Zemannite Mineral Data

General Zemannite Information

Chemical Formula:

Mg0.5[Zn++Fe+++(TeO3)3]•4.5(H2O)

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

Empirical Formula:

Mg_0.5ZnFe³⁺(TeO₃)₃•4.5(H₂O)

Environment:

Secondary mineal assoiated with other tellurium oxysalts.

IMA Status:

Approved IMA 1969

Locality:

Moctezuma mine ("La Bambolla"), Moctezuma, Sonora Mexico. Link to MinDat.org Location Data.

Name Origin:

Named for Josef Zemann (1923-), Austrian mineralogist, University of Vienna, who studied tellurium oxysalts.

Name Pronunciation:

Zemannite + Pronunciation

Synonym:

ICSD 79849

PDF 31-1310

Zemannite Image

Images:

Zemannite

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

Zemannite Crystallography

Axial Ratios:

a:c = 1:0.8119

Cell Dimensions:

a = 9.41, c = 7.64, Z = 2; V = 585.87 Den(Calc)= 4.20

Crystal System:

Hexagonal - DipyramidalH-M Symbol (6/m) Space Group: P 6₃/m

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

By Intensity(I/I_o): 8.15(1), 2.778(0.9), 4.07(0.8),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Miletich F , European Journal of Mineralogy , 7 (1995) p.509-523, Crystal chemistry of the microporous tellurite minerals

View Additional jPOWD Structure files for Zemannite
[1]

Physical Properties of Zemannite

Cleavage:

None

Color:

Light brown, Dark brown.

Density:

4.05

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Hexagonal - Six-sided crystal shape in cross-section or habit.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Luster:

Vitreous - Adamantine

Optical Properties of Zemannite

Dichroism (e):

reddish brown.

Dichroism (w):

yellowish brown.

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

Optical Data:

Uniaxial (+), w=1.85, e=1.93, bire=0.0800.

Calculated Properties of Zemannite

Electron Density:

Bulk Density (Electron Density)=3.66 gm/cc
note: Specific Gravity of Zemannite =4.05 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_Zemannite= 182.48 barns/electron
U=PE_Zemannite x rElectron Density= 668.00 barns/cc.

Radioactivity:

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

Zemannite Classification

Dana Class:

34.03.02.01 (34)Selenites - Tellurites - Sulfites

(34.03)Dana Type

(34.03.02)Zemannite Group

34.03.02.01 Zemannite Mg0.5[ZnFe(TeO3)3]•4.5(H2O) P 6₃/m 6/m

34.03.02.02 Kinichilite Mg0.5[MnFe(TeO3)3]•4.5(H2O) P 6₃/m 6/m

34.03.02.03 Keystoneite Mg0.5[NiFe(TeO3)3]•4.5(H2O) P 6₃/m 6/m

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

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

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

Search for Zemannite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Zemannite :

A Bijoux Google Search for Zemannite
Adam's Minerals Google Search for Zemannite
Cape Minerals Google Search for Zemannite
Dakota Matrix Minerals Google Search for Zemannite
Excalibur Mineral Corp. Google Search for Zemannite
Exceptional Minerals Google Search for Zemannite
John Betts Fine Minerals Search for Zemannite
McDougall Minerals Google Search for Zemannite
Mineral News Website Link
Rock and Mineral Shows Google Search for Zemannite
Weinrich Minerals, Inc. Google Search for Zemannite

Ask about Zemannite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Zemannite

Mg0.5[Zn++Fe+++(TeO3)3]•4.5(H2O)
Dana No: 34.03.02.01 Strunz No: 04.JM.05
Locality:

Notes: