| Donathite Mineral Data |
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- IV/B.05-10 Hausmannite MnMn2O4 I 41/amd 4/m 2/m 2/m
- IV/B.05-20 Iwakiite Mn(Fe,Mn)2O4 P 41/nnm 4/m 2/m 2/m
- IV/B.05-30 Donathite (Fe,Mg)(Cr,Fe)2O4 P 4/nnm 4/m 2/m 2/m
- IV/B.05-40 Hetaerolite ZnMn2O4 I 41/amd 4/m 2/m 2/m
- IV/B.05-50 Hydrohetaerolite Zn2Mn4O8·(H2O) I 41/amd 4/m 2/m 2/m
- IV/B.05-60 Marokite CaMn2O4 Pmab 2/m 2/m 2/m
- IV/B.05-65 Tegengrenite! (Mg,Mn)2Sb0.5(Mn,Si,Ti)0.5O4 R 3 or R 3- Trig
- IV/B.05-80 Filipstadite (Mn,Mg)4SbFeO8 pseudo ISO 2/m 2/m 2/m
General Donathite Information |
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 Chemical Formula: |
(Fe++,Mg)(Cr,Fe+++)2O4 | ||
| 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 | |||
| Empirical Formula: |
Fe2+0.9Mg0.1Cr1.5Fe3+0.5O4 | ||
| Environment: |
Mixture of two spinels, one cubic and one tetragonal. | ||
| IMA Status: |
Discredited IMA 1998 | ||
| Locality: |
Hestmandö Island, Norway. Link to MinDat.org Location Data. | ||
| Synonym: |
Discredited | ||
Donathite Image | |||
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Images:
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Donathite Crystallography |
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| Axial Ratios: |
a:c = 1:0.99556 | ||
| Cell Dimensions: |
a = 8.342, c = 8.305, Z = 10; V = 577.94 Den(Calc)= 6.40 | ||
| Crystal System: |
Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/nnm | ||
Physical Properties of Donathite |
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| Cleavage: |
None | ||
| Color: |
Black. | ||
| Density: |
5 | ||
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. | ||
| Hardness: |
6.5-7 - Pyrite-Quartz | ||
| Luster: |
Metallic | ||
| Streak: |
black brown | ||
Calculated Properties of Donathite |
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| Electron Density: |
relectron=6.07 gm/cc |
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| Fermion Index |
Fermion Index = 0.04196 Boson Index = 0.95804 |
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| Photoelectric: |
PEDonathite = 18.79 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Donathite is Not Radioactive |
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Donathite Classification |
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| Dana Class: |
4.0.0.0 (4)Oxide Minerals | ||
| (4.0)Without Dana Classification Numbers | |||
| (Oxide) | |||
| Strunz Class: |
IV/B.05-30 IV - Oxides | ||
| IV/B - Oxides with metal : oxygen = 3:4 (spinel type M3O4 and related) | |||
| IV/B.05 - Hausmannite - Filipstadite series | |||
Other Donathite Information |
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| References: |
NAME( AmMin, V83, p189) PHYS. PROP.(AmMin, V83, p189) | ||
| See Also: |
Links to other databases for Donathite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas Search for Donathite using: Visit our Advertisers for Donathite : Translate Donathite Mineral Data : Ask about Donathite here : Print or Cut-and-Paste your Donathite Specimen Label here :
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