Stibiopalladinite Mineral Data

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.

Name Pronunciation:

Stibiopalladinite + Pronunciation

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),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
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El-Boragy M , Bhan S , Schubert K , Journal of the Less-Common Metals , 22 (1970) p.445-458, Die kristallstruktur von Pd5Sb2 und Ni5As2 und einigen varianten, Locality: synthetic

Physical Properties of Stibiopalladinite

Cleavage:

{???} Indistinct

Color:

Steel gray, Silver gray, Silver white.

Density:

9.5

Diaphaneity:

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:

Bulk Density (Electron Density)=9.29 gm/cc
note: Specific Gravity of Stibiopalladinite =10.9 gm/cc.

Fermion Index:

Fermion Index = 0.15
Boson Index = 0.85

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Stibiopalladinite is Not Radioactive

Stibiopalladinite Classification

Dana Class:

02.03.03.01 (02)Sulfides - Including Selenides and Tellurides

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

(02.03.03)Dana Group

02.03.03.01 Stibiopalladinite Pd5Sb2 P 6₃mc 6mm

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

Strunz Class:

02.AC.20a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.A - Simple Sulfides, Selenides, etc

02.AC -Alloys of metalloids with PGE

02.AC.20a Stibiopalladinite Pd5Sb2 P 6₃mc 6mm

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 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Print or Cut-and-Paste your Stibiopalladinite Specimen Label here :

Stibiopalladinite

Pd5Sb2
Dana No: 02.03.03.01 Strunz No: 02.AC.20a
Locality:

Notes: