Laflammeite Mineral Data

Laflammeite Mineral Data

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General Laflammeite Information

Chemical Formula:

Pd3Pb2S2

Composition:

Molecular Weight = 797.79 gm

Palladium 40.02 % Pd

Lead 51.94 % Pb

Sulfur 8.04 % S

______

100.00 %

Empirical Formula:

Pd₃Pb₂S₂

Environment:

Found with other PGM minerals in an ultra-basic intrusion. Related to parkerite Ni3Bi2S2

IMA Status:

Approved IMA 2002 (Dana # Added)

Locality:

Penikat layered complex, Finland. Link to MinDat.org Location Data.

Name Origin:

Named for J. H. Gilles Laflamme (1947-) of CANMET, Ottawa, who has contributed to the study of numerous PGM.

Synonym:

IMA2000-014

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Images:

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Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Laflammeite Crystallography

Axial Ratios:

a:b:c =1.4024:1:1.0115

Cell Dimensions:

a = 11.673, b = 8.323, c = 8.419, Z = 4; beta = 135.38° V = 574.52 Den(Calc)= 9.22

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

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

By Intensity(I/I_o): 4.144(1)(020), 2.917(0.9)(220), 2.413(0.8)(022),2.365(0.7)(422), 5.953(0.6)(001), 2.082(0.5), 3.379(0.4),

Physical Properties of Laflammeite

Cleavage:

[010] Perfect

Color:

Brownish cream.

Diaphaniety:

Opaque

Fracture:

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

Habit:

Platy - Sheet forms (e.g. micas).

Habit:

Subhedral Crystals - Occurs as crystals which tend to exhibit a recognizable crystal shape.

Hardness:

3.5 - Copper Penny

Luster:

Metallic

Streak:

dark gray

Optical Properties of Laflammeite

RL Anisotrophism:

Weak, with brownish gray to grayish brown.

RL Bireflectance:

Weak.

RL Color:

Cream with brownish tints.

RL Pleochroism:

None.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Laflammeite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
470 nm	45.30	46.20
546 nm	46.50	47.55
589 nm	47.70	48.80
650 nm	49.60	50.00

**Standardized Intensity (100%) Reflection Spectra of Laflammeite in Oil**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
470 nm	31.55	32.45
546 nm	32.60	33.75
589 nm	33.90	35.05
650 nm	36.00	36.30

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

**Calculated Relative Intensity Colors of Laflammeite in Oil**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	240%	270%	280%
R₁
R₂

Calculated Properties of Laflammeite

Electron Density:

r_electron=7.72 gm/cc
note: r_Laflammeite=9.22 gm/cc.

Fermion Index

Fermion Index = 0.20475
Boson Index = 0.79525

Photoelectric:

PE_Laflammeite=1,052.80 barns/electron
U=PE_Laflammeite x r_electron=8,127.65 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Laflammeite is Not Radioactive

Laflammeite Classification

Dana Class:

2.3.7.1 (2)Sulfides - Including Selenides and Tellurides

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

(2.3.7)Dana Group

2.3.7.1 Laflammeite ! Pd3Pb2S2 C 2/m 2/m

Strunz Class:

II/B.12-25 II - Sulfides and sulphosalts

II/B - Sulfides with metal: sulfur, selenium and tellurium > 1:1, Sulfides with predominant Nickel, Cobalt, Rhodium and Palladium

II/B.12 - Rhodplumsite - Oregonite series

II/B.12-10 Rhodplumsite Pb2Rh3S2 R 3m 3 2/m

II/B.12-20 Shandite Pb2Ni3S2 R 3m 3 2/m

II/B.12-25 Laflammeite Pd3Pb2S2 C 2/m 2/m

II/B.12-30 Parkerite Ni3(Bi,Pb)2S2 Pmam 2/m 2/m 2/m

II/B.12-40 Heazlewoodite Ni3S2 R 32 3 2

II/B.12-50 Oregonite Ni2FeAs2 Unk Hex

Other Laflammeite Information

References:

NAME( AmMin, Vol 88, p 476) PHYS. PROP.(AmMin, Vol 88, p 476) OPTIC PROP.(AmMin, Vol 88, p 476)

See Also:

Links to other databases for Laflammeite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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

Laflammeite

Pd3Pb2S2
Dana No: 2.3.7.1 Strunz No: II/B.12-25
Locality:

Notes: