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Droninoite Mineral Data
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General Droninoite Information
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Chemical Formula: |
Ni3Fe+++Cl(OH)8•2H2O |
Composition: |
Molecular Weight = 442.09 gm |
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Iron 21.73 % Fe 12.19 % FeO / 17.52 % Fe2O3 |
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Nickel 28.68 % Ni 36.49 % NiO |
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Hydrogen 2.66 % H 23.76 % H2O |
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Chlorine 12.99 % Cl 12.99 % Cl |
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- %
Cl -2.93 % -O=Cl2 |
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Oxygen 33.95 % O |
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______ ______ |
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100.00 % 100.02 % = TOTAL OXIDE |
Empirical Formula: |
Ni2.16Fe2+0.75Fe3+0.97Cl1.62(OH)7.1•2.28(H2O) |
Environment: |
Terrestrial alteration of an iron meteorite. Hydrotalcite group. |
IMA Status: |
Approved IMA 2008 (Dana # Added) |
Locality: |
Dronino village, Kasimov District, Ryazan� Oblast, 350 km south-east of Moscow, Russia Link to MinDat.org Location Data. |
Name Origin: |
Named for the locality. |
Synonym: |
IMA2008-003 |
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Droninoite Crystallography
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Axial Ratios: |
a:c = 1:7.44183 |
Cell Dimensions: |
a = 6.206, c = 46.184, Z = 6; V = 1,540.44 Den(Calc)= 2.86 |
Crystal System: |
Trigonal Space Group: R 3m, R 3m or R 32 |
X Ray Diffraction: |
By Intensity(I/Io): 7.76(1), 3.88(0.4), 2.64(0.25),2.32(0.2), 1.965(0.15), 1.337(0.1), 1.536(0.1), 1.546(0.1), |
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Physical Properties of Droninoite
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Color: |
Dark green, Brown. |
Diaphaneity: |
Transparent to Translucent |
Habit: |
Friable - Loosley cohesive material that granulates with your fingers. |
Hardness: |
1-1.5 - Talc or a little harder |
Luster: |
Earthy (Dull) |
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Optical Properties of Droninoite
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Gladstone-Dale: |
CI calc= 0.047 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2517,KC= 0.2642 Ncalc = 1.76 |
Optical Data: |
Uniaxial (?), a=1.72. |
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Calculated Properties of Droninoite
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Electron Density: |
Bulk Density (Electron Density)=2.84 gm/cc note: Specific Gravity of Droninoite =2.86 gm/cc. |
Fermion Index: |
Fermion Index = 0.0080135914 Boson Index = 0.9919864086 |
Photoelectric: |
PEDroninoite = 18.49 barns/electron U=PEDroninoite x rElectron Density= 52.50 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Droninoite is Not Radioactive |
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Droninoite Classification
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Dana Class: |
16b.06.02.05 (16b)Carbonates - Hydroxyl or Halogen |
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(16b.06)Dana Type |
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(16b.06.02)Sjorgrenite-Hydrotalcite Group (Hydrotalcite Subgroup:Rhombohedral) |
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16b.06.02.01 Hydrotalcite Mg6Al2(CO3)(OH)16•4(H2O) R 3m 3 2/m |
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16b.06.02.02 Stichtite Mg6Cr2(CO3)(OH)16•4(H2O) R 3m 3 2/m |
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16b.06.02.03 Pyroaurite Mg6Fe2(CO3)(OH)16•4(H2O) R 3m 3 2/m |
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16b.06.02.04 Desautelsite Mg6Mn2(CO3)(OH)16•4(H2O) R 3m or R 3m Trig |
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16b.06.02.05 Droninoite! Ni3FeCl(OH)8•2H2O R 3m, R 3m or R 32 Trig |
Strunz Class: |
03.DA.60 03 - HALIDES |
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03.D - Oxyhalides, Hydroxyhalides and Related Double Halides |
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03.DA -With Cu, etc., without Pb |
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03.DA.60 Droninoite! Ni3FeCl(OH)8•2H2O R 3m, R 3m or R 32 Trig |
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Other Droninoite Information
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References: |
NAME( Proceedings of the Russian Min. Soc. V137:38) PHYS. PROP.(Proceedings of the Russian Min. Soc. V137:38) |
See Also: |
Links to other databases for Droninoite :
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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Print or Cut-and-Paste your Droninoite Specimen Label here :
Droninoite
Ni3Fe+++Cl(OH)8•2H2O
Dana No: 16b.06.02.05 Strunz No: 03.DA.60
Locality:
Notes:
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