Maikainite Mineral Data

Maikainite Mineral Data

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General Maikainite Information

Chemical Formula:

Cu20(Fe,Cu)6Mo2Ge6S32

Composition:

Molecular Weight = 3,296.63 gm

Vanadium 0.12 % V

Zinc 0.56 % Zn

Gallium 0.15 % Ga

Iron 6.30 % Fe

Copper 42.23 % Cu

Germanium 10.79 % Ge

Molybdenum 5.18 % Mo

Arsenic 2.27 % As

Tungsten 1.23 % W

Sulfur 31.16 % S

______

100.00 %

Empirical Formula:

Cu_21.91Fe²⁺_3.72Zn_0.28Mo_1.78W_0.22V²⁺_0.08Ge_4.9AsGa_0.07S_32.04

Environment:

In a gold-bearing massive-sulfide base-metal deposit.

IMA Status:

Approved IMA 2003 (Dana # Added)

Locality:

Maikain deposit, Kazakhstan and (2) Tsumeb deposit, Namibia. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

IMA1992-038

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Maikainite Crystallography

Cell Dimensions:

a = 10.64, Z = 1; V = 1,204.55 Den(Calc)= 4.54

Crystal System:

Isometric - HextetrahedralH-M Symbol (4 3m) Space Group: P 43n

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

By Intensity(I/I_o): 1.331(1)(800), 3.07(1)(222), 1.884(0.8)(440),1.603(0.4)(622), 1.22(0.2)(662), 2.66(0.2)(400), 1.19(0.1)(840),

Physical Properties of Maikainite

Cleavage:

None

Color:

Yellow.

Diaphaniety:

Opaque

Habit:

Inclusions - Generally found as inclusions in other minerals.

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

4 - Fluorite

Luster:

Metallic

Optical Properties of Maikainite

RL Anisotrophism:

None.

RL Bireflectance:

None.

RL Color:

Bright yellow to grayish white with no internal reflections.

RL Pleochroism:

None.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Maikainite in Air**
λ	R	∑ R(λ)
470 nm	23.70
546 nm	25.50
589 nm	25.70
650 nm	25.60

**Calculated Relative Intensity Colors of Maikainite in Air**
Relative Intensity	0%	40%	80%	100%	120%	160%	200%	240%	280%	320%	360%	370%
R

Calculated Properties of Maikainite

Electron Density:

r_electron=4.24 gm/cc
note: r_Maikainite=4.54 gm/cc.

Fermion Index

Fermion Index = 0.02726
Boson Index = 0.97274

Photoelectric:

PE_Maikainite= 54.06 barns/electron
U=PE_Maikainite x r_electron= 228.99 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Maikainite is Not Radioactive

Maikainite Classification

Dana Class:

2.9.4.3 (2)Sulfides - Including Selenides and Tellurides

(2.9)where Am Bn Xp, with (m+n):p=1:1

(2.9.4)Germanite Group

2.9.4.1 Renierite (Cu,Zn)11(Ge,As)2Fe4S16 P 4₂c- 4 2m

2.9.4.2 Germanite Cu26Fe4Ge4S32 P 43n 4 3m

2.9.4.3 Maikainite ! Cu20(Fe,Cu)6Mo2Ge6S32 P 43n 4 3m

2.9.4.4 Ovamboite! Cu20(Fe,Cu,Zn)6W2Ge6S32 P 43n 4 3m

Strunz Class:

II/C.10-50* II - Sulfides and sulphosalts

II/C - Sulfides with metal: sulfur, selenium and tellurium = 1:1

II/C.10 - Stannite group, Germanite series

II/C.10-10 Renierite (Cu,Zn)11(Ge,As)2Fe4S16 P 4₂c- 4 2m

II/C.10-15 Vinciennite Cu10Fe4Sn(As,Sb)S16 P 4₁22 4 2 2

II/C.10-20 Germanite Cu26Fe4Ge4S32 P 43n 4 3m

II/C.10-30 Nekrasovite Cu26V2(Sn,As,Sb)6S32 P 43n 4 3m

II/C.10-40 Colusite Cu12-13V(As,Sb,Sn,Ge)3S16 P 43n 4 3m

II/C.10-45 Stibiocolusite Cu13V(Sb,As,Sn)3S16 P 43n 4 3m

II/C.10-47 Germanocolusite Cu13V(Ge,As)3S16 P 43n 4 3m

II/C.10-50 Arsenosulvanite Cu3(As,V)S4 P 43m 4 3m

II/C.10-50* Maikainite Cu20(Fe,Cu)6Mo2Ge6S32 P 43n 4 3m

II/C.10-55 Ovamboite! Cu20(Fe,Cu,Zn)6W2Ge6S32 P 43n 4 3m

II/C.10-60 Sulvanite Cu3VS4 P 43m 4 3m

II/C.10-70 Polkovicite (Fe,Pb)3(Ge,Fe)1-xS4 F d3m 4/m 3 2/m

II/C.10-80 Morozeviczite (Pb,Fe)3Ge1-xS4 F d3m 4/m 3 2/m

Other Maikainite Information

References:

NAME( CanMin, 42:1247) PHYS. PROP.(CanMin, 42:1247) OPTIC PROP.(CanMin, 42:1247)

See Also:

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

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Maikainite

Cu20(Fe,Cu)6Mo2Ge6S32
Dana No: 2.9.4.3 Strunz No: II/C.10-50*
Locality:

Notes: