Kuranakhite Mineral Data

General Kuranakhite Information

Chemical Formula:

PbMn++++Te++++++O6

Composition:

Molecular Weight = 485.73 gm

Manganese 11.31 % Mn 17.90 % MnO₂

Tellurium 26.27 % Te 32.86 % TeO₂

Lead 42.66 % Pb 45.95 % PbO

Oxygen 19.76 % O

______ ______

100.00 % 96.71 % = TOTAL OXIDE

Empirical Formula:

PbMn⁴⁺TeO₆

Environment:

In quartz-limonite ores (Supergene Alteration Zone).

IMA Status:

Approved IMA 1975

Locality:

Kuranakh gold deposit, southern Yakutia, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Kuranakhite + Pronunciation

Kuranakhite Image

Images:

Kuranakhite

Comments: Reddish-brown kuranakhite on matrix.
Location: Moctezuma, Mun. de Moctezuma, Sonora, Mexico. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Kuranakhite Crystallography

Axial Ratios:

a:b:c =0.573:1:0.5955

Cell Dimensions:

a = 5.1, b = 8.9, c = 5.3, Z = 2; V = 240.57 Den(Calc)= 6.71

Crystal System:

OrthorhombicSpace Group: Unk

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

By Intensity(I/I_o): 3.4(1), 2.558(0.6), 2.05(0.5),

Physical Properties of Kuranakhite

Color:

Brown, Black.

Density:

6.71

Fracture:

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

Hardness:

4-5 - Fluorite-Apatite

Luster:

Vitreous (Glassy)

Streak:

brown

Optical Properties of Kuranakhite

Gladstone-Dale:

CI meas= 0.263 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.263 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1456,KPDmeas= 0.1456,KC= 0.1977
Ncalc = 2.33

Optical Data:

Biaxial (?), a=1.952, g=2.002, bire=0.0500

RL Anisotrophism:

Distinct, blue to brown.

RL Bireflectance:

Weak, distinct in oil, with rose tints.

RL Color:

Light gray with a bluish tine with no internal reflections.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Kuranakhite in Air**
λ	R	∑ R(λ)
470 nm	24.40
546 nm	24.00
589 nm	24.50
650 nm	23.00

**Calculated Relative Intensity Colors of Kuranakhite in Air**
Relative Intensity	0%	40%	80%	100%	120%	160%	200%	240%	280%	320%	360%	370%
R

Calculated Properties of Kuranakhite

Electron Density:

Bulk Density (Electron Density)=5.72 gm/cc
note: Specific Gravity of Kuranakhite =6.71 gm/cc.

Fermion Index:

Fermion Index = 0.11
Boson Index = 0.89

Photoelectric:

PE_Kuranakhite= 866.16 barns/electron
U=PE_Kuranakhite x rElectron Density=4,953.62 barns/cc.

Radioactivity:

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

Kuranakhite Classification

Dana Class:

33.02.01.01 (33)Selenates and Tellurates

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

(33.02.01)Dana Group

33.02.01.01 Kuranakhite PbMnTeO6 Unk Ortho

Strunz Class:

04.DM.25 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.D - Metal:Oxygen = 1:2 and similar

04.DM -With large (± medium-sized) cations; unclassified

04.DM.25 Kuranakhite PbMnTeO6 Unk Ortho

Other Kuranakhite Information

References:

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

See Also:

Links to other databases for Kuranakhite :
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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Print or Cut-and-Paste your Kuranakhite Specimen Label here :

Kuranakhite

PbMn++++Te++++++O6
Dana No: 33.02.01.01 Strunz No: 04.DM.25
Locality:

Notes: