Kuranakhite Mineral Data

Kuranakhite Mineral Data +

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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.

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

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:

r_electron=5.72 gm/cc
note: r_Kuranakhite=6.71 gm/cc.

Fermion Index

Fermion Index = 0.11535
Boson Index = 0.88465

Photoelectric:

PE_Kuranakhite= 866.16 barns/electron
U=PE_Kuranakhite x r_electron=4,953.61 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Kuranakhite is Not Radioactive

Kuranakhite Classification

Dana Class:

33.2.1.1 (33)Selenates and Tellurates

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

(33.2.1)Dana Group

33.2.1.1 Kuranakhite PbMnTeO6 Unk Ortho

Strunz Class:

IV/D.15-50 IV - Oxides

IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds)

IV/D.15 - Brookite - Kuranakhite series

IV/D.15-10 Brookite TiO2 Pcab 2/m 2/m 2/m

IV/D.15-20 Srilankite (Ti,Zr)O2 P bcn 2/m 2/m 2/m

IV/D.15-25 Carmichaelite! (Ti,Cr,Fe)[O2-x(OH)x],x~0.5 P 2₁/c 2/m

IV/D.15-30 Tellurite TeO2 P bca 2/m 2/m 2/m

IV/D.15-40 Scrutinyite PbO2 P bcn 2/m 2/m 2/m

IV/D.15-50 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 -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 -École des Mines de Paris

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Kuranakhite

PbMn++++Te++++++O6
Dana No: 33.2.1.1 Strunz No: IV/D.15-50
Locality:

Notes: