Alvanite Mineral Data

General Alvanite Information

Chemical Formula:

(Zn,Ni)Al4(VO3)2(OH)12•2(H2O)

Composition:

Molecular Weight = 609.64 gm

Aluminum 17.70 % Al 33.45 % Al₂O₃

Vanadium 16.71 % V 24.59 % V₂O₃

Zinc 8.04 % Zn 10.01 % ZnO

Nickel 2.41 % Ni 3.06 % NiO

Hydrogen 2.65 % H 23.64 % H₂O

Oxygen 52.49 % O

______ ______

100.00 % 94.75 % = TOTAL OXIDE

Empirical Formula:

Zn_0.75Ni_0.25Al₄(VO3)₂(OH)₁₂•2(H₂O)

Environment:

Oxidation zone of a vanadiferous clay-anthraxolite horizon.

IMA Status:

Approved IMA 1959

Locality:

Several mines of the Kurumsak and Balasauskandyk districts, northwestern Kara-Tau Mountains, Kazakhstan. Link to MinDat.org Location Data.

Name Origin:

Named for the ALuminum and VANadium in the composition.

Name Pronunciation:

Alvanite

Synonym:

ICSD 69459

PDF 13-386

Alvanite Crystallography

Axial Ratios:

a:b:c =3.4699:1:1.7305

Cell Dimensions:

a = 17.808, b = 5.132, c = 8.881, Z = 2; beta = 92.11° V = 811.09 Den(Calc)= 2.50

Crystal System:

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

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

By Intensity(I/I_o): 4.46(1), 8.91(0.9), 7.85(0.8),

Physical Properties of Alvanite

Cleavage:

{010} Perfect

Color:

Bluish green, Blue black, Black.

Density:

2.41 - 2.49, Average = 2.45

Hardness:

3-3.5 - Calcite-Copper Penny

Luster:

Vitreous (Glassy)

Streak:

gray

Optical Properties of Alvanite

Gladstone-Dale:

CI meas= -0.169 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.146 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2744,KPDmeas= 0.28,KC= 0.2394
Ncalc = 1.58 - 1.6

Optical Data:

Biaxial (-), a=1.658, g=1.714, bire=0.0560, 2V(Meas)=80-85.

Calculated Properties of Alvanite

Electron Density:

Bulk Density (Electron Density)=2.49 gm/cc
note: Specific Gravity of Alvanite =2.50 gm/cc.

Fermion Index:

Fermion Index = 0.0042439242
Boson Index = 0.9957560758

Photoelectric:

PE_Alvanite= 8.48 barns/electron
U=PE_Alvanite x rElectron Density= 21.12 barns/cc.

Radioactivity:

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

Alvanite Classification

Dana Class:

42.13.13.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.13)Dana Type

(42.13.13)Alvanite Group

42.13.13.01 Alvanite (Zn,Ni)Al4(VO3)2(OH)12•2(H2O) P 2₁/n 2/m

42.13.13.02 Ankinovichite! (Ni,Zn)Al4(VO3)2(OH)12(H2O)2.5 P 2₁/n 2/m

Strunz Class:

08.FE.05 08 - PHOSPHATES, ARSENATES, VANADATES

08.F - Polyphosphates, Polyarsenates, [4]-Polyvanadates

08.FE -Ino-[4]-vanadates

08.FE.05 Alvanite (Zn,Ni)Al4(VO3)2(OH)12•2(H2O) P 2₁/n 2/m

08.FE.05 Ankinovichite! (Ni,Zn)Al4(VO3)2(OH)12(H2O)2.5 P 2₁/n 2/m

Other Alvanite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Alvanite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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

Alvanite

(Zn,Ni)Al4(VO3)2(OH)12•2(H2O)
Dana No: 42.13.13.01 Strunz No: 08.FE.05
Locality:

Notes:

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