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Cuprokalininite

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Formula:
CuCr
 
2
S
 
4
System:IsometricColour:Black
Hardness:4½ - 5
Member of:Linnaeite Group > Thiospinel Group
Name:Copper analog of kalininite


Spinel-type structure (sulphospinel, thiospinel) -> see Thiospinel Group.

Classification of Cuprokalininite

IMA status:Approved 2010
Nickel-Strunz 10th (pending) edition ID:2.DA.05

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
D : Metal Sulfides, M: S = 3 :4 and 2:3
A : M:S = 3:4
Dana 8th edition ID:2.10.1.20

2 : SULFIDES
10 : AmBnXp, with (m+n):p = 3:4
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Type Occurrence of Cuprokalininite

Type Locality:Pereval Marble Quarry, Slyudyanka (Sludyanka), Lake Baikal area, Irkutskaya Oblast', Prebaikalia (Pribaikal'e), Eastern-Siberian Region, Russia
General Appearance of Type Material:Euhedral octahedral or cubo-octahedral microcrystals up to 0.2 mm in size.
Place of Conservation of Type Material:Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, catalog no. 3886/1-3
Geological Setting of type material:In a Cr-V-bearing quartz-diopside metamorphic rock.
Associated Minerals at type locality:
TremoliteQuartzMica GroupCalciteDiopside
KosmochlorGoldmaniteUvaroviteDraviteChromdravite
KarelianiteEskolaiteTitanitePyriteAlbite-Anorthite Series

Physical Properties of Cuprokalininite

Lustre:Sub-Metallic
Comment:Close to metallic
Colour:Black
Comment:with a weak dark bronze tint
Streak:Black
Hardness (Mohs):4½ - 5
Hardness (Vickers):VHN20=356 - 458 kg/mm2
Comment:Mohs hardness was estimated from VHN.
Tenacity:Very brittle
Cleavage:None Observed
Fracture:Irregular/Uneven
Density (calculated):4.16 g/cm3

Crystallography of Cuprokalininite

Crystal System:Isometric
Class (H-M):m3m (4/m 3 2/m) - Hexoctahedral
Space Group:Fd3m
Cell Parameters:a = 9.814(2) Å
Unit Cell Volume:V 945.2 ų
Z:8
Morphology:Dominant forms are {111} and {100} with distinct growth steps.
Twinning:Polysynthetic twins on {111} are typical. Occasionally, simple twinning by the spinel law is identified.
X-Ray Powder Diffraction:
d-spacingIntensity
3.44 (6)
2.94 (10)
2.44 (6)
1.884 (9)
1.731 (10)
1.133 (6)
1.098 (6)
1.030 (6)
1.002 (10)

Optical Data of Cuprokalininite

Type:Isotropic
Reflectivity:
400nmR=34.30%
420nmR=34.10%
440nmR=33.90%
460nmR=33.70%
480nmR=33.50%
500nmR=33.20%
520nmR=33.00%
540nmR=32.80%
560nmR=32.50%
580nmR=32.20%
600nmR=31.90%
620nmR=31.60%
640nmR=31.20%
660nmR=30.90%
680nmR=30.60%
700nmR=30.40%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 34.30%.
Colour in reflected light:Pale cream
Internal Reflections:None observed

Chemical Properties of Cuprokalininite

Formula:
CuCr
 
2
S
 
4
Simplified for copy/paste:CuCr2S4
Essential elements:Cr, Cu, S
All elements listed in formula:Cr, Cu, S
Analytical Data:Average of 22 electron-microprobe analyses. Sample from the type locality.
Cu (21.51)
Fe (0.21)
Zn (0.04)
Cr (26.63)
V (8.53)
As (0.00)
Sb (0.00)
S (43.17)
Total (100.09)
Empirical Formula:
(Cu
 
1.000
Fe
 
0.011
Zn
 
0.002
)(Cr
 
1.513
V
 
0.495
)S
 
3.979
Common Impurities:V,Fe,Zn

Relationship of Cuprokalininite to other Species

Member of:Linnaeite Group > Thiospinel Group
Other Members of Group:

- +
Bornhardtite
Co
2+
 
Co
3+
2
Se
 
4
Cadmoindite
CdIn
 
2
S
 
4
Carrollite
Cu(Co,Ni)
 
2
S
 
4
Cuproiridsite
(Cu,Fe)Ir
 
2
S
 
4
Cuprorhodsite
(Cu,Fe)Rh
 
2
S
 
4
Daubréelite
Fe
2+
 
Cr
3+
2
S
 
4
Ferrorhodsite
(Fe,Cu)(Rh,Ir,Pt)
 
2
S
 
4
Fletcherite
Cu(Ni,Co)
 
2
S
 
4
Florensovite
(Cu,Zn)Cr
 
1.5
Sb
 
0.5
S
 
4
Greigite
Fe
2+
 
Fe
3+
2
S
 
4
Indite
FeIn
 
2
S
 
4
Kalininite
ZnCr
 
2
S
 
4
Linnaeite
Co
2+
 
Co
3+
2
S
 
4
Malanite
Cu(Pt
3+
 
,Ir
3+
 
)
 
