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Kafehydrocyanite

Big Photo

Medvezhii Log Au Deposit, Ol'khovskoye ore field, Sayan Mts, Tuva Republic, Eastern-Siberian Region, Russia
© 2008, J. Weissman

Formula:
K
 
4
[Fe(CN)
 
6
] · H
 
2
O
System:TetragonalColour:Yellow
Hardness:2 - 2½


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.

Classification of Kafehydrocyanite

IMA status:Published without Approval 1974
Strunz 8th edition ID:9/A.02-40
Nickel-Strunz 10th (pending) edition ID:10.AD.10

10 : ORGANIC COMPOUNDS
A : Salts of organic acids
D : Cyanates
Dana 8th edition ID:50.2.5.1

50 : ORGANIC COMPOUNDS
2 : Mellitates, Citrates, Cyanates, Acetates and Formates
Hey's CIM Ref.:30.2

30 : Thiocyanates
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Physical Properties of Kafehydrocyanite

Colour:Yellow
Hardness (Mohs):2 - 2½

Crystallography of Kafehydrocyanite

Crystal System:Tetragonal

Optical Data of Kafehydrocyanite

Type:Uniaxial (+)
RI values: nω = 1.577 nε = 1.584
Maximum Birefringence:δ = 0.007

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate

Chemical Properties of Kafehydrocyanite

Formula:
K
 
4
[Fe(CN)
 
6
] · H
 
2
O
Essential elements:C, Fe, H, K, N, O
All elements listed in formula:C, Fe, H, K, N, O

Relationship of Kafehydrocyanite to other Species

Related Minerals - Nickel-Strunz Grouping):
10.AD.05Julienite
Na
 
2
[Co(SCN)
 
4
] · 8H
 
2
O
Related Minerals - Hey's Index Grouping:
30.1Julienite
Na
 
2
[Co(SCN)
 
4
] · 8H
 
2
O

Other Names for Kafehydrocyanite

German names:
Kafehydrocyanit
Spanish names:
Kafehydrocyanita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Kafehydrocyanite

Reference List:American Mineralogist (1974): 59: 209.

Internet Links for Kafehydrocyanite

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    Localities for Kafehydrocyanite

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Russia
     
    • Eastern-Siberian Region
      • Transbaikalia (Zabaykalye)
        • Yeniseisk Autonomous Oblast'
          • Novosibirsk
            • Kuznetsk Alatau Range
      • Tuva Republic
        • Sayan Mts
          • Ol'khovskoye ore field
    		No reference listed
    • Urals Region
      • Orenburgskaya Oblast'
        • Mednogorsk District
          • Sakmara Zone
            • Blyava
    Mineral and/or Locality
    Google
     
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