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 % Al2 O3
Vanadium 16.71 % V 24.59 % V2 O3
Zinc 8.04 % Zn 10.01 % ZnO
Nickel 2.41 % Ni 3.06 % NiO
Hydrogen 2.65 % H 23.64 % H2 O
Oxygen 52.49 % O
______ ______
100.00 % 94.75 % = TOTAL OXIDE
Empirical Formula:
Zn0.75 Ni0.25 Al4 (VO3)2 (OH)12 •2(H2 O)
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
X Ray Diffraction:
By Intensity(I/Io ): 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:
PEAlvanite = 8.48 barns/electronU=PEAlvanite x r Electron 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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Alvanite
(Zn,Ni)Al4(VO3)2(OH)12•2(H2O)
Dana No: 42.13.13.01 Strunz No: 08.FE.05
Locality:
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