Palarstanide Mineral Data

Palarstanide Mineral Data +

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General Palarstanide Information

Chemical Formula:

Pd8(Sn,As)3

Composition:

Molecular Weight = 1,141.81 gm

Tin 15.60 % Sn

Arsenic 9.84 % As

Palladium 74.56 % Pd

______

100.00 %

Empirical Formula:

Pd₈Sn_1.5As_1.5

Environment:

Intergrown wiith other minerals in massive ores of cubanite, chalcopyrite, and talnakhite.

IMA Status:

Approved IMA 1981

Locality:

Talnakh, Norilsk, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for its composition (Palladium, Arsenic, Stannum(tin)).

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Palarstanide Crystallography

Axial Ratios:

a:c = 1:2.1816

Cell Dimensions:

a = 6.784, c = 14.8, Z = 4; V = 589.88 Den(Calc)= 12.86

Crystal System:

Hexagonal - TrapezohedralH-M Symbol (6 2 2) Space Group: P 6₃22

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

By Intensity(I/I_o): 2.22(1), 1.986(0.4), 2.5(0.4),

Physical Properties of Palarstanide

Cleavage:

[0001] Perfect

Color:

Steel gray.

Diaphaniety:

Opaque

Fracture:

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

Habit:

Hexagonal - Six-sided crystal shape in cross-section or habit.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

5 - Apatite

Luster:

Metallic

Optical Properties of Palarstanide

RL Anisotrophism:

Slight, dark gray to brownish gray.

RL Color:

Grayish white with a slight rose tint.

RL Pleochroism:

Distinct in oil.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Palarstanide in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
420 nm	46.00	49.20
440 nm	47.10	50.10
460 nm	48.10	51.10
480 nm	49.70	51.90
500 nm	50.80	52.80
520 nm	52.10	53.50
540 nm	53.20	54.50
560 nm	54.20	55.40
580 nm	55.10	56.40
600 nm	56.30	57.40
620 nm	57.20	58.30
640 nm	58.50	59.30
660 nm	59.30	60.10
680 nm	59.90	60.60
700 nm	60.00	61.00

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

Calculated Properties of Palarstanide

Electron Density:

r_electron=11.1 gm/cc
note: r_Palarstanide=12.9 gm/cc.

Fermion Index

Fermion Index = 0.19241
Boson Index = 0.80759

Photoelectric:

PE_Palarstanide= 237.97 barns/electron
U=PE_Palarstanide x r_electron=2,639.97 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Palarstanide is Not Radioactive

Palarstanide Classification

Dana Class:

2.3.3.2 (2)Sulfides - Including Selenides and Tellurides

(2.3)where Am Bn Xp, with (m+n):p=5:2

(2.3.3)Dana Group

2.3.3.1 Stibiopalladinite Pd5Sb2 P 6₃mc 6mm

2.3.3.2 Palarstanide Pd8(Sn,As)3 P 6₃22 6 2 2

Strunz Class:

I/A.16-60 I - Elements

I/A - Metallic and intermetallic compounds, Platinum-Iron-compounds with Tin/Lead and related compunds

I/A.16 - Zvyagintsevite - Plumbopalladinite series

I/A.16-10 Zvyagintsevite (Pd,Pt,Au)3(Pb,Sn) P m3m 4/m 3 2/m

I/A.16-20 Atokite (Pd,Pt)3Sn F m3m 4/m 3 2/m

I/A.16-30 Rustenburgite (Pt,Pd)3Sn F m3m 4/m 3 2/m

I/A.16-40 Niggliite PtSn P 6₃/mmc 6/m 2/m 2/m

I/A.16-50 Stannopalladinite (Pd,Cu)3Sn2(?) P 6₃/mmc 6/m 2/m 2/m

I/A.16-60 Palarstanide Pd8(Sn,As)3 P 6₃22 6 2 2

I/A.16-70 Plumbopalladinite Pd3Pb2 P 6₃/mmc 6/m 2/m 2/m

Other Palarstanide Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Palarstanide :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Palarstanide

Pd8(Sn,As)3
Dana No: 2.3.3.2 Strunz No: I/A.16-60
Locality:

Notes: