Mineralogy Database

Metavoltine Mineral Data

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General Metavoltine Information

Help on Chemical  Formula: Chemical Formula: K4Na4(Fe++,Zn)Fe+++6(SO4)12O2•20(H2O)
Help on Composition: Composition: Molecular Weight = 2,189.12 gm
   Potassium   7.14 %  K     8.61 % K2O
   Sodium      4.20 %  Na    5.66 % Na2O
   Zinc        1.49 %  Zn    1.86 % ZnO
   Iron       16.58 %  Fe    1.64 % FeO / 21.88 % Fe2O3
   Hydrogen    1.84 %  H    16.46 % H2O
   Sulfur     17.58 %  S    43.89 % SO3
   Oxygen     51.16 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K4Na4Fe2+0.5Zn0.5Fe3+6(SO4)12O2�20(H2O)
Help on Environment: Environment: Volcanic exhalations.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1883
Help on Locality: Locality: From Vesuvius and Cape Miseno, near Naples, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the Greek for "with" and voltine, because is was found associated with voltaite at the original locality.
Help on Name Pronunciation: Name Pronunciation: Metavoltine + Pronunciation Say METAVOLTINE
Help on Synonym: Synonym: ICSD 8270
  PDF 29-1043

Metavoltine Image

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  Metavoltine   Alunogen

Comments: Yellow metavoltine with white alunogen.
Location: Carola Mine, Freital, near Dresden, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Metavoltine Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.89523
Help on Cell Dimensions: Cell Dimensions: a = 9.545, c = 18.09, Z = 1; V = 1,427.32 Den(Calc)= 2.55
Help on Crystal System: Crystal System: Trigonal - Rhombohedral H-M Symbol ( 3) Space Group: P 3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.08(1), 18.2(0.8), 2.018(0.4),

Physical Properties of Metavoltine

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Greenish brown, Yellow brown, Orange brown, Lemon.
Help on Density: Density: 2.5
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Habit: Habit: Scaly - Morphology like fish scales.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: Non-Fluorescent.
Help on Luster: Luster: Resinous
Help on Streak: Streak: brownish yellow

Optical Properties of Metavoltine

Help on Dichroism (e): Dichroism (e): light yellow or pale greenish yellow.
Help on Dichroism (w): Dichroism (w): dark yellowish brown or dark yellowish brown.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.03 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2291,KPDmeas= 0.2337,KC= 0.2362
Ncalc = 1.59 - 1.6
Help on Optical Data: Optical Data: Uniaxial (-), e=1.573-1.581, w=1.588-1.595, bire=0.0140-0.0150.

Calculated Properties of Metavoltine

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.50 gm/cc
note: Specific Gravity of Metavoltine =2.50 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0057029967
Boson Index = 0.9942970033
Help on Photoelectric: Photoelectric: PEMetavoltine = 7.42 barns/electron
U=PEMetavoltine x relectron= 18.58 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 103.23 (Gamma Ray American Petroleum Institute Units)
Concentration of Metavoltine per GRapi unit = 0.97 (%)

Estimated Radioactivity from Metavoltine - barely detectable


Metavoltine Classification

Help on  Dana Class: Dana Class: (29)Hydrated Acid and Sulfates
  (29.04)where (A+)2 Bn (XO4)p � x(H2O)
  (29.04.06)Dana Group Metavoltine K4Na4(Fe,Zn)Fe6(SO4)12O2•20(H2O) P 3 3
Help on  Strunz Class: Strunz Class: 07.DF.35 07 - SULFATES (SELENATES, TELLURATES)
  07.D - Sulfates (selenates, etc.) with additional anions, with H2O
  07.DF -With large and medium-sized cations
07.DF.35 Metavoltine K4Na4(Fe,Zn)Fe6(SO4)12O2•20(H2O) P 3 3

Other Metavoltine Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8:Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Metavoltine :
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

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Dana No: Strunz No: 07.DF.35





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