Mineralogy Database

Kafehydrocyanite Mineral Data

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General Kafehydrocyanite Information

Help on Chemical  Formula: Chemical Formula: K4Fe++(CN)6•3(H2O)
Help on Composition: Composition: Molecular Weight = 422.39 gm
   Potassium  37.03 %  K
   Iron       13.22 %  Fe
   Hydrogen    1.43 %  H
   Carbon     17.06 %  C
   Nitrogen   19.90 %  N
   Oxygen     11.36 %  O
             100.00 % 
Help on Empirical Formula: Empirical Formula: K4Fe2+(CN)6•3(H2O)
Help on Environment: Environment: Natural origin in doubt. As stalactites in mine workings.
Help on IMA Status: IMA Status: Not Approved IMA 1973
Help on Locality: Locality: Medvizhii Log gold mine, Olkhovsk ore field, Sayan, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for it's composition.
Help on Name Pronunciation: Name Pronunciation: Kafehydrocyanite + Pronunciation Say KAFEHYDROCYANITE
Help on Synonym: Synonym: ICSD 23767
  PDF 25-1354

Kafehydrocyanite Image

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Comments: Micro platy crystal of kafehydrocyanite.
Location: Medvezhii Log, East Sayan Mountains, Krasnoyarsk Territory, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Kafehydrocyanite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:3.58952
Help on Cell Dimensions: Cell Dimensions: a = 9.394, c = 33.72, Z = 8; V = 2,975.70 Den(Calc)= 1.89
Help on Crystal System: Crystal System: Tetragonal - Dipyramidal H-M Symbol (4/m) Space Group: I 41/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.93(1), 2.21(0.8), 4.8(0.8),

Physical Properties of Kafehydrocyanite

Help on Cleavage: Cleavage: {001} Good
Help on Color: Color: Yellow, Pale yellow green.
Help on Density: Density: 1.98
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail

Optical Properties of Kafehydrocyanite

Help on Optical Data: Optical Data: Uniaxial (+), w=1.577, e=1.584, bire=0.0070.

Calculated Properties of Kafehydrocyanite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.88 gm/cc
note: Specific Gravity of Kafehydrocyanite =1.89 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.2
Boson Index = 0.8
Help on Photoelectric: Photoelectric: PEKafehydrocyanite = 7.61 barns/electron
U=PEKafehydrocyanite x relectron= 14.30 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 531.21 (Gamma Ray American Petroleum Institute Units)
Concentration of Kafehydrocyanite per GRapi unit =1,882.49 (PPM)

Estimated Radioactivity from Kafehydrocyanite - mild
Curies (Ci)
If Held in Hand
For One Hour
1000 gm / 10.03 cm 11,219 3.03E-07 531.21 0.17
100 gm / 4.66 cm 1,122 3.03E-08 53.12 0.02
10 gm / 2.16 cm 112 3.03E-09 5.31 0.00
1 gm / 1.00 cm 11 3.03E-10 0.53 0.00
0.1 gm / 4.66 mm 1 3.03E-11 0.05 0.00
0.01 gm / 2.16 mm 0 3.03E-12 0.01 0.00
0.001 gm / 1.00 mm 0 3.03E-13 0.00 0.00

Weight of pure Kafehydrocyanite in grams (gm) and Calculated Diameter of a Sphere with a Density of 1.89 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem

Kafehydrocyanite Classification

Help on  Dana Class: Dana Class: (50)Salts of Organic Acids
  (50.02)(Mellitates, Citrates, Cyanates, and Acetates)
  (50.02.05)Dana Group Kafehydrocyanite* K4Fe(CN)6•3(H2O) I 41/a 4/m
Help on  Strunz Class: Strunz Class: 10.AD.10 10 - ORGANIC COMPOUNDS
  10.A - Salts of Organic Acids
  10.AD -Cyanates
10.AD.10 Kafehydrocyanite* K4Fe(CN)6•3(H2O) I 41/a 4/m

Other Kafehydrocyanite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Kafehydrocyanite :
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 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 10.AD.10





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