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Zemannite Mineral Data

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General Zemannite Information

Help on Chemical  Formula: Chemical Formula: Mg0.5[Zn++Fe+++(TeO3)3]•4.5(H2O)
Help on Composition: Composition: Molecular Weight = 741.25 gm
   Magnesium   1.64 %  Mg    2.72 % MgO
   Zinc        8.82 %  Zn   10.98 % ZnO
   Iron        7.53 %  Fe   10.77 % Fe2O3
   Tellurium  51.64 %  Te   64.59 % TeO2
   Hydrogen    1.22 %  H    10.94 % H2O
   Oxygen     29.14 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg0.5ZnFe3+(TeO3)3•4.5(H2O)
Help on Environment: Environment: Secondary mineal assoiated with other tellurium oxysalts.
Help on IMA Status: IMA Status: Approved IMA 1969
Help on Locality: Locality: Moctezuma mine ("La Bambolla"), Moctezuma, Sonora Mexico. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Josef Zemann (1923-), Austrian mineralogist, University of Vienna, who studied tellurium oxysalts.
Help on Name Pronunciation: Name Pronunciation: Zemannite + Pronunciation Say ZEMANNITE
Help on Synonym: Synonym: ICSD 79849
  PDF 31-1310

Zemannite Image

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Comments: Root beer-colored zemannite hexagonal prisms.
Location: Moctezuma mine, Sonora, Mexico. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Zemannite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.8119
Help on Cell Dimensions: Cell Dimensions: a = 9.41, c = 7.64, Z = 2; V = 585.87 Den(Calc)= 4.20
Help on Crystal System: Crystal System: Hexagonal - Dipyramidal H-M Symbol (6/m) Space Group: P 63/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.15(1), 2.778(0.9), 4.07(0.8),

Physical Properties of Zemannite

Help on Cleavage: Cleavage: None
Help on Color: Color: Light brown, Dark brown.
Help on Density: Density: 4.05
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Hexagonal - Six-sided crystal shape in cross-section or habit.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Luster: Luster: Vitreous - Adamantine

Optical Properties of Zemannite

Help on Dichroism (e): Dichroism (e): reddish brown.
Help on Dichroism (w): Dichroism (w): yellowish brown.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.018 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.053 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2119,KPDmeas= 0.2198,KC= 0.2237
Ncalc = 1.91 - 1.94
Help on Optical Data: Optical Data: Uniaxial (+), w=1.85, e=1.93, bire=0.0800.

Calculated Properties of Zemannite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.66 gm/cc
note: Specific Gravity of Zemannite =4.05 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEZemannite = 182.48 barns/electron
U=PEZemannite x rElectron Density= 668.00 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Zemannite is Not Radioactive

Zemannite Classification

Help on  Dana Class: Dana Class: (34)Selenites - Tellurites - Sulfites
  (34.03)Dana Type
  (34.03.02)Zemannite Group Zemannite Mg0.5[ZnFe(TeO3)3]•4.5(H2O) P 63/m 6/m Kinichilite Mg0.5[MnFe(TeO3)3]•4.5(H2O) P 63/m 6/m Keystoneite Mg0.5[NiFe(TeO3)3]•4.5(H2O) P 63/m 6/m
Help on  Strunz Class: Strunz Class: 04.JM.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.J - Arsenites, Antimonites, Bismuthites, Sulfites,
  04.JM -Tellurites without additional anions, with H2O
04.JM.05 Keystoneite Mg0.5[NiFe(TeO3)3]•4.5(H2O) P 63/m 6/m
04.JM.05 Kinichilite Mg0.5[MnFe(TeO3)3]•4.5(H2O) P 63/m 6/m
04.JM.05 Zemannite Mg0.5[ZnFe(TeO3)3]•4.5(H2O) P 63/m 6/m

Other Zemannite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Zemannite :
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: 04.JM.05





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