Kafehydrocyanite Mineral Data

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.

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),

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:

r_electron=1.88 gm/cc
note: r_{Kafehydrocyanite}=1.89 gm/cc.

Fermion Index

Fermion Index = 0.203
Boson Index = 0.797

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)

**Estimated Radioactivity from Kafehydrocyanite** - mild
Specimen Size Weight/Volume (Sphere) *	Calculated Activity Bequerols (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:

50.2.5.1 (50)Salts of Organic Acids

(50.2)(Mellitates, Citrates, Cyanates, and Acetates)

(50.2.5)Dana Group

50.2.5.1 Kafehydrocyanite * K4Fe(CN)6·3(H2O) I 4₁/a 4/m

Strunz Class:

IX/A.02-40 IX - Organic compunds

IX/A - Salts from organic acids. Other organic salts, a.o. mellates and citrates.

IX/A.02 - Mellite - Abelsonite (?) series

IX/A.02-03 Dashkovaite! Mg(HCOO)2·2(H2O) P 2₁/c 2/m

IX/A.02-05 Formicaite! Ca(HCOO)2 P 4₁2₁2 4 2 2

IX/A.02-10 Mellite Al2[C6(COO)6]·16(H2O) P 4₁22,P 4₃22 4 2 2

IX/A.02-16 Hoganite! Cu(CH3COO)2·H2O C 2/c 2/m

IX/A.02-18 Paceite! CaCu(CH3COO)4·6(H2O) I 4/m 4/m

IX/A.02-20 Calclacite Ca[Cl2/CH3COO]·10(H2O) P 2₁/a 2/m

IX/A.02-30 Earlandite Ca3(C6H5O7)·4(H2O) Unk Mono

IX/A.02-40 Kafehydrocyanite K4Fe(CN)6·3(H2O) I 4₁/a 4/m

IX/A.02-50 Julienite* Na2Co(SCN)4·8(H2O) P 4₁/n 4/m

IX/A.02-60 Abelsonite NiC31H32N4 P1 or P1 Tri

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 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 -École des Mines de Paris

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Print or Cut-and-Paste your Kafehydrocyanite Specimen Label here :

Kafehydrocyanite

K4Fe++(CN)6·3(H2O)
Dana No: 50.2.5.1 Strunz No: IX/A.02-40
Locality:

Notes: