SUPPORT US. If is important to you, click here to donate to our Fall 2019 fundraiser!
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsBooks & Magazines
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryMineral Photography


This page is currently not sponsored. Click here to sponsor this page.
Hide all sections | Show all sections

About KafehydrocyaniteHide

K4[Fe(CN)6] · H2O
2 - 2½
Crystal System:
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

Classification of KafehydrocyaniteHide

Published without approval, Unnamed (probably valid)

A : Salts of organic acids
D : Cyanates

2 : Mellitates, Citrates, Cyanates, Acetates and Formates

30 : Thiocyanates

Physical Properties of KafehydrocyaniteHide

2 - 2½ on Mohs scale

Optical Data of KafehydrocyaniteHide

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.
Surface Relief:

Chemical Properties of KafehydrocyaniteHide

K4[Fe(CN)6] · H2O

Crystallography of KafehydrocyaniteHide

Crystal System:

First Recorded Occurrence of KafehydrocyaniteHide

Other Language Names for KafehydrocyaniteHide

Related Minerals - Nickel-Strunz GroupingHide

10.AD.05JulieniteNa2[Co(SCN)4] · 8H2OMon. 2/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

30.1JulieniteNa2[Co(SCN)4] · 8H2OMon. 2/m

Other InformationHide

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.

References for KafehydrocyaniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Povarennykh AS and Rusakova LD: Geol.Zhurn.(1973) 33/2, 24-30
American Mineralogist (1974): 59: 209.

Internet Links for KafehydrocyaniteHide

Localities for KafehydrocyaniteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Orenburg Oblast
    • Mednogorsk District
      • Sakmara Zone
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
  • Tuva
    • Sayan Mts
      • Eastern Sayan
        • Ol'khovskoye ore field
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; American Mineralogist 59:209
  • Zabaykalsky Krai
    • Yeniseisk Autonomous Oblast
      • Kuznetsk Alatau Range
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Mineral and/or Locality is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © and the Hudson Institute of Mineralogy 1993-2019, except where stated. Most political location boundaries are © OpenStreetMap contributors. relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: October 16, 2019 06:40:46 Page generated: September 29, 2019 09:40:39
Go to top of page