Leisingite Mineral Data

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General Leisingite Information

Chemical Formula:

Cu(Mg,Cu,Fe,Zn)2Te++++++O6•6(H2O)

Composition:

Molecular Weight = 481.14 gm

Magnesium 5.05 % Mg 8.38 % MgO

Zinc 2.72 % Zn 3.38 % ZnO

Iron 3.48 % Fe 4.48 % FeO

Copper 19.81 % Cu 14.87 % Cu₂O / 8.27 % CuO

Tellurium 26.52 % Te 33.17 % TeO₂

Hydrogen 2.51 % H 22.47 % H₂O

Oxygen 39.90 % O

______ ______

100.00 % 95.01 % = TOTAL OXIDE

Empirical Formula:

CuMgCu_0.5Fe²⁺_0.3Zn_0.2TeO₆•6(H₂O)

Environment:

From a secondary alteration zone.

IMA Status:

Approved IMA 1997 (Dana # Added)

Locality:

The dumps of the Centennial Eureka mine, Tintic District, Juab County, Utah, USA. Link to MinDat.org Location Data.

Name Origin:

For Mr. Joseph F. Leising (1949-), geologist and mineral collector of Reno, Nevada, USA.

Name Pronunciation:

Leisingite + Pronunciation

Synonym:

ICSD 76868

IMA1995-011

Leisingite Image

Images:

Leisingite

Comments: Very small yellow crystal of Leisingite on quartz.
Location: Centennial Eureka Mine, Tintic District, Juab Co., Utah, USA. Scale: Picture size 0.8 mm.
© Thomas Witzke / Abraxas-Verlag

Leisingite Crystallography

Axial Ratios:

a:c = 1:1.82714

Cell Dimensions:

a = 5.305, c = 9.693, Z = 1; V = 236.24 Den(Calc)= 3.38

Crystal System:

Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: P 31m

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

By Intensity(I/I_o): 9.7(1), 4.834(0.8), 2.556(0.7),2.326(0.7),

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Forms: ( 0 1 0) ( 1 0 0) ( 0 0 1)

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Crystal Structure:

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Margison S M , Grice J D , Groat L A , The Canadian Mineralogist , 35 (1997) p.759-763, The crystal structure of leisingite, (Cu,Mg,Zn)2(Mg,Fe)TeO6.6H2O

Physical Properties of Leisingite

Cleavage:

{001} Perfect

Color:

Yellow, Yellowish orange.

Density:

3.41

Diaphaneity:

Transparent to Translucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Habit:

Platy - Sheet forms (e.g. micas).

Hardness:

3-4 - Calcite-Fluorite

Luster:

Vitreous - Silky

Streak:

light yellow

Optical Properties of Leisingite

Gladstone-Dale:

CI meas= 0.088 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.08 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2047,KPDmeas= 0.2029,KC= 0.2224
Ncalc = 1.75 - 1.76

Optical Data:

Uniaxial (-), e=1.581, w=1.803, bire=0.2220.

Calculated Properties of Leisingite

Electron Density:

Bulk Density (Electron Density)=3.22 gm/cc
note: Specific Gravity of Leisingite =3.38 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Leisingite= 96.76 barns/electron
U=PE_Leisingite x rElectron Density= 311.74 barns/cc.

Radioactivity:

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

Leisingite Classification

Dana Class:

33.02.09.01 (33)Selenates and Tellurates

(33.02)as A+ (B++)m XO6 Zq · x(H2O) where x can equal 0

(33.02.09)Dana Group

33.02.09.01 Leisingite! Cu(Mg,Cu,Fe,Zn)2TeO6•6(H2O) P 31m 3 2/m

Strunz Class:

04.FL.65 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.F - Hydroxides (without V or U)

04.FL -Hydroxides with H2O ± (OH); sheets of edge-sharing octahedra

04.FL.65 Leisingite! Cu(Mg,Cu,Fe,Zn)2TeO6•6(H2O) P 31m 3 2/m

Other Leisingite Information

References:

NAME( MinRec, Vol 28, No. 3) PHYS. PROP.(Min.Mag.,Vol.60,p653-657,1996) OPTIC PROP.(MinRec, Vo. 28, No. 3)

See Also:

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

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

Leisingite

Cu(Mg,Cu,Fe,Zn)2Te++++++O6•6(H2O)
Dana No: 33.02.09.01 Strunz No: 04.FL.65
Locality:

Notes: