Droninoite Mineral Data

General Droninoite Information

Chemical Formula:

Ni3Fe+++Cl(OH)8•2H2O

Composition:

Molecular Weight = 442.09 gm

Iron 21.73 % Fe 12.19 % FeO / 17.52 % Fe₂O₃

Nickel 28.68 % Ni 36.49 % NiO

Hydrogen 2.66 % H 23.76 % H₂O

Chlorine 12.99 % Cl 12.99 % Cl

- % Cl -2.93 % -O=Cl₂

Oxygen 33.95 % O

______ ______

100.00 % 100.02 % = TOTAL OXIDE

Empirical Formula:

Ni_2.16Fe²⁺_0.75Fe³⁺_0.97Cl_1.62(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, Ryazanï¿½ Oblast, 350 km south-east of Moscow, Russia Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

IMA2008-003

Droninoite Crystallography

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

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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),

Physical Properties of Droninoite

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)

Optical Properties of Droninoite

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.

Calculated Properties of Droninoite

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:

PE_Droninoite= 18.49 barns/electron
U=PE_Droninoite x rElectron Density= 52.50 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Droninoite is Not Radioactive

Droninoite Classification

Dana Class:

16b.06.02.05 (16b)Carbonates - Hydroxyl or Halogen

(16b.06)Dana Type

(16b.06.02)Sjorgrenite-Hydrotalcite Group (Hydrotalcite Subgroup:Rhombohedral)

16b.06.02.01 Hydrotalcite Mg6Al2(CO3)(OH)16•4(H2O) R 3m 3 2/m

16b.06.02.02 Stichtite Mg6Cr2(CO3)(OH)16•4(H2O) R 3m 3 2/m

16b.06.02.03 Pyroaurite Mg6Fe2(CO3)(OH)16•4(H2O) R 3m 3 2/m

16b.06.02.04 Desautelsite Mg6Mn2(CO3)(OH)16•4(H2O) R 3m or R 3m Trig

16b.06.02.05 Droninoite! Ni3FeCl(OH)8•2H2O R 3m, R 3m or R 32 Trig

Strunz Class:

03.DA.60 03 - HALIDES

03.D - Oxyhalides, Hydroxyhalides and Related Double Halides

03.DA -With Cu, etc., without Pb

03.DA.60 Droninoite! Ni3FeCl(OH)8•2H2O R 3m, R 3m or R 32 Trig

Other Droninoite Information

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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