Kafehydrocyanite Mineral Data

General Kafehydrocyanite Information

Chemical Formula: K4Fe++(CN)6•3(H2O) 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 %  Empirical Formula: K₄Fe²⁺(CN)₆•3(H₂O) Environment: Natural origin in doubt. As stalactites in mine workings. IMA Status: Not Approved IMA 1973 Locality: Medvizhii Log gold mine, Olkhovsk ore field, Sayan, Russia. Link to MinDat.org Location Data. Name Origin: Named for it's composition. Name Pronunciation: Kafehydrocyanite + Pronunciation Synonym: ICSD 23767   PDF 25-1354  

Kafehydrocyanite Image

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Kafehydrocyanite Crystallography

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

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Taylor J C , Mueller M H , Hitterman R L , Acta Crystallographica, Section A , 26 (1970) p.559-567, A neutron diffraction study of ferroelectric KFCT, K4Fe(CN)6*3D2O, above the, Curie temperature, Locality: synthetic

 

Physical Properties of Kafehydrocyanite

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

Optical Properties of Kafehydrocyanite

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

Calculated Properties of Kafehydrocyanite

Electron Density: Bulk Density (Electron Density)=1.88 gm/cc
note: Specific Gravity of Kafehydrocyanite =1.89 gm/cc.
Fermion Index: Fermion Index = 0.2
Boson Index = 0.8 Photoelectric: PE_{Kafehydrocyanite} = 7.61 barns/electron
U=PE_{Kafehydrocyanite} x r_electron= 14.30 barns/cc.
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

Specimen Size Weight/Volume (Sphere) *	Calculated Activity Becquerels (Bq)	Calculated Activity Curies (Ci)	Estimated Activity GR(api)	Estimated Exposure (mRem**)/hr 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

Dana Class: 50.02.05.01 (50)Salts of Organic Acids   (50.02)(Mellitates, Citrates, Cyanates, and Acetates)   (50.02.05)Dana Group  

50.02.05.01 Kafehydrocyanite* K4Fe(CN)6•3(H2O) I 4₁/a 4/m

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

References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) 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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