Stibiopalladinite Mineral Data

Stibiopalladinite Mineral Data +

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General Stibiopalladinite Information

Chemical Formula:

Pd5Sb2

Composition:

Molecular Weight = 775.60 gm

Antimony 31.40 % Sb

Palladium 68.60 % Pd

______

100.00 %

Empirical Formula:

Pd₅Sb₂

Environment:

An uncommon constituent of platinum deposits.

IMA Status:

Valid Species (Pre-IMA) 1929

Locality:

Tweefontein Farm, Potgietersrust district, Bushveld Complex, Transvaal, South Africa. Link to MinDat.org Location Data.

Name Origin:

Named for the composition.

Synonym:

ICSD 42680

PDF 25-597

Stibiopalladinite Image

Images:

Stibiopalladinite

Comments: Gray metallic stibiopalladinite, with bronze tarnish, flattened crystal grains.
Location: Choco, Columbia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Stibiopalladinite Crystallography

Axial Ratios:

a:c = 1:1.86826

Cell Dimensions:

a = 7.606, c = 14.21, Z = 6; V = 711.93 Den(Calc)= 10.85

Crystal System:

Hexagonal - Dihexagonal PyramidalH-M Symbol (6mm) Space Group: P 6₃mc

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

By Intensity(I/I_o): 2.194(1), 2.27(1), 1.577(0.5),

Physical Properties of Stibiopalladinite

Cleavage:

[???] Indistinct

Color:

Steel gray, Silver gray, Silver white.

Density:

9.5

Diaphaniety:

Opaque

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Habit:

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

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

4-5 - Fluorite-Apatite

Luminescence:

Non-fluorescent.

Luster:

Metallic

Magnetism:

Nonmagnetic

Streak:

black

Optical Properties of Stibiopalladinite

RL Anisotrophism:

Distinct, colors usually lacking but some grains are purplish gray to greenish gray.

RL Color:

Yellowish white.

RL Pleochroism:

Weak, in pale yellow to yellowish white, also sometimes faint greenish, pinkish, or lavender.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Stibiopalladinite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	39.90	40.60
420 nm	42.20	43.40
440 nm	44.50	46.20
460 nm	46.60	48.50
480 nm	48.40	50.40
500 nm	50.00	52.00
520 nm	51.40	53.20
540 nm	52.50	54.20
560 nm	53.50	54.80
580 nm	54.40	55.20
600 nm	55.40	55.60
620 nm	56.40	56.00
640 nm	57.40	56.60
660 nm	58.60	57.10
680 nm	59.70	57.60
700 nm	61.00	58.30

**Calculated Relative Intensity Colors of Stibiopalladinite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	200%
R₁
R₂

Calculated Properties of Stibiopalladinite

Electron Density:

r_electron=9.29 gm/cc
note: r_{Stibiopalladinite}=10.9 gm/cc.

Fermion Index

Fermion Index = 0.15319
Boson Index = 0.84681

Photoelectric:

PE_{Stibiopalladinite}= 275.48 barns/electron
U=PE_{Stibiopalladinite} x r_electron=2,558.88 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Stibiopalladinite is Not Radioactive

Stibiopalladinite Classification

Dana Class:

2.3.3.1 (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:

II/A.05-80 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 Stibiopalladinite Information

References:

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

See Also:

Links to other databases for Stibiopalladinite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 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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Print or Cut-and-Paste your Stibiopalladinite Specimen Label here :

Stibiopalladinite

Pd5Sb2
Dana No: 2.3.3.1 Strunz No: II/A.05-80
Locality:

Notes: