Chukanovite Mineral Data

General Chukanovite Information

Chemical Formula:

Fe2(CO3)(OH)2

Composition:

Molecular Weight = 206.88 gm

Magnesium 0.12 % Mg 0.19 % MgO

Iron 53.18 % Fe 68.41 % FeO

Nickel 0.57 % Ni 0.72 % NiO

Hydrogen 1.22 % H 10.88 % H₂O

Carbon 5.40 % C 19.78 % CO₂

Oxygen 39.52 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺_1.97Ni_0.02Mg_0.01(CO₃)_0.93(OH)_2.14(H₂O)_0.18

Environment:

Product of terrestrial alteration of found in cavities in a meteorite (ataxite iron meteorite mainly consisting of kamacite and containing minor amounts of taenite and chromite). Ma lachite group.

IMA Status:

Approved IMA 2005 (Dana # Added)

Locality:

Dronino meteorite, Kasimov District, Ryazan Oblast, Russia Link to MinDat.org Location Data.

Name Origin:

Named for Nikita V. Chukanov (b. 1953), Russian physicist and mineralogist.

Synonym:

IMA2005-039

Chukanovite Image

Images:

Chukanovite

Comments: Left - acicular to fibrous individuals of chukanovite. Right - spherulites of chukanovite up to 1 mm (Eur. J. Mineral, v19:891).
Location: Found in cavities of weathered fragments of the Dronino ataxite iron eteorite found near the Dronino village, Kasimov district, Ryazanâ€™ Oblast, Russia. Scale: See Images.
© Eur. J. Mineral

Chukanovite Crystallography

Axial Ratios:

a:b:c =1.3177:1:0.3417

Cell Dimensions:

a = 12.396, b = 9.407, c = 3.2152, Z = 4; beta = 97.78° V = 371.47 Den(Calc)= 3.70

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/a

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

By Intensity(I/I_o): 2.645(1)(230), 3.73(0.8)(310), 5.15(0.6)(231),2.171(0.4)(520), 2.361(0.4)(510), 6.14(0.4)(200),

Physical Properties of Chukanovite

Cleavage:

{021} Perfect

Color:

Pale green, Colorless.

Diaphaneity:

Transparent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Habit:

Fibrous - Crystals made up of fibers.

Hardness:

3.5-4 - Copper Penny-Fluorite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Chukanovite

Gladstone-Dale:

CI calc= 0.042 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2003,KC= 0.209
Ncalc = 1.77

Optical Data:

Biaxial (-), a=1.673, b=1.77, g=1.78, bire=0.1070

Calculated Properties of Chukanovite

Electron Density:

Bulk Density (Electron Density)=3.61 gm/cc
note: Specific Gravity of Chukanovite =3.70 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Chukanovite= 16.18 barns/electron
U=PE_Chukanovite x rElectron Density= 58.36 barns/cc.

Radioactivity:

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

Chukanovite Classification

Dana Class:

16a.03.02.04 (16a)Carbonates - Hydroxyl or Halogen

(16a.03)where (A B)2 (XO3) Zq

(16a.03.02)Malachite Group

16a.03.02.01 Malachite Cu2(CO3)(OH)2 P 2₁/a 2/m

16a.03.02.02 Nullaginite Ni2(CO3)(OH)2 P 2₁/m,P 2₁ Mono

16a.03.02.03 Pokrovskite Mg2(CO3)(OH)2•0.5(H2O) P 2₁/a 2/m

16a.03.02.04 Chukanovite! Fe2(CO3)(OH)2 P 2₁/a 2/m

Strunz Class:

05.BA.10 05 - CARBONATES (NITRATES)

05.B - Carbonates with additional anions, without H2O

05.BA -With Cu, Co, Ni, Zn, Mg, Mn

05.BA.10 Nullaginite Ni2(CO3)(OH)2 P 2₁/m,P 2₁ Mono

05.BA.10 Georgeite Cu5(CO3)3(OH)4•6(H2O) None

05.BA.10 Malachite Cu2(CO3)(OH)2 P 2₁/a 2/m

05.BA.10 Glaukosphaerite (Cu,Ni)2(CO3)(OH)2 P 2₁/a 2/m

05.BA.10 Mcguinnessite (Mg,Cu)2(CO3)(OH)2 P 2/a or P 2₁/a 2/m

05.BA.10 Kolwezite (Cu,Co)2(CO3)(OH)2 P1 or P1 Tri

05.BA.10 Pokrovskite Mg2(CO3)(OH)2•0.5(H2O) P 2₁/a 2/m

05.BA.10 Rosasite (Cu,Zn)2(CO3)(OH)2 P 2₁/a 2/m

05.BA.10 Zincrosasite (Zn,Cu)2(CO3)(OH)2 P 2₁/a 2/m

05.BA.10 Chukanovite! Fe2(CO3)(OH)2 P 2₁/a 2/m

Other Chukanovite Information

References:

NAME( AmMin, v93:1687) PHYS. PROP.(AmMin, v93:1687) OPTIC PROP.(AmMin, v93:1687)

See Also:

Links to other databases for Chukanovite :
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 Chukanovite Specimen Label here :

Chukanovite

Fe2(CO3)(OH)2
Dana No: 16a.03.02.04 Strunz No: 05.BA.10
Locality:

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