Averievite Mineral Data

Averievite Mineral Data +

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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:

For V. V. Averiev (1929-1968), Russian volcanologist.

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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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

Diaphaniety:

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:

r_electron=3.75 gm/cc
note: r_Averievite=4.01 gm/cc.

Fermion Index

Fermion Index = 0.00046
Boson Index = 0.99954

Photoelectric:

PE_Averievite= 27.49 barns/electron
U=PE_Averievite x r_electron= 103.14 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Averievite is Not Radioactive

Averievite Classification

Dana Class:

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

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

(41.4.5)Dana Group

41.4.5.1 Stoiberite Cu5V2O10 P 2₁/n 2/m

41.4.5.2 Averievite ! Cu5(VO4)2O2·CuCl2 P 3 3

Strunz Class:

VII/B.07-15 VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O,OH, cations of medium size: Mg, Mn, Fe, Cu, Zn, Pseudomalachite group and related compounds

VII/B.07 - Stoiberite - Fingerite series

VII/B.07-05 Coparsite! Cu4O2[(As,V)O4]Cl Pbcm 2/m 2/m 2/m

VII/B.07-10 Stoiberite Cu5V2O10 P 2₁/n 2/m

VII/B.07-15 Averievite Cu5(VO4)2O2·CuCl2 P 3 3

VII/B.07-20 Fingerite Cu11(VO4)6O2 P1 1

VII/B.07-30 Urusovite! Cu[AlAsO5] P 2₁/c 2/m

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 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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

Averievite

Cu5(VO4)2O2·CuCl2
Dana No: 41.4.5.2 Strunz No: VII/B.07-15
Locality:

Notes: