Averievite Mineral Data

General Averievite Information

Chemical Formula:

Cu5(VO4)2O2•CuCl2

Composition:

Molecular Weight = 714.06 gm

Vanadium 14.27 % V 25.47 % V₂O₅

Copper 53.40 % Cu 66.84 % CuO

Chlorine 9.93 % Cl 9.93 % Cl

- % Cl -2.24 % -O=Cl₂

Oxygen 22.41 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cu₆(VO₄)₂O₂Cl₂

Environment:

Fumarole deposits. Related to stoiberite.

IMA Status:

Approved IMA 1997 (Dana # Added)

Locality:

The Second North Fracture cone of the Main Tolbachik Fracture Eruption, Kamchatka, Russia. Link to MinDat.org Location Data.

Name Origin:

Name for V. V. Averiev (1929-1968), Russian volcanologist.

Name Pronunciation:

Averievite + Pronunciation

Synonym:

IMA1995-027

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Averievite Crystallography

Axial Ratios:

a:c = 1:1.31749

Cell Dimensions:

a = 6.375, c = 8.399, Z = 1; V = 295.61 Den(Calc)= 4.01

Crystal System:

Trigonal - PyramidalH-M Symbol (3) Space Group: P 3

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

By Intensity(I/I_o): 2.315(1), 3.43(0.7), 2.81(0.4),

Forms:

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Forms: ( 1 0 0) ( 0 1 0) ( 0 0 1)

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Crystal Structure:

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Starova G L , Krivovichev S V , Fundamensky V S , Filatov S K , Mineralogical Magazine , 61 (1997) p.441-446, The crystal structure of averievite, Cu5O2(VO4)2*nMX:, comparison with related compounds, Note: Coordinates for O6 added to the dataset by Krivovichev Aug 2005, Locality: Main Tolbachik Fracture Eruption of Kamchatka

Physical Properties of Averievite

Cleavage:

{100} Good

Color:

Black.

Density:

3.54 - 3.97, Average = 3.75

Diaphaneity:

Opaque

Fracture:

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

Habit:

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

Habit:

Pseudo Hexagonal - Crystals show a hexagonal outline.

Hardness:

4 - Fluorite

Luster:

Resinous - Metallic

Streak:

black

Optical Properties of Averievite

Optical Data:

NCalc= 1.93 - from Gladstone-Dale relationship (KC = 0.2316) where Ncalc=Dcalc*KC+1
NCalc= 1.87 - from Gladstone-Dale relationship (KC = 0.2316) where Ncalc=Dmeas*KC+1

Calculated Properties of Averievite

Electron Density:

Bulk Density (Electron Density)=3.75 gm/cc
note: Specific Gravity of Averievite =4.01 gm/cc.

Fermion Index:

Fermion Index = 0.0004642542
Boson Index = 0.9995357458

Photoelectric:

PE_Averievite= 27.49 barns/electron
U=PE_Averievite x rElectron Density= 103.14 barns/cc.

Radioactivity:

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

Averievite Classification

Dana Class:

41.04.05.02 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.04)where (A B)5 (XO4)2 Zq

(41.04.05)Dana Group

41.04.05.01 Stoiberite Cu5V2O10 P 2₁/n 2/m

41.04.05.02 Averievite! Cu5(VO4)2O2•CuCl2 P 3 3

Strunz Class:

08.BB.85 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BB -With only medium-sized cations, (OH, etc.):RO4 £ 1:1

08.BB.85 Averievite! Cu5(VO4)2O2•CuCl2 P 3 3

Other Averievite Information

References:

NAME( MinRec) PHYS. PROP.(Min.Mag.,Vol.61,p441-446,1997)

See Also:

Links to other databases for Averievite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Print or Cut-and-Paste your Averievite Specimen Label here :

Averievite

Cu5(VO4)2O2•CuCl2
Dana No: 41.04.05.02 Strunz No: 08.BB.85
Locality:

Notes: