Palladobismutharsenide Mineral Data

Palladobismutharsenide Mineral Data +

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General Palladobismutharsenide Information

Chemical Formula:

Pd2(As,Bi)

Composition:

Molecular Weight = 314.57 gm

Bismuth 13.29 % Bi

Arsenic 19.05 % As

Palladium 67.66 % Pd

______

100.00 %

Empirical Formula:

Pd₂As_0.8Bi_0.2

Environment:

Ultrabasic igneous intrusion.

IMA Status:

Approved IMA 1976

Locality:

Stillwater complex, Nye County, Montana, USA. Link to MinDat.org Location Data.

Name Origin:

Named for the composition (Pd, Bi, As).

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Palladobismutharsenide Crystallography

Axial Ratios:

a:b:c =0.3941:1:0.3587

Cell Dimensions:

a = 7.467, b = 18.946, c = 6.797, Z = 20; V = 961.57 Den(Calc)= 10.86

Crystal System:

OrthorhombicSpace Group: Pmcn,P 2₁cn

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

By Intensity(I/I_o): 2.232(1), 2.083(0.9), 2.485(0.9),

Physical Properties of Palladobismutharsenide

Color:

Silver white.

Density:

10.86

Diaphaniety:

Opaque

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

5 - Apatite

Luster:

Metallic

Optical Properties of Palladobismutharsenide

RL Anisotrophism:

Weak to distinct, in air from gray to extinction; under oil varying from gray to brownish gray.

RL Color:

Creamy.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Palladobismutharsenide in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
470 nm	53.60	54.50
546 nm	52.10	53.00
589 nm	53.60	54.60
650 nm	55.80	56.10

**Calculated Relative Intensity Colors of Palladobismutharsenide in Air**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%	160%	170%
R₁
R₂

Calculated Properties of Palladobismutharsenide

Electron Density:

r_electron=9.32 gm/cc
note: r_{Palladobismutharsenide}=10.9 gm/cc.

Fermion Index

Fermion Index = 0.15108
Boson Index = 0.84892

Photoelectric:

PE_{Palladobismutharsenide}= 428.37 barns/electron
U=PE_{Palladobismutharsenide} x r_electron=3,992.90 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Palladobismutharsenide is Not Radioactive

Palladobismutharsenide Classification

Dana Class:

2.4.15.1 (2)Sulfides - Including Selenides and Tellurides

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

(2.4.15)Dana Group

2.4.15.1 Palladobismutharsenide Pd2(As,Bi) Pmcn,P 2₁cn Ortho

Strunz Class:

II/A.05-100 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 Palladobismutharsenide Information

References:

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

See Also:

Links to other databases for Palladobismutharsenide :
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 10 -École des Mines de Paris

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Palladobismutharsenide

Pd2(As,Bi)
Dana No: 2.4.15.1 Strunz No: II/A.05-100
Locality:

Notes: