Kafehydrocyanite
Valid as an unnamed mineral
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About Kafehydrocyanite
Formula:
K4[Fe(CN)6] · H2O
Colour:
Yellow
Hardness:
2 - 2½
Crystal System:
Tetragonal
First Recorded Locality:
Potassium hexacyanoferrate(II) hydrate - a complex salt.
Originally reported from Medvezhii Log Au Deposit, Ol'khovskoye ore field, Sayan Mts, Tuva Republic, Eastern-Siberian Region, Russia.
Possibly originated due to cyanide leaching. Doubtful as a natural mineral.
See also: UM2009-//-CN:FeHKZn
Originally reported from Medvezhii Log Au Deposit, Ol'khovskoye ore field, Sayan Mts, Tuva Republic, Eastern-Siberian Region, Russia.
Possibly originated due to cyanide leaching. Doubtful as a natural mineral.
See also: UM2009-//-CN:FeHKZn
Unique Identifiers
Mindat ID:
2130
Long-form identifier:
mindat:1:1:2130:8
GUID
(UUID V4):
(UUID V4):
5de682f7-28c6-461e-9889-6c21b6e5bac7
IMA Classification of Kafehydrocyanite
IMA status notes:
Published without approval, Unnamed (probably valid)
Classification of Kafehydrocyanite
10.AD.10
10 : ORGANIC COMPOUNDS
A : Salts of organic acids
D : Cyanates
10 : ORGANIC COMPOUNDS
A : Salts of organic acids
D : Cyanates
50.2.5.1
50 : ORGANIC COMPOUNDS
2 : Mellitates, Citrates, Cyanates, Acetates and Formates
50 : ORGANIC COMPOUNDS
2 : Mellitates, Citrates, Cyanates, Acetates and Formates
30.2
30 : Thiocyanates
30 : Thiocyanates
Physical Properties of Kafehydrocyanite
Colour:
Yellow
Hardness:
2 - 2½ on Mohs scale
Optical Data of Kafehydrocyanite
Type:
Uniaxial (+)
RI values:
nω = 1.577 nε = 1.584
Max Birefringence:
δ = 0.007
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Chemistry of Kafehydrocyanite
Mindat Formula:
K4[Fe(CN)6] · H2O
Crystallography of Kafehydrocyanite
Crystal System:
Tetragonal
First Recorded Occurrence of Kafehydrocyanite
Other Language Names for Kafehydrocyanite
German:Kafehydrocyanit
Spanish:Kafehydrocyanita
Related Minerals - Strunz-mindat Grouping
| 10.AD.05 | Julienite | Na2[Co(SCN)4] · 8H2O |
Other Information
Health Risks:
When heated with mineral acids, hexacyanoferrates will liberate prussic acid, HCN (gaseous), which is extremely toxic even at low levels. Contact with acids, therefore, should be prevented at all events.
Internet Links for Kafehydrocyanite
mindat.org URL:
https://www.mindat.org/min-2130.html
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References for Kafehydrocyanite
Localities for Kafehydrocyanite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Russia | |
| Pekov (1998) |
| Pekov (1998) | |
| Pekov (1998) |
| American Mineralogist 59:209 +1 other reference |
Medvezhii Log Au deposit, Ol'khovskoye ore field, Tuva, Russia