Mineralogy Database

Polkanovite Mineral Data

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General Polkanovite Information

Help on Chemical  Formula: Chemical Formula: Rh12As7
Help on Composition: Composition: Molecular Weight = 1,759.32 gm
   Arsenic  29.81 %  As
   Rhodium  70.19 %  Rh
           100.00 % 
Help on Empirical Formula: Empirical Formula: Rh12As7
Help on Environment: Environment: Residual mineral in a placer deposit. Intergrown with isoferropatinum and tulameenite within native ruthenium.
Help on IMA Status: IMA Status: Approved IMA 1998 (Dana # Added)
Help on Locality: Locality: A small unnamed placer deposit in the upper Miass River, South Urals, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Yuri Aleksandrovich Polkanov (b. 1935), Academician, Institute of Mineral Resources, Academy of Technical Sciences of Ukraine, known for his studies of the mineralogy an d ore deposits of the Crimean Peninsul
Help on Name Pronunciation: Name Pronunciation: Polkanovite + Pronunciation Say POLKANOVITE
Help on Synonym: Synonym: ICSD 61404
  PDF 50-1691

Polkanovite Image

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image


Comments: BSE image of isoferroplatinum (IFP) and polkanovite (PLK) inclusions in native osmium (Os, IR, Ru).
Location: Heavy minera concentrates, Miass River, Ural, Russia. Scale: See Image.
© Diederik Visser

Polkanovite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.39097
Help on Cell Dimensions: Cell Dimensions: a = 9.31, c = 3.64, Z = 1; V = 273.23 Den(Calc)= 10.69
Help on Crystal System: Crystal System: Hexagonal - Dipyramidal H-M Symbol (6/m) Space Group: P 63m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.755(1), 1.852(0.9), 1.549(0.8),

Physical Properties of Polkanovite

Help on Color: Color: Gray.
Help on Density: Density: 10.22
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Luster: Luster: Metallic

Optical Properties of Polkanovite

Help on RL Anisotrophism: RL Anisotrophism: Distinct.
Help on RL Color: RL Color: White with cream-red tint.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Polkanovite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 470 nm   43.50   44.50 
 535 nm   43.00   44.00 
 591 nm   44.00   45.00 
 658 nm   45.50   46.50 
Calculated Relative Intensity Colors of Polkanovite in Air
   0%   30%   60%   90% 100% 120% 150% 180% 210%

Calculated Properties of Polkanovite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=9.37 gm/cc
note: Specific Gravity of Polkanovite =10.7 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0
Boson Index = 1
Help on Photoelectric: Photoelectric: PEPolkanovite = 178.55 barns/electron
U=PEPolkanovite x rElectron Density=1,672.97 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Polkanovite is Not Radioactive

Polkanovite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.04)where Am Bn Xp, with (m+n):p=2:1
  (02.04.20)Dana Group Polkanovite! Rh12As7 P 63m 6/m
Help on  Strunz Class: Strunz Class: 02.AC.30 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.A - Simple Sulfides, Selenides, etc
  02.AC -Alloys of metalloids with PGE
02.AC.30 Polkanovite! Rh12As7 P 63m 6/m

Other Polkanovite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Eur. J. Min.,Vol.10,1998) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Polkanovite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 02.AC.30





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