Mineralogy Database

Nabokoite Mineral Data

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General Nabokoite Information

Help on Chemical  Formula: Chemical Formula: Cu++7Te++++O4(SO4)5•KCl
Help on Composition: Composition: Molecular Weight = 1,191.29 gm
   Potassium   3.28 %  K     3.95 % K2O
   Copper     37.34 %  Cu   46.74 % CuO
   Tellurium  10.71 %  Te   13.40 % TeO2
   Sulfur     13.46 %  S    33.60 % SO3
   Chlorine    2.98 %  Cl    2.98 % Cl
                -   %   Cl   -0.67 % -O=Cl2   
   Oxygen     32.23 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu7TeO4(SO4)5KCl
Help on Environment: Environment: Sublimate on porous basalt near a fumarole. Needs further study.
Help on IMA Status: IMA Status: Approved IMA 1987
Help on Locality: Locality: Great Clefted Tolbachik eruption, Kamchatka, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Sof'ya I. Naboko (1901-), Russian volcanologist.
Help on Name Pronunciation: Name Pronunciation: Nabokoite + Pronunciation Say NABOKOITE
Help on Synonym: Synonym: ICSD 68186
  PDF 42-1337

Nabokoite Image

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Comments: Brown thin tabular plates, co-type material.
Location: Tolbachik Volcano, Kamchatka, Russia. Scale: See Image.
© Rruff Database

Nabokoite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.08536
Help on Cell Dimensions: Cell Dimensions: a = 9.84, c = 20.52, Z = 4; V = 1,986.86 Den(Calc)= 3.98
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: P 4/ncc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 10.35(1), 2.439(0.7), 3.421(0.6),

Physical Properties of Nabokoite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Yellow, Yellow brown.
Help on Density: Density: 4.18
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: yellowish brown

Optical Properties of Nabokoite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.065 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1948,KPDmeas= 0.1855,KC= 0.183
Ncalc = 1.73 - 1.77
Help on Optical Data: Optical Data: Uniaxial (-), e=1.773, w=1.778, bire=0.0050.

Calculated Properties of Nabokoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.95 gm/cc
note: Specific Gravity of Nabokoite =4.18 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0097262073
Boson Index = 0.9902737927
Help on Photoelectric: Photoelectric: PENabokoite = 52.80 barns/electron
U=PENabokoite x relectron= 208.60 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 44.74 (Gamma Ray American Petroleum Institute Units)
Concentration of Nabokoite per GRapi unit = 2.24 (%)

Estimated Radioactivity from Nabokoite - barely detectable


Nabokoite Classification

Help on  Dana Class: Dana Class: (30)Anhydrous Sulfates Containing Hydroxyl or Halogen
  (30.01)where (A B)m (XO4)p Zq where m:p>2:1
  (30.01.17)Dana Group Nabokoite Cu7TeO4(SO4)5•KCl P 4/ncc 4/m 2/m 2/m Atlasovite Cu6FeBiO4(SO4)5•KCl P 4/ncc 4/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 07.BC.20 07 - SULFATES (SELENATES, TELLURATES)
  07.B - Sulfates (selenates, etc.) with Additional Anions, without H2O
  07.BC -With medium-sized and large cations
07.BC.20 Atlasovite Cu6FeBiO4(SO4)5•KCl P 4/ncc 4/m 2/m 2/m
07.BC.20 Nabokoite Cu7TeO4(SO4)5•KCl P 4/ncc 4/m 2/m 2/m

Other Nabokoite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.73,p929,1988) OPTIC PROP.(Am.Min.,Vol.73,p929,1988)
Help on See Also: See Also: Links to other databases for Nabokoite :
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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Dana No: Strunz No: 07.BC.20





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