Avdoninite Mineral Data

General Avdoninite Information

Chemical Formula:

K2Cu5Cl8(OH)4•H2O

Composition:

Molecular Weight = 765.55 gm

Potassium 10.01 % K 12.06 % K₂O

Copper 41.50 % Cu 51.95 % CuO

Hydrogen 0.78 % H 6.98 % H₂O

Chlorine 37.46 % Cl 37.46 % Cl

- % Cl -8.45 % -O=Cl₂

Oxygen 10.24 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K_1.96Cu₅Cl_8.09(OH)_3.87•1.03(H₂O)

Environment:

Fumarole exhalation sediments.

IMA Status:

Approved IMA 2005 (Dana # Added)

Locality:

Yadovitaya fumarole in the Second Cinder Cone at the Northern Breach of the Great Fissure Tolbachik Eruption, Tolbachik volcano, Kamchatka Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Vladimir Nikolaevich Avdonin (b 1925), a senior researcher of the Ural Geological Museum of the Ural State Mining University.

Synonym:

IMA2005-046a

Avdoninite Image

Images:

Avdoninite

Comments: Aggregates of green avdoninite crystals.
Location: Blyava Cu Mine, Southern Urals, Russia. Scale: Specimen size 1.5 x 2 cm.
© Diederik Visser

Avdoninite Crystallography

Axial Ratios:

a:b:c =4.1408:1:1.9778

Cell Dimensions:

a = 24.34, b = 5.878, c = 11.626, Z = 4; beta = 86.7° V = 1,660.58 Den(Calc)= 3.06

Crystal System:

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

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

By Intensity(I/I_o): 11.63(1), 5.8(0.27), 5.88(0.2),2.518(0.19), 2.321(0.17), 5.73(0.17), 3.052(0.15), 5.12(0.12),

Physical Properties of Avdoninite

Color:

Green.

Density:

3.03

Diaphaneity:

Transparent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

3 - Calcite

Luster:

Vitreous (Glassy)

Streak:

pale green

Optical Properties of Avdoninite

Optical Data:

Biaxial (+/-), a=1.669, b=1.688, g=1.707, bire=0.0380

Calculated Properties of Avdoninite

Electron Density:

Bulk Density (Electron Density)=2.92 gm/cc
note: Specific Gravity of Avdoninite =3.06 gm/cc.

Fermion Index:

Fermion Index = 0.0000623384
Boson Index = 0.9999376616

Photoelectric:

PE_Avdoninite= 21.88 barns/electron
U=PE_Avdoninite x r_electron= 63.82 barns/cc.

Radioactivity:

GRapi = 137.68 (Gamma Ray American Petroleum Institute Units)
Concentration of Avdoninite per GRapi unit = 0.73 (%)

Estimated Radioactivity from Avdoninite - barely detectable

Avdoninite Classification

Dana Class:

12.01.12.01 (12)Compound Halides

(12.01)with miscellaneous anions

(12.01.12)Dana Group

12.01.12.01 Avdoninite! K2Cu5Cl8(OH)4•H2O P 2/m or P 2₁/m 2/m

Strunz Class:

03.DA.55 03 - HALIDES

03.D - Oxyhalides, Hydroxyhalides and Related Double Halides

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

03.DA.55 Avdoninite! K2Cu5Cl8(OH)4•H2O P 2/m or P 2₁/m 2/m

Other Avdoninite Information

References:

NAME( Geology of Ore Deposits, v49:505) PHYS. PROP.(Geology of Ore Deposits, v49:505) OPTIC PROP.(Geology of Ore Deposits, v49:505)

See Also:

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

Avdoninite

K2Cu5Cl8(OH)4•H2O
Dana No: 12.01.12.01 Strunz No: 03.DA.55
Locality:

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