties of Brunogeierite

Formula:
Fe
2+
2
Ge
4+
 
O
 
4


Some solid solution towards magnetite: Fe2+Ge4+ = 2Fe3+.
Essential elements:Fe, Ge, O
All elements listed in formula:Fe, Ge, O

Relationship of Brunogeierite to other Species

Member of:Spinel Group > Spinel Group
Related Minerals - Nickel-Strunz Grouping):

- +
4.BB.05Chromite
Fe(Cr,Al,Fe)
 
2
O
 
4
4.BB.05Cochromite
(Co,Ni,Fe)(Cr,Al)
 
2
O
 
4
4.BB.05Coulsonite
Fe
2+
 
V
3+
2
O
 
4
4.BB.05Cuprospinel
Cu
2+
 
Fe
3+
2
O
 
4
4.BB.05Filipstadite
(Mn,Mg)
 
2
(Sb
 
.5
Fe
 
.5
)O
 
4
4.BB.05Franklinite
Zn
2+
 
Fe
3+
2
O
 
4
4.BB.05Gahnite
ZnAl
 
2
O
 
4
4.BB.05Galaxite
(Mn,Fe,Mg)(Al,Fe)
 
2
O
 
4
4.BB.05Hercynite
Fe
2+
 
Al
 
2
O
 
4
4.BB.05Jacobsite
Mn
2+
 
Fe
3+
2
O
 
4
4.BB.05Manganochromite
(Mn,Fe)(Cr,V)
 
2
O
 
4
4.BB.05Magnesiocoulsonite
MgV
 
2
O
 
4
4.BB.05Magnesiochromite
Mg(Cr,Al,Fe)
 
2
O
 
4
4.BB.05Magnesioferrite
MgFe
3+
2
O
 
4
4.BB.05Magnetite
Fe
2+
 
Fe
3+
2
O
 
4
4.BB.05Nichromite
(Ni,Co,Fe)(Cr,Fe,Al)
 
2
O
 
4
4.BB.05Qandilite
(Mg,Fe)
 
2
(Ti,Fe,Al)O
 
4
4.BB.05Spinel
MgAl
 
2
O
 
4
4.BB.05Trevorite
Ni
2+
 
Fe
3+
2
O
 
4
4.BB.05Ulvöspinel
Fe
 
2
TiO
 
4
4.BB.05Vuorelainenite
(Mn,Fe)(V,Cr)
 
2
O
 
4
4.BB.05Zincochromite
ZnCr
 
2
O
 
4
4.BB.10Hausmannite
MnMn
 
2
O
 
4
4.BB.10Hetaerolite
ZnMn
 
2
O
 
4
4.BB.10Hydrohetaerolite
ZnMn
 
2
O
 
4
 · H
 
2
O
4.BB.10Iwakiite
Mn(Fe,Mn)
 
2
O
 
4
4.BB.15Maghemite
Fe
3+
2
O
 
3
4.BB.15Titanomaghemite
Fe
3+
 
(Fe
3+
 
,Ti
4+
 
,Fe
2+
 
,◻)
 
2
O
 
4
4.BB.20Tegengrenite
(Mg,Mn
2+
 
)
 
2
Sb
5+
0.5
(Mn
3+
 
,Si,Ti)
 
0.5
O
 
4
4.BB.25Xieite
Fe
2+
 
Cr
 
2
O
 
4
Related Minerals - Hey's Index Grouping:

- +
7.11.1Romarchite
SnO
7.11.2Cassiterite
SnO
 
2
7.11.4Schoenfliesite
Mg[Sn(OH)
 
6
]
7.11.5Burtite
Ca[Sn(OH)
 
6
]
7.11.6Vismirnovite
Zn[Sn(OH)
 
6
]
7.11.7Wickmanite
Mn
2+
 
[Sn(OH)
 
6
]
7.11.8Tetrawickmanite
Mn
2+
 
[Sn
4+
 
(OH)
 
6
]
7.11.9Jeanbandyite
(Fe
2+
 
,Mn
2+
 
)[Sn
4+
 
(OH)
 
6
]
7.11.10Natanite
Fe
2+
 
[Sn(OH)
 
6
]
7.11.11Mushistonite
(Cu,Zn,Fe
2+
 
)[Sn(OH)
 
6
]
7.11.12Ferronigerite-2N1S
Sn(Fe,Mg)Al
 
6
O
 
11
(OH)
7.11.13Magnesionigerite
7.11.14Argutite
GeO
 
2
7.11.16Stottite
Fe
2+
 
[Ge
4+
 
(OH)
 
6
]
7.11.17Carboirite
FeAl
 
2
(GeO
 
4
)O(OH)
 
2
7.11.18Otjisumeite
PbGe
 
4
O
 
9
7.11.19Bartelkeite
PbFe
2+
 
Ge
 
3
O
 
8
7.11.20Massicot
PbO
7.11.21Litharge
PbO
7.11.22Minium
Pb
 
3
O
 
4
7.11.23Plattnerite
PbO
 
2
7.11.24Scrutinyite
alpha-PbO
 
2
7.11.25Murdochite
PbCu
 
6
O
 
8-x
(Cl,Br)
 
2x
 where x<=0.5
7.11.26Macedonite
PbTiO
 
3
7.11.27Cesàrolite
PbH
 
2
Mn
 
3
O
 
8
7.11.28Coronadite
Pb(Mn
4+
 
,Mn
3+
 
)
 
8
O
 
16
7.11.29Quenselite
PbMnO
 
2
(OH)
7.11.30Plumboferrite
Pb
 
2
Fe
3+
11-x
Mn
2+
x
O
 
19-2x
, x = 1/3
7.11.31Magnetoplumbite
(Pb,Mn)(Fe,Mn)
 
12
O
 
19
7.11.32Senaite
Pb(Ti,Fe,Mn)
 
21
O
 
38

Other Names for Brunogeierite

Synonyms:
IMA1972-004
Other Languages:
German:Brunogeierit
Russian:Бруногайерит
Spanish:Brunogeierita

Other Information

Magnetism:Ferromagnetic
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Brunogeierite

Reference List:

- +
American Mineralogist: 58: 348.

Neues Jahrbuch für Mineralogie, Monatshefte (1972): 263-267.

Internet Links for Brunogeierite

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  • Brunogeierite details from Handbook of Mineralogy (PDF)
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    • Localities for Brunogeierite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    France
     
    • Midi-Pyrénées
      • Ariège
        • Cauflens
    		F. Aye, J. Bouladon, P. Picot, G. Pouit : "Quelques exemples d'apport de la minéralogie à la connaissance et à la recherche des gîtes minéraux" , Bull. Mineral. , 1978, 101, 139-147
        • Saint-Girons
    		F. Aye, J. Bouladon, P. Picot, G. Pouit : "Quelques exemples d'apport de la minéralogie à la connaissance et à la recherche des gîtes minéraux" , Bull. Mineral. , 1978, 101, 139-147
      • Haute-Garonne
        • Argut-Dessus
    		F. Aye, J. Bouladon, P. Picot, G. Pouit : "Quelques exemples d'apport de la minéralogie à la connaissance et à la recherche des gîtes minéraux" , Bull. Mineral. , 1978, 101, 139-147
    F. Aye, J. Bouladon, P. Picot, G. Pouit : "Quelques exemples d'apport de la minéralogie à la connaissance et à la recherche des gîtes minéraux" , Bull. Mineral. , 1978, 101, 139-147
        • Luchon
    		F. Aye, J. Bouladon, P. Picot, G. Pouit : "Quelques exemples d'apport de la minéralogie à la connaissance et à la recherche des gîtes minéraux" , Bull. Mineral. , 1978, 101, 139-147
    F. Aye, J. Bouladon, P. Picot, G. Pouit : "Quelques exemples d'apport de la minéralogie à la connaissance et à la recherche des gîtes minéraux" , Bull. Mineral. , 1978, 101, 139-147
    F. Aye, J. Bouladon, P. Picot, G. Pouit : "Quelques exemples d'apport de la minéralogie à la connaissance et à la recherche des gîtes minéraux" , Bull. Mineral. , 1978, 101, 139-147
        • Saint-Béat
          • Plan-du-Rey
            • Couledoux
    		F. Aye, J. Bouladon, P. Picot, G. Pouit : "Quelques exemples d'apport de la minéralogie à la connaissance et à la recherche des gîtes minéraux" , Bull. Mineral. , 1978, 101, 139-147
      • Hautes-Pyrénées
        • Lourdes
    		F. Aye, J. Bouladon, P. Picot, G. Pouit : "Quelques exemples d'apport de la minéralogie à la connaissance et à la recherche des gîtes minéraux" , Bull. Mineral. , 1978, 101, 139-147
    Namibia
     
    • Otjikoto (Oshikoto) Region
      • Tsumeb
    		NJMM (1972), 263
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