2
S
 
4
Polydymite
Ni
2+
 
Ni
3+
2
S
 
4
Siegenite
CoNi
 
2
S
 
4
-NiCo
 
2
S
 
4
Trüstedtite
Ni
 
3
Se
 
4
Tyrrellite
Cu(Co
3+
 
,Ni
3+
 
)
 
2
Se
 
4
Violarite
Fe
2+
 
Ni
3+
2
S
 
4
Xingzhongite
(Pb,Cu,Fe)(Ir,Pt,Rh)
 
2
S
 
4
Related Minerals - Nickel-Strunz Grouping):

- +
2.DA.05Bornhardtite
Co
2+
 
Co
3+
2
Se
 
4
2.DA.05Carrollite
Cu(Co,Ni)
 
2
S
 
4
2.DA.05Cuproiridsite
(Cu,Fe)Ir
 
2
S
 
4
2.DA.05Cuprorhodsite
(Cu,Fe)Rh
 
2
S
 
4
2.DA.05Daubréelite
Fe
2+
 
Cr
3+
2
S
 
4
2.DA.05Fletcherite
Cu(Ni,Co)
 
2
S
 
4
2.DA.05Florensovite
(Cu,Zn)Cr
 
1.5
Sb
 
0.5
S
 
4
2.DA.05Greigite
Fe
2+
 
Fe
3+
2
S
 
4
2.DA.05Indite
FeIn
 
2
S
 
4
2.DA.05Kalininite
ZnCr
 
2
S
 
4
2.DA.05Linnaeite
Co
2+
 
Co
3+
2
S
 
4
2.DA.05Malanite
Cu(Pt
3+
 
,Ir
3+
 
)
 
2
S
 
4
2.DA.05Polydymite
Ni
2+
 
Ni
3+
2
S
 
4
2.DA.05Siegenite
CoNi
 
2
S
 
4
-NiCo
 
2
S
 
4
2.DA.05Trüstedtite
Ni
 
3
Se
 
4
2.DA.05Tyrrellite
Cu(Co
3+
 
,Ni
3+
 
)
 
2
Se
 
4
2.DA.05Violarite
Fe
2+
 
Ni
3+
2
S
 
4
2.DA.05Xingzhongite
(Pb,Cu,Fe)(Ir,Pt,Rh)
 
2
S
 
4
2.DA.05Ferrorhodsite
(Fe,Cu)(Rh,Ir,Pt)
 
2
S
 
4
2.DA.05Cadmoindite
CdIn
 
2
S
 
4
2.DA.10Rhodostannite
Cu
 
2
FeSn
 
3
S
 
8
2.DA.10Toyohaite
Ag
 
2
FeSn
 
3
S
 
8
2.DA.15Brezinaite
Cr
 
3
S
 
4
2.DA.15Heideite
(Fe,Cr)
 
1.15
(Ti,Fe)
 
2
S
 
4
2.DA.20Inaglyite
Cu
 
3
Pb(Ir,Pt)
 
8
S
 
16
2.DA.20Konderite
Cu
 
3
Pb(Rh,Pt,Ir)
 
8
S
 
16
2.DA.25Kingstonite
(Rh,Ir,Pt)
 
3
S
 
4

Other Names for Cuprokalininite

Synonyms:
IMA2010-008
Other Languages:

Other Information

Other Information:Insoluble in HCl.
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 Cuprokalininite

Reference List:

- +
Reznitsky, L.Z., et al. (2010): Cuprokalininite, IMA 2010-008. CNMNC Newsletter, June 2010, 578; Mineralogical Magazine 74, 577-579

Reznitsky, L.Z., Sklyarov, E.V., Ushchapovskaya, Z.F., Suvorova, L.F., Polekhovsky, Yu.S., Dzerzanovsky, P. & Barash, I.G. (2010): Cuprokalininite CuCr2S4 - the new sulfospinel from metamorphic rocks of Sludyanka Complex (South Baikal Region). Zapiski Rossiyskogo Mineralogicheskogo Obshchestva, 139(6), 39-49 (in Russian). English translation: (2011) Geology of Ore Deposits, 53, 758-766.

Internet Links for Cuprokalininite

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  • Raman and XRD data at RRUFF project
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  • Localities for Cuprokalininite

    The 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.
    (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
      • Prebaikalia (Pribaikal'e)
        • Irkutskaya Oblast'
          • Lake Baikal area
            • Slyudyanka (Sludyanka)
    CNMNC Newlsetter, June 2010, 578; Min. Mag. 74,577(2010)
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