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

Images:

Kafehydrocyanite

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

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

$Help on X Ray Diffraction:$ 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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Ask about Kafehydrocyanite here :
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Print or Cut-and-Paste your Kafehydrocyanite Specimen Label here :

Kafehydrocyanite

K4Fe++(CN)6•3(H2O)
Dana No: 50.02.05.01 Strunz No: 10.AD.10
Locality:

Notes: