Menshikovite Mineral Data

Menshikovite Mineral Data

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General Menshikovite Information

Chemical Formula:

Pd3Ni2As3

Composition:

Molecular Weight = 661.40 gm

Nickel 17.75 % Ni

Arsenic 33.98 % As

Palladium 48.27 % Pd

______

100.00 %

Empirical Formula:

Pd₃Ni₂As₃

Environment:

Associated with other PGM at the type locality.

IMA Status:

Approved IMA 2000 (Dana # Added)

Locality:

Lukkulaisvaara layered intrusion, Karelia, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Yurii P. Men'shikov (1934-) of the Geological Institute of the Kola Science Center, Apatity, Russia.

Synonym:

IMA1993-057

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Menshikovite Crystallography

Axial Ratios:

a:c = 1:0.8018

Cell Dimensions:

a = 8.406, c = 6.74, Z = 4; V = 412.45 Den(Calc)= 10.65

Crystal System:

HexagonalSpace Group: P 6₃/m,P 6₃, or P 6₃22

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

By Intensity(I/I_o): 2.477(1)(202), 2.626(1)(112), 2.429(0.8)(300),1.818(0.7)(400), 1.978(0.7)(113), 1.781(0.7)(222), 2.283(0.7)(301),

Physical Properties of Menshikovite

Cleavage:

None

Color:

White.

Diaphaniety:

Opaque

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Hardness:

5 - Apatite

Luster:

Metallic

Streak:

gray

Optical Properties of Menshikovite

RL Anisotrophism:

Weak mosaic-like, light gray to brownish gray.

RL Bireflectance:

None.

RL Color:

Pink with slight grayish tint.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Menshikovite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
470 nm	48.40	50.20
546 nm	51.20	53.20
589 nm	53.20	55.30
650 nm	56.60	58.70

**Standardized Intensity (100%) Reflection Spectra of Menshikovite in Oil**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
470 nm	38.50	39.30
546 nm	41.00	41.80
589 nm	42.30	43.30
650 nm	46.60	47.80

**Calculated Relative Intensity Colors of Menshikovite in Air**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%	160%	180%	190%
R₁
R₂

**Calculated Relative Intensity Colors of Menshikovite in Oil**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	230%
R₁
R₂

Calculated Properties of Menshikovite

Electron Density:

r_electron=9.44 gm/cc
note: r_Menshikovite=10.7 gm/cc.

Fermion Index

Fermion Index = 0.10979
Boson Index = 0.89021

Photoelectric:

PE_Menshikovite= 146.48 barns/electron
U=PE_Menshikovite x r_electron=1,382.12 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Menshikovite is Not Radioactive

Menshikovite Classification

Dana Class:

2.4.16.2 (2)Sulfides - Including Selenides and Tellurides

(2.4)where Am Bn Xp, with (m+n):p=2:1

(2.4.16)Dana Group

2.4.16.1 Majakite PdNiAs Unk Hex

2.4.16.2 Menshikovite ! Pd3Ni2As3 P 6₃/m,P 6₃, or P 6₃22 Hex

Strunz Class:

II/A.05-112 II - Sulfides and sulphosalts

II/A - Alloys and alloylike compounds, with metals of the Platinum series, (Palladium)

II/A.05 - Atheneite - Genkinite series

II/A.05-10 Atheneite (Pd,Hg)3As P 6/mmm 6/m 2/m 2/m

II/A.05-20 Vincentite (Pd,Pt)3(As,Sb,Te) Unk Mono

II/A.05-30 Stillwaterite Pd8As3 P 3 3

II/A.05-40 Arsenopalladinite Pd8(As,Sb)3 P1 1

II/A.05-50 Isomertieite Pd11Sb2As2 F d3m 4/m 3 2/m

II/A.05-60 Mertieite-I Pd11(Sb,As)4 Unk Hex

II/A.05-70 Mertieite-II Pd8(Sb,As)3 R 3c 3m

II/A.05-80 Stibiopalladinite Pd5Sb2 P 6₃mc 6mm

II/A.05-90 Palladoarsenide Pd2As P 2/m 2/m

II/A.05-100 Palladobismutharsenide Pd2(As,Bi) Pmcn,P 2₁cn Ortho

II/A.05-102 Palladodymite! (Pd,Rh)2As P nma 2/m 2/m 2/m

II/A.05-105 Rhodarsenide! (Rh,Pd)2As P nma or Pn2 Ortho

II/A.05-110 Majakite PdNiAs Unk Hex

II/A.05-112 Menshikovite Pd3Ni2As3 P 6₃/m,P 6₃, or P 6₃22 Hex

II/A.05-115 Polkanovite! Rh12As7 P 6₃m 6/m

II/A.05-120 Genkinite (Pt,Pd)4Sb3 P 4₁2₁2 4 2 2

Other Menshikovite Information

References:

NAME( AmMin, v 88, p 477) PHYS. PROP.(AmMin, v 86, p 939 and v 88, p 477) OPTIC PROP.(AmMin, v 88, p 477)

See Also:

Links to other databases for Menshikovite :
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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Menshikovite

Pd3Ni2As3
Dana No: 2.4.16.2 Strunz No: II/A.05-112
Locality:

Notes: