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Ilinskite

Big Photo

Great Fissure (Main Fracture) eruption, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia
© Thomas Witzke

Formula:
(Na,K)Cu
 
5
[O
 
2
|Cl
 
3
|(SeO
 
3
)
 
2
]
System:OrthorhombicColour:emerald green
Lustre:VitreousHardness:1½
Name:For G. A. Ilinskiy (1927-1996) of St. Petersburg University.
This page provides mineralogical data about Ilinskite.

Classification of Ilinskite

IMA status:Approved 1996
Strunz 8th edition ID:4/K.05-60
Nickel-Strunz 10th (pending) edition ID:4.JG.20

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
G : Selenites with additional anions, without H2O
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Type Occurrence of Ilinskite

Co-type Localities:Second scoria cone, Northern Breakthrough (North Breach), Great Fissure (Main Fracture) eruption, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia
Glavnoye fumarole, Southern Breakthrough (South Breach), Great Fissure (Main Fracture) eruption, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia

Physical Properties of Ilinskite

Lustre:Vitreous
Colour:emerald green
Streak:light green
Hardness (Mohs):1½
Cleavage:Perfect

Crystallography of Ilinskite

Crystal System:Orthorhombic

Optical Data of Ilinskite

Type:Biaxial (-)
RI values: nα = 1.845 nβ = 1.965 - 1.968 nγ = 1.975
2V:Measured: 20° , Calculated: 24° to 30°
Maximum Birefringence:δ = 0.130

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

Chemical Properties of Ilinskite

Formula:
(Na,K)Cu
 
5
[O
 
2
|Cl
 
3
|(SeO
 
3
)
 
2
]
Essential elements:Cl, Cu, Na, O, Se
All elements listed in formula:Cl, Cu, K, Na, O, Se

Relationship of Ilinskite to other Species

Related Minerals - Nickel-Strunz Grouping):
4.JG.05Georgbokiite
Cu
 
5
[O
 
2
|Cl
 
2
|(SeO
 
3
)
 
2
]
4.JG.05Parageorgbokiite
Cu
 
5
[O
 
2
|Cl
 
2
|(SeO
 
3
)
 
2
]
4.JG.10Chloromenite
Cu
 
9
[O
 
2
|Cl
 
6
|(SeO
 
3
)
 
4
]
4.JG.15Sophiite
Zn
 
2
[Cl
 
2
|SeO
 
3
]
4.JG.25Francisite
Cu
 
3
Bi(SeO
 
3
)
 
2
O
 
2
Cl
4.JG.30Derriksite
Cu
 
4
UO
 
2
(SeO
 
3
)
 
2
(OH)
 
6
·H
 
2
O
4.JG.35Burnsite
KCdCu
2+
7
[O
 
2
|Cl
 
9
|(SeO
 
3
)
 
2
]
4.JG.40Allochalcoselite
Cu
+
 
PbCu
2+
5
[O
 
2
|Cl
 
5
|(SeO
 
3
)
 
2
]

Other Names for Ilinskite

Synonyms:
IMA1996-027
German names:
Ilinskit
Spanish names:
Ilinskita

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 Ilinskite

Reference List:Mineralogical Record: 29: 472.

Transactions of the Russian Academy of Sciences/Earth Science Sections: 353A(3): 352-355.

Doklady Akademii Nauk SSSR (Russia) (1997): 353(5): 641-644.

Internet Links for Ilinskite

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    Localities for Ilinskite

    (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
     
    • Far-Eastern Region
      • Kamchatka Oblast'
        • Tolbachik volcano
          • Great Fissure (Main Fracture) eruption
            • Northern Breakthrough (North Breach)
    		DAN,(1997) 353, n5, 641-644
            • Southern Breakthrough (South Breach)
    Mineral and/or Locality
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