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Cuprokalininite

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Formula:
CuCr2S4
System:
Isometric
Colour:
Black
Hardness:
4½ - 5
Name:
Copper analog of kalininite
Spinel-type structure (sulphospinel, thiospinel) -> see Thiospinel Group.

Classification of Cuprokalininite

Approved 2010
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
2.10.1.20

2 : SULFIDES
10 : AmBnXp, with (m+n):p = 3:4
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http://www.mindat.org/min-40142.html
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First Recorded Occurrence of Cuprokalininite

General Appearance of First Recorded Material:
Euhedral octahedral or cubo-octahedral microcrystals up to 0.2 mm in size.
Place of Conservation of First Recorded Material:
Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, catalog no. 3886/1-3
Geological Setting of First Recorded Material:
In a Cr-V-bearing quartz-diopside metamorphic rock.

Physical Properties of Cuprokalininite

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:
4.16 g/cm3 (Calculated)

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 Data:
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%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 34.30%.
Colour in reflected light:
Pale cream
Internal Reflections:
None observed

Chemical Properties of Cuprokalininite

Formula:
CuCr2S4
Essential elements:
All elements listed in formula:
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:
(Cu1.000Fe0.011Zn0.002)(Cr1.513V0.495)S3.979
Common Impurities:
V,Fe,Zn

Relationship of Cuprokalininite to other Species

Other Members of Group:
BornhardtiteCo2+Co23+Se4
CadmoinditeCdIn2S4
CarrolliteCu(Co,Ni)2S4
Cuproiridsite(Cu,Fe)Ir2S4
Cuprorhodsite(Cu,Fe)Rh2S4
DaubréeliteFe2+Cr23+S4
Ferrorhodsite(Fe,Cu)(Rh,Ir,Pt)2S4
FletcheriteCu(Ni,Co)2S4
Florensovite(Cu,Zn)Cr1.5Sb0.5S4
GreigiteFe2+Fe23+S4
InditeFeIn2S4
KalininiteZnCr2S4
LinnaeiteCo2+Co23+S4
MalaniteCu(Pt3+,Ir3+)2S4
PolydymiteNi2+Ni23+S4
SiegeniteCoNi2S4
TrüstedtiteNi3Se4
TyrrelliteCu(Co3+,Ni3+)2Se4
ViolariteFe2+Ni23+S4
Xingzhongite(Pb,Cu,Fe)(Ir,Pt,Rh)2S4
2.DA.05BornhardtiteCo2+Co23+Se4
2.DA.05CarrolliteCu(Co,Ni)2S4
2.DA.05Cuproiridsite(Cu,Fe)Ir2S4
2.DA.05Cuprorhodsite(Cu,Fe)Rh2S4
2.DA.05DaubréeliteFe2+Cr23+S4
2.DA.05FletcheriteCu(Ni,Co)2S4
2.DA.05Florensovite(Cu,Zn)Cr1.5Sb0.5S4
2.DA.05GreigiteFe2+Fe23+S4
2.DA.05InditeFeIn2S4
2.DA.05KalininiteZnCr2S4
2.DA.05LinnaeiteCo2+Co23+S4
2.DA.05MalaniteCu(Pt3+,Ir3+)2S4
2.DA.05PolydymiteNi2+Ni23+S4
2.DA.05SiegeniteCoNi2S4
2.DA.05TrüstedtiteNi3Se4
2.DA.05TyrrelliteCu(Co3+,Ni3+)2Se4
2.DA.05ViolariteFe2+Ni23+S4
2.DA.05Xingzhongite(Pb,Cu,Fe)(Ir,Pt,Rh)2S4
2.DA.05Ferrorhodsite(Fe,Cu)(Rh,Ir,Pt)2S4
2.DA.05CadmoinditeCdIn2S4
2.DA.10RhodostanniteCu2FeSn3S8
2.DA.10ToyohaiteAg2FeSn3S8
2.DA.15BrezinaiteCr3S4
2.DA.15Heideite(Fe,Cr)1.15(Ti,Fe)2S4
2.DA.20InaglyiteCu3Pb(Ir,Pt)8S16
2.DA.20KonderiteCu3Pb(Rh,Pt,Ir)8S16
2.DA.25Kingstonite(Rh,Ir,Pt)3S4

Other Names for Cuprokalininite

Name in Other Languages:

Other Information

Other Information:
Insoluble in HCl.
Health Risks:
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

Localities for Cuprokalininite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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)
Mineral and/or Locality  
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