Stumpflite Mineral Data

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General Stumpflite Information

Chemical Formula:

Pt(Sb,Bi)

Composition:

Molecular Weight = 338.64 gm

Bismuth 15.43 % Bi

Antimony 26.96 % Sb

Platinum 57.61 % Pt

______

100.00 %

Empirical Formula:

PtSb_0.75Bi_0.25

Environment:

In platinum concentrates from an ultramafic pipe deposit intergrown with geversite.

IMA Status:

Approved IMA 1972

Locality:

Driekop mine, Transvaal, South Africa Link to MinDat.org Location Data.

Name Origin:

Named for Eugen Friedrich Stumpfl (1931-), Mineralogist, Mining University Leoben, Austria.

Name Pronunciation:

Stumpflite + Pronunciation

Synonym:

ICSD 42547

PDF 25-1482

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Stumpflite Crystallography

Axial Ratios:

a:c = 1:1.31832

Cell Dimensions:

a = 4.175, c = 5.504, Z = 2; V = 83.08 Den(Calc)= 13.54

Crystal System:

Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6₃/mmc

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

By Intensity(I/I_o): 2.192(1), 3.027(1), 2.088(0.8),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Wyckoff R W G , Crystal Structures , 1 (1963) p.85-237, Second edition. Interscience Publishers, New York, New York, Note: ideal nickel arsenide structure

Physical Properties of Stumpflite

Cleavage:

None

Color:

Silver white.

Density:

13.52

Diaphaneity:

Opaque

Habit:

Inclusions - Generally found as inclusions in other minerals.

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

5 - Apatite

Luster:

Metallic

Optical Properties of Stumpflite

RL Anisotrophism:

Strong, in brownish yellow.

RL Color:

Cream.

RL Pleochroism:

Perceptible.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Stumpflite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	42.70	46.60
420 nm	46.00	49.40
440 nm	49.30	52.20
460 nm	52.10	54.90
480 nm	54.50	57.30
500 nm	56.60	59.40
520 nm	58.10	61.30
540 nm	59.30	63.00
560 nm	60.20	64.40
580 nm	61.20	65.60
600 nm	62.10	66.60
620 nm	62.90	67.50
640 nm	63.60	68.50
660 nm	64.40	69.20
680 nm	64.90	70.00
700 nm	65.20	70.60

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

Calculated Properties of Stumpflite

Electron Density:

Bulk Density (Electron Density)=11.0 gm/cc
note: Specific Gravity of Stumpflite =13.5 gm/cc.

Fermion Index:

Fermion Index = 0.19
Boson Index = 0.81

Photoelectric:

PE_Stumpflite=1,327.08 barns/electron
U=PE_Stumpflite x rElectron Density=14538.88 barns/cc.

Radioactivity:

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

Stumpflite Classification

Dana Class:

02.08.11.08 (02)Sulfides - Including Selenides and Tellurides

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

(02.08.11)Nickeline Group (Hexagonal: P63/mmc)

02.08.11.01 Nickeline NiAs P 6₃/mmc 6/m 2/m 2/m

02.08.11.02 Breithauptite NiSb P 6₃/mmc 6/m 2/m 2/m

02.08.11.03 Sederholmite NiSe P 6₃/mmc 6/m 2/m 2/m

02.08.11.04 Hexatestibiopanickelite (Ni,Pd)(Te,Sb) P 6₃/mmc 6/m 2/m 2/m

02.08.11.05 Sudburyite (Pd,Ni)Sb P 6₃/mmc 6/m 2/m 2/m

02.08.11.06 Kotulskite Pd(Te,Bi) P 6₃/mmc 6/m 2/m 2/m

02.08.11.07 Sobolevskite PdBi P 6₃/mmc 6/m 2/m 2/m

02.08.11.08 Stumpflite Pt(Sb,Bi) P 6₃/mmc 6/m 2/m 2/m

02.08.11.09 Langisite (Co,Ni)As P 6₃/mmc 6/m 2/m 2/m

02.08.11.10 Freboldite CoSe P 6₃/mmc 6/m 2/m 2/m

02.08.11.11 Achavalite! FeSe P 6₃/mmc 6/m 2/m 2/m

02.08.11.12 Sorosite! Cu(Sn,Sb) P 6₃/mmc 6/m 2/m 2/m

02.08.11.13 Vavrinite! Ni2SbTe2 P 6₃/mmc 6/m 2/m 2/m

Strunz Class:

02.CC.05 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.C - Metal Sulfides, M:S = 1:1 (and similar)

02.CC -With Ni, Fe, Co, PGE, etc.

02.CC.05 Achavalite FeSe P 6₃/mmc 6/m 2/m 2/m

02.CC.05 Breithauptite NiSb P 6₃/mmc 6/m 2/m 2/m

02.CC.05 Freboldite CoSe P 6₃/mmc 6/m 2/m 2/m

02.CC.05 Hexatestibiopanickelite (Ni,Pd)(Te,Sb) P 6₃/mmc 6/m 2/m 2/m

02.CC.05 Langisite (Co,Ni)As P 6₃/mmc 6/m 2/m 2/m

02.CC.05 Jaipurite* CoS P 6₃/mmc 6/m 2/m 2/m

02.CC.05 Kotulskite Pd(Te,Bi) P 6₃/mmc 6/m 2/m 2/m

02.CC.05 Nickeline NiAs P 6₃/mmc 6/m 2/m 2/m

02.CC.05 Zlatogorite! CuNiSb2 P 3m1 3 2/m

02.CC.05 Sederholmite NiSe P 6₃/mmc 6/m 2/m 2/m

02.CC.05 Stumpflite Pt(Sb,Bi) P 6₃/mmc 6/m 2/m 2/m

02.CC.05 Sudburyite (Pd,Ni)Sb P 6₃/mmc 6/m 2/m 2/m

02.CC.05 Sobolevskite PdBi P 6₃/mmc 6/m 2/m 2/m

Other Stumpflite Information

References:

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

See Also:

Links to other databases for Stumpflite :
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 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Ask about Stumpflite here :
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Print or Cut-and-Paste your Stumpflite Specimen Label here :

Stumpflite

Pt(Sb,Bi)
Dana No: 02.08.11.08 Strunz No: 02.CC.05
Locality:

Notes: