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Kuranakhite

A valid IMA mineral species
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About KuranakhiteHide

Formula:
PbMn4+Te6+O6
Colour:
Pale brown to nearly black
Lustre:
Vitreous
Hardness:
4 - 5
Specific Gravity:
6.72
Crystal System:
Orthorhombic
Name:
After the type locality.
This page provides mineralogical data about Kuranakhite.


Unique IdentifiersHide

Mindat ID:
2292
Long-form identifier:
mindat:1:1:2292:3
GUID
(UUID V4):
fe9213e7-9079-4f0d-9bf6-e62ff4f0ca54

IMA Classification of KuranakhiteHide

Classification of KuranakhiteHide

4.DM.25

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
M : With large (+- medium-sized) cations; unclassified
Dana 7th ed.:
33.2.1.1
33.2.1.1

33 : SELENATES AND TELLURATES
2 : (AB)m(XO6)·xH2O, where x can equal zero
28.4.15

28 : Selenites, Selenates, Tellurites, and Tellurates
4 : Tellurates

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
KkhIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of KuranakhiteHide

Vitreous
Transparency:
Translucent
Colour:
Pale brown to nearly black
Streak:
Brown
Hardness:
4 - 5 on Mohs scale
Hardness:
VHN100=228 - 441 - Vickers
Tenacity:
Brittle
Density:
6.72(2) g/cm3 (Measured)    6.66 g/cm3 (Calculated)

Optical Data of KuranakhiteHide

Type:
Biaxial (+/-)
RI values:
nα = 1.952 - 1.960 nβ = 1.980 nγ = 2.002 - 2.010
Birefringence:
Weak; in rose tints.
Max Birefringence:
δ = 0.050
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Anisotropism:
Distinct, bright blue to brown
Bireflectance:
Weak in air; distinct in oil, with rose tints
Reflectivity:
WavelengthR
460nm24.4%
540nm24.0%
580nm24.5%
660nm23.0%
800nm21.6%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 24.5%.
Colour in reflected light:
Light gray with bluish tint
Internal Reflections:
None

Chemistry of KuranakhiteHide

Mindat Formula:
PbMn4+Te6+O6

Crystallography of KuranakhiteHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 5.11(1) Å, b = 8.91(1) Å, c = 5.32(1) Å
Ratio:
a:b:c = 0.574 : 1 : 0.597
Unit Cell V:
242.22 ų (Calculated from Unit Cell)
Z:
2
Morphology:
As tiny grains to 0.25mm
Comment:
Space group may be C

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.40 Å(100)
2.558 Å(60)
2.050 Å(50)
1.851 Å(50)
1.596 Å(40)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
47e : [Vanadates, chromates, manganates]
47h : [Near-surface oxidized, dehydrated minerals]
Geological Setting:
Gold quartz deposits

Type Occurrence of KuranakhiteHide

General Appearance of Type Material:
Grains generally 2-4 um.
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 76494.
Geological Setting of Type Material:
In the oxidation zone of a gold-quartz deposit.
Associated Minerals at Type Locality:
Reference:
Yablokova, S.V., Dubakina, L.S., Dmitrik, A.L., Sokolova, G.V. (1975) Kuranakhite, a new supergene tellurium mineral. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 104: 310-313.

Synonyms of KuranakhiteHide

Other Language Names for KuranakhiteHide

Related Minerals - Strunz-mindat GroupingHide

4.DM.BahariyaiteKMnO4Orth. mmm (2/m 2/m 2/m) : Pnma
4.DM.05Rankamaite(Na,K)3(Ta,Nb,Al)11(O,OH)31Orth. mmm (2/m 2/m 2/m) : Cmmm
4.DM.05Sosedkoite(K,Na)5Al2(Ta,Nb)22O60Orth.
4.DM.15Cesplumtantite(Cs,Na)2(Pb,Sb3+)3Ta8O24Tet.
4.DM.20EyseliteFe3+Ge4+3O7(OH)Orth.
4.DM.30GelosaiteBiMo6+(2-5x)Mo5+6xO7(OH) · H2O Mon. 2/m : P21/m
4.DM.30MambertiiteBiMo5+2.80O8(OH)Tric. 1 : P1
4.DM.35EkebergiteThFeNb2O8Mon. 2/m : P2/b
4.DM.45RiesiteTiO2Mon. 2/m : P2/b
4.DM.50SardignaiteBiMo2O7(OH) · 2H2OMon. 2/m : P21/m
4.DM.55Tewite(K1.50.5)(Te1.25W0.250.5)W5O19Orth. mmm (2/m 2/m 2/m) : Pban
4.DM.60WumuiteKAl0.33W2.67O9Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm
4.DM.60KingsgateiteZrMo6+2O7(OH)2 · 2H2OTet. 4mm : I41cd

Other InformationHide

Notes:
Liberates chlorine when reacted with concentrated HCl. Does not react with standard etch reagents KOH, FeCl3, HgCl2, dilute HCl, dilute HNO3, but dissolves when heated with concentrated HCl or
aqua regia.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for KuranakhiteHide

References for KuranakhiteHide

Localities for KuranakhiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Canada
 
  • Ontario
    • Timiskaming District
      • Bannockburn Township
Harris et al. (1973) +1 other reference
China
 
  • Shaanxi
    • Shangluo
      • Luonan County
Xinchun Zhou et al. (1997)
Mexico
 
  • Sonora
    • Moctezuma Municipality
Panczner (1987)
Russia
 
  • Bashkortostan
Rakhimov et al. (2022)
    • Uchalinsky District
      • Nurali complex (Nurali massif)
Rakhimov et al. (2022)
  • Sakha
    • Aldan
Pekov (1998) +1 other reference
Kondratieva et al. (2021)
Mills et al. (2010) +1 other reference
  • Sverdlovsk Oblast
    • Serovsky District
Kasatkin et al. (2023)
USA
 
  • California
    • San Bernardino County
      • Silver Lake Mining District
        • Soda Mountains
          • Baker
Marty et al. (2010) +1 other reference
Collected by and in the collection of ...
Collected by and in the collection of ...
    • Tuolumne County
      • Coulterville Mining District
        • Peñon Blanco Peak
Mike Scott S106030 from Cureton.
  • Utah
    • Utah County
      • East Tintic Mining District
XRD analyzed by Dr. Rob Bowell.
 
矿物 and/or 产地  
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