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Brunogeierite Mineral Data

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General Brunogeierite Information

Help on Chemical  Formula: Chemical Formula: (Ge++,Fe++)Fe+++2O4
Help on Composition: Composition: Molecular Weight = 244.11 gm
   Iron       51.47 %  Fe    7.36 % FeO / 65.42 % Fe2O3
   Germanium  22.31 %  Ge   32.14 % GeO2
   Oxygen     26.22 %  O
             ______        ______ 
             100.00 %      104.92 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ge0.75Fe2+0.25Fe3+2O4
Help on Environment: Environment: In the lower oxidation zone of a dolostone-hosted hydrothermal polymetallic ore deposit, at a depth of 930 meters. Encrusting tennantite and inclusions in sphalerite and magnetite.
Help on IMA Status: IMA Status: Approved IMA 1972
Help on Locality: Locality: From Tsumeb, Namibia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Dr. Bruno H. Geier (1902- ), formerly Chief Mineralogist, Tsumeb Corporation, Tsumeb, Namibia.
Help on Name Pronunciation: Name Pronunciation: Brunogeierite + Pronunciation Say BRUNOGEIERITE
 

Brunogeierite Image

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  Stottite   Brunogeierite

Comments: Brownish gray, cubic (tetartoidal) brunogeierite crystals with earthy gray stottite and zincian siderite matrix.
Location: Tsumeb, Namibia. Scale: Cabinent Size.
© William Pinch

Brunogeierite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 8.409, Z = 8; V = 594.61 Den(Calc)= 5.45
Help on Crystal System: Crystal System: Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.54(1), 1.484(0.9), 1.615(0.7),
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Physical Properties of Brunogeierite

Help on Color: Color: Gray, Black.
Help on Density: Density: 5.51
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Sub Metallic
 

Optical Properties of Brunogeierite

Help on Optical Data: Optical Data: NCalc= 2.49 - from Gladstone-Dale relationship (KC = 0.2736) where Ncalc=Dcalc*KC+1
NCalc= 2.51 - from Gladstone-Dale relationship (KC = 0.2736) where Ncalc=Dmeas*KC+1
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Brunogeierite in Air
λ R  ∑ R(λ) 
 400 nm   15.50   
 420 nm   15.00 
 440 nm   14.50 
 460 nm   14.10 
 480 nm   13.80 
 500 nm   13.60 
 520 nm   13.40 
 540 nm   13.30 
 560 nm   13.20 
 580 nm   13.10 
 600 nm   13.00 
 620 nm   13.00 
 640 nm   12.90 
 660 nm   12.80 
 680 nm   12.80 
 700 nm   12.80 
Calculated Relative Intensity Colors of Brunogeierite in Air
Relative
Intensity
   0%   70% 100% 140% 210% 280% 350% 420% 490% 560% 630% 670%
R                        
 

Calculated Properties of Brunogeierite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.11 gm/cc
note: Specific Gravity of Brunogeierite =5.45 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEBrunogeierite = 29.72 barns/electron
U=PEBrunogeierite x rElectron Density= 151.93 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Brunogeierite is Not Radioactive
 

Brunogeierite Classification

Help on  Dana Class: Dana Class: 07.02.02.07 (07)Multiple Oxides
  (07.02)(A+ B++)2 X4 Spinel group
  (07.02.02)(Iron subgroup)
 
07.02.02.01 Magnesioferrite MgFe2O4 F d3m 4/m 3 2/m
 
07.02.02.02 Jacobsite (Mn,Fe,Mg)(Fe,Mn)2O4 F d3m 4/m 3 2/m
 
07.02.02.03 Magnetite FeFe2O4 F d3m 4/m 3 2/m
 
07.02.02.04 Franklinite (Zn,Mn,Fe)(Fe,Mn)2O4 F d3m 4/m 3 2/m
 
07.02.02.05 Trevorite NiFe2O4 F d3m 4/m 3 2/m
 
07.02.02.06 Cuprospinel (Cu,Mg)Fe2O4 F d3m 4/m 3 2/m
 
07.02.02.07 Brunogeierite (Ge,Fe)Fe2O4 F d3m 4/m 3 2/m
Help on  Strunz Class: Strunz Class: 04.BB.05 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.05 Cochromite (Co,Ni,Fe)(Cr,Al)2O4 F d3m 4/m 3 2/m
 
04.BB.05 Filipstadite (Mn,Mg)4SbFeO8 pseudo ISO 2/m 2/m 2/m
 
04.BB.05 Magnetite FeFe2O4 F d3m 4/m 3 2/m
 
04.BB.05 Gahnite ZnAl2O4 F d3m 4/m 3 2/m
 
04.BB.05 Chromite FeCr2O4 F d3m 4/m 3 2/m
 
04.BB.05 Galaxite (Mn,Mg)(Al,Fe)2O4 F d3m 4/m 3 2/m
 
04.BB.05 Cuprospinel (Cu,Mg)Fe2O4 F d3m 4/m 3 2/m
 
04.BB.05 Donathite? (Fe,Mg)(Cr,Fe)2O4 P 4/nnm 4/m 2/m 2/m
 
04.BB.05 Brunogeierite (Ge,Fe)Fe2O4 F d3m 4/m 3 2/m
 
04.BB.05 Coulsonite FeV2O4 F d3m 4/m 3 2/m
 
04.BB.05 Hercynite FeAl2O4 F d3m 4/m 3 2/m
 
04.BB.05 Franklinite (Zn,Mn,Fe)(Fe,Mn)2O4 F d3m 4/m 3 2/m
 
04.BB.05 Jacobsite (Mn,Fe,Mg)(Fe,Mn)2O4 F d3m 4/m 3 2/m
 
04.BB.05 Magnesiochromite MgCr2O4 F d3m 4/m 3 2/m
 
04.BB.05 Magnesioferrite MgFe2O4 F d3m 4/m 3 2/m
 
04.BB.05 Magnesiocoulsonite MgV2O4 F d3m 4/m 3 2/m
 
04.BB.05 Manganochromite (Mn,Fe)(Cr,V)2O4 F d3m 4/m 3 2/m
 
04.BB.05 Qandilite (Mg,Fe)2(Ti,Fe,Al)O4 F d3m 4/m 3 2/m
 
04.BB.05 Nichromite (Ni,Co,Fe)(Cr,Fe,Al)2O4 F d3m 4/m 3 2/m
 
04.BB.05 Spinel MgAl2O4 F d3m 4/m 3 2/m
 
04.BB.05 Ulvospinel TiFe2O4 F d3m 4/m 3 2/m
 
04.BB.05 Zincochromite ZnCr2O4 F d3m 4/m 3 2/m
 
04.BB.05 Trevorite NiFe2O4 F d3m 4/m 3 2/m
 
04.BB.05 Vuorelainenite (Mn,Fe)(V,Cr)2O4 F d3m 4/m 3 2/m
 

Other Brunogeierite Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Brunogeierite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Brunogeierite

(Ge++,Fe++)Fe+++2O4
Dana No: 07.02.02.07 Strunz No: 04.BB.05
Locality:

 

Notes:

 

 
   
 


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