Denningite Mineral Data

Denningite Mineral Data +

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General Denningite Information

Chemical Formula:

(Mn,Zn)Te2O5

Composition:

Molecular Weight = 392.75 gm

Manganese 10.49 % Mn 13.55 % MnO

Zinc 4.16 % Zn 5.18 % ZnO

Tellurium 64.98 % Te 81.27 % TeO₂

Oxygen 20.37 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺_0.75Zn_0.25Te₂O₅

IMA Status:

Approved IMA 1962

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 73991

PDF 45-1368

Denningite Image

Images:

Denningite Tellurite

Comments: Vitreous colorless to very pale yellowish elongated crystals denningite with yellow tellurite.
Location: Bambolla Mine, Moctezuma, Mun. de Moctezuma, Sonora, Mexico. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Denningite Crystallography

Axial Ratios:

a:c = 1:1.47845

Cell Dimensions:

a = 8.82, c = 13.04, Z = 8; V = 1,014.41 Den(Calc)= 5.14

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4₁/nbc

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

By Intensity(I/I_o): 4.42(1), 3.38(0.8), 3.12(0.7),

Crystal Structure:

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Miletich R , Mineralogy and Petrology , 48 (1993) p.129-145, Copper-substituted manganese-denningites,, Mn(Mn1-xCux)(Te2O5)2(0<=x<=1): synthesis and crystal chemistry, Locality: synthetic, Sample: x = 0.0

View Additional jPOWD Structure files for Denningite
[1] [2] [3] [4]

Physical Properties of Denningite

Cleavage:

[001] Perfect

Color:

Colorless, Light green.

Density:

5.05

Diaphaniety:

Transparent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Hardness:

4 - Fluorite

Luster:

Adamantine

Streak:

white

Optical Properties of Denningite

Gladstone-Dale:

CI meas= 0.056 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.073 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1839,KPDmeas= 0.1871,KC= 0.1982

Optical Data:

Uniaxial (+), w=1.89, e=2, bire=0.1100.

Calculated Properties of Denningite

Electron Density:

r_electron=4.38 gm/cc
note: r_Denningite=5.05 gm/cc.

Fermion Index

Fermion Index = 0.05372
Boson Index = 0.94628

Photoelectric:

PE_Denningite= 235.24 barns/electron
U=PE_Denningite x r_electron=1,029.92 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Denningite is Not Radioactive

Denningite Classification

Dana Class:

34.4.1.1 (34)Selenites - Tellurites - Sulfites

(34.4)Dana Type

(34.4.1)Dana Group

34.4.1.1 Denningite (Mn,Zn)Te2O5 P 4₁/nbc 4/m 2/m 2/m

Strunz Class:

IV/K.12-20 IV - Oxides

IV/K - Tellurides with [Te2O5]2- groups

IV/K.12 - Rayite - Mackayite series

IV/K.12-10 Rajite CuTe2O5 P 2₁/c 2/m

IV/K.12-20 Denningite (Mn,Zn)Te2O5 P 4₁/nbc 4/m 2/m 2/m

IV/K.12-30 Mackayite FeTe2O5(OH) I 4₁/acd 4/m 2/m 2/m

Other Denningite Information

References:

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

See Also:

Links to other databases for Denningite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Denningite

(Mn,Zn)Te2O5
Dana No: 34.4.1.1 Strunz No: IV/K.12-20
Locality:

Notes: