Kupcikite Mineral Data

Kupcikite Mineral Data

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General Kupcikite Information

Chemical Formula:

Cu3.4Fe0.6Bi5S10

Composition:

Molecular Weight = 1,615.03 gm

Cadmium 0.14 % Cd

Iron 2.07 % Fe

Copper 13.18 % Cu

Silver 0.07 % Ag

Bismuth 64.44 % Bi

Antimony 0.08 % Sb

Lead 0.13 % Pb

Sulfur 19.89 % S

______

100.00 %

Empirical Formula:

Fe²⁺_0.6Cu_3.35Bi_4.98Cd_0.02Sb_0.01Pb_0.01Ag_0.01S_10.02

Environment:

Found in a scheelite deposit in quartz gangue. (cuprobismutite series; structure)

IMA Status:

Approved IMA 2003 (Dana # Added)

Locality:

Felbertal, Austria. Link to MinDat.org Location Data.

Name Origin:

Named for Vladimir Kupcik (1934-1990), professor at the University of Bratislava and Gottingen in recognition of his contributions to the crystal chemistry of sulfosalts.

Synonym:

IMA2001-017

Kupcikite Image

Images:

Kupcikite Cuprobismutite

Comments: Backscattered electron image of kupc?kite (ku) replacing cuprobismutite (cu); both phases are in turn replaced by bsimuthinite derivative (bd79-92).
Location: Felbertal, Austria. Scale: Scale bar 100 µ-m.
© Canadian Mineralogist

Kupcikite Crystallography

Axial Ratios:

a:b:c =4.4784:1:3.291

Cell Dimensions:

a = 17.512, b = 3.9103, c = 12.869, Z = 2; beta = 108.56° V = 835.40 Den(Calc)= 6.42

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.128(1)(112), 3.071(0.7)(312), 3.596(0.7)(401),2.683(0.48)(113), 3.239(0.44), 3.123(0.4)(204), 6.028(0.4)(201),

Crystal Structure:

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Topa D , Makovicky E , Balic-Zunic T , Paar W H , The Canadian Mineralogist , 41 (2003) p.1155-1166, Kupcikite, Cu3.4Fe0.6Bi5S10, a new Cu-Bi sulfosalt from, Felbertal, Austria, and its crystal structure, Locality: Felbertal, Austria

Physical Properties of Kupcikite

Cleavage:

None

Color:

Gray.

Diaphaniety:

Opaque

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Intergrown Crystals - Occurs as intergrown crystalline aggregates

Hardness:

3.5 - Copper Penny

Luster:

Metallic

Optical Properties of Kupcikite

RL Anisotrophism:

Moderate in air, strong in oil.

RL Bireflectance:

Perceptible in air, moderate in oil.

RL Color:

Grayish white with no internal reflections.

RL Pleochroism:

Weak in air, white with bluish tints, enhanced in oil.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Kupcikite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	33.50	40.66
420 nm	33.47	40.21
440 nm	33.48	40.27
460 nm	33.48	40.29
470 nm	33.55	40.56
480 nm	33.50	40.60
500 nm	33.48	40.79
520 nm	33.68	40.96
540 nm	33.90	41.06
546 nm	33.92	41.14
560 nm	34.05	41.34
580 nm	34.15	41.28
589 nm	34.16	41.35
600 nm	34.18	41.28
620 nm	34.32	41.27
640 nm	34.26	41.42
650 nm	34.20	41.32
660 nm	34.11	41.10
680 nm	34.02	40.92
700 nm	34.00	40.94

**Calculated Relative Intensity Colors of Kupcikite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	240%	270%
R₁
R₂

Calculated Properties of Kupcikite

Electron Density:

r_electron=5.48 gm/cc
note: r_Kupcikite=6.42 gm/cc.

Fermion Index

Fermion Index = 0.00256
Boson Index = 0.99744

Photoelectric:

PE_Kupcikite=1,226.65 barns/electron
U=PE_Kupcikite x r_electron=6,720.99 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Kupcikite is Not Radioactive

Kupcikite Classification

Dana Class:

3.8.2.2 (3)Sulfides - Sulfosalts

(3.8)where 1 < z/y <2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(3.8.2)Cuprobismutite Series

3.8.2.1 Cuprobismutite Cu10Bi12S23 C 2/m 2/m

3.8.2.2 Kupcikite ! Cu3.4Fe0.6Bi5S10 C 2/m 2/m

Strunz Class:

II/E.04-25 II - Sulfides and sulphosalts

II/E - Sulfosalts (S : As,Sb,Bi = x), Sulfosalts with predominant Iron and Copper x = 2.0

II/E.04 - Chalcostibite - Hodrushite series

II/E.04-10 Chalcostibite CuSbS2 Pnam 2/m 2/m 2/m

II/E.04-20 Emplectite CuBiS2 Pnam 2/m 2/m 2/m

II/E.04-25 Kupcikite Cu3.4Fe0.6Bi5S10 C 2/m 2/m

II/E.04-30 Cuprobismutite Cu10Bi12S23 C 2/m 2/m

II/E.04-40 Hodrushite Cu8Bi12S22 A2/m 2/m

Other Kupcikite Information

References:

NAME( CanMin, v 41, p 1155) PHYS. PROP.(CanMin, v 41, p 1155) OPTIC PROP.(CanMin, v 41, p 1155)

See Also:

Links to other databases for Kupcikite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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Print or Cut-and-Paste your Kupcikite Specimen Label here :

Kupcikite

Cu3.4Fe0.6Bi5S10
Dana No: 3.8.2.2 Strunz No: II/E.04-25
Locality:

Notes: