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Donathite Mineral Data

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General Donathite Information

Help on Chemical  Formula: Chemical Formula: (Fe++,Mg)(Cr,Fe+++)2O4
Help on Composition: Composition: Molecular Weight = 222.61 gm
   Magnesium   1.09 %  Mg    1.81 % MgO
   Chromium   35.04 %  Cr   51.21 % Cr2O3
   Iron       35.12 %  Fe   29.05 % FeO / 17.93 % Fe2O3
   Oxygen     28.75 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+0.9Mg0.1Cr1.5Fe3+0.5O4
Help on Environment: Environment: Discredited as a mixture of two spinels, one cubic and one tetragonal.
Help on IMA Status: IMA Status: Discredited IMA 1998 - Published 1969
Help on Locality: Locality: Hestmand´┐Ż Island, Norway. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for M. Donath, who described the material in I930.
Help on Synonym: Synonym: Discredited
 

Donathite Image

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  Donathite

Comments: Black granular donathite on iron.
Location: Hestmondo Island, Nordland, Norway. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Donathite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.99556
Help on Cell Dimensions: Cell Dimensions: a = 8.342, c = 8.305, Z = 10; V = 577.94 Den(Calc)= 6.40
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: P 4/nnm
 

Physical Properties of Donathite

Help on Cleavage: Cleavage: None
Help on Color: Color: Black.
Help on Density: Density: 5
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 6.5-7 - Pyrite-Quartz
Help on Luster: Luster: Metallic
Help on Streak: Streak: black brown
 

Optical Properties of Donathite

Help on Optical Data: Optical Data: NCalc= 2.68 - from Gladstone-Dale relationship (KC = 0.2632) where Ncalc=Dcalc*KC+1
NCalc= 2.32 - from Gladstone-Dale relationship (KC = 0.2632) where Ncalc=Dmeas*KC+1
 

Calculated Properties of Donathite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.07 gm/cc
note: Specific Gravity of Donathite =6.40 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEDonathite = 18.79 barns/electron
U=PEDonathite x rElectron Density= 114.07 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Donathite is Not Radioactive
 

Donathite Classification

Help on  Dana Class: Dana Class: 04.00.00.00 (04)Oxide Minerals
  (04.00)Without Dana Classification Numbers
  (04.00.00)Oxide
 
04.00.00.00 Ashanite? (Nb,Ta,U,Fe,Mn)4O8 Pcan 2/m 2/m 2/m
 
04.00.00.00 Chubutite* Pb7O6Cl2 Unk Ortho
 
04.00.00.00 Clinobirnessite* Na4Mn14O27•9(H2O) Mono
 
04.00.00.00 Donathite? (Fe,Mg)(Cr,Fe)2O4 P 4/nnm 4/m 2/m 2/m
 
04.00.00.00 IMA2008-022 UO2(OH)2 pseudo-orthorhombic Mono
 
04.00.00.00 Krasnogorite* WO3 Pmnb 2/m 2/m 2/m
 
04.00.00.00 Mengxianminite* (Ca,Na)3(Fe,Mn)2Mg2(Sn,Zn)5Al8O29 Unk Ortho
 
04.00.00.00 Romanite* (Fe,U,Pb)2(Ti,Fe)O4 Trig ? Trig
 
04.00.00.00 Tantalowodginite* (Mn2,[])4Ta4Ta8O32 C 2/c 2/m
 
04.00.00.00 Ungursaite* NaCa5(Ta,Nb)24O65(OH) P 63/m,P 63 Hex
 
04.00.00.00 Wolframoixiolite* (Fe,Mn,Nb)(Nb,W,Ta)O4 Pc 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 Donathite Information

Help on References: References: NAME( AmMin, V83, p189) PHYS. PROP.(AmMin, V83, p189)
Help on See Also: See Also: Links to other databases for Donathite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Donathite

(Fe++,Mg)(Cr,Fe+++)2O4
Dana No: 04.00.00.00 Strunz No: 04.BB.05
Locality:

 

Notes:

 

 
   
 


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