Froodite Mineral Data

Froodite Mineral Data +

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General Froodite Information

Chemical Formula:

PdBi2

Composition:

Molecular Weight = 524.38 gm

Bismuth 79.71 % Bi

Palladium 20.29 % Pd

______

100.00 %

Empirical Formula:

PdBi₂

Environment:

In mill concentrates of As- and Pb-Cu-rich ores.

IMA Status:

Valid Species (Pre-IMA) 1958

Locality:

Frood, Creighton and Coleman mines, Sudbury, Ontario. Link to MinDat.org Location Data.

Name Origin:

For the Frood mine in Canada, in which it occurs.

Synonym:

ICSD 42565

PDF 27-436

Froodite Image

Images:

Froodite

Comments: Froodite grain (see arrow) in mostly chalcopyrite matrix.
Location: Oktyabr'skoye Mine, Norilsk, Krasnoyarsk Territory, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Froodite Maslovite Altaite

Comments: Reflected light photomicrograph of maslovite (M), froodite (F), and altaite (A), in chalcopyrite matrix.
Location: Oktyabr'skoye Mine, Norilsk, Krasnoyarsk Territory, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Froodite Crystallography

Axial Ratios:

a:b:c =2.972:1:1.3216

Cell Dimensions:

a = 12.75, b = 4.29, c = 5.67, Z = 4; beta = 102.867° V = 302.35 Den(Calc)= 11.52

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): 2.77(1), 1.556(0.8), 2.97(0.7),

Physical Properties of Froodite

Cleavage:

[001] Perfect, [100] Good

Color:

Gray.

Density:

12.5 - 12.6, Average = 12.55

Diaphaniety:

Opaque

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Hardness:

2.5 - Finger Nail

Luster:

Metallic

Streak:

black

Optical Properties of Froodite

RL Anisotrophism:

Evident, in light and dark grays.

RL Color:

Creamy white.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Froodite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
420 nm	50.70	52.90
440 nm	51.90	54.30
460 nm	53.10	55.50
480 nm	54.30	56.40
500 nm	55.20	57.20
520 nm	55.70	57.80
540 nm	56.10	58.40
560 nm	56.50	59.00
580 nm	56.90	59.60
600 nm	57.40	60.20
620 nm	57.70	60.70
640 nm	58.00	61.10
660 nm	58.50	61.40
680 nm	58.80	62.00
700 nm	59.30	63.00

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

Calculated Properties of Froodite

Electron Density:

r_electron=9.31 gm/cc
note: r_Froodite=11.5 gm/cc.

Fermion Index

Fermion Index = 0.04531
Boson Index = 0.95469

Photoelectric:

PE_Froodite=1,638.85 barns/electron
U=PE_Froodite x r_electron=15265.44 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Froodite is Not Radioactive

Froodite Classification

Dana Class:

2.12.15.1 (2)Sulfides - Including Selenides and Tellurides

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

(2.12.15)Dana Group

2.12.15.1 Froodite PdBi2 C 2/m 2/m

2.12.15.2 Urvantsevite Pd(Bi,Pb)2 I 4/mmm 4/m 2/m 2/m

2.12.15.3 Verbeekite! PdSe2 C 2, Cm, or C 2/m Mono

Strunz Class:

II/D.21-10 II - Sulfides and sulphosalts

II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold

II/D.21 - Borishanskiite -Urvantsevite series

II/D.21-05 Borishanskiite Pd1x(As,Pb)2,x=0-0.2 Ccm21 mm2

II/D.21-10 Froodite PdBi2 C 2/m 2/m

II/D.21-20 Urvantsevite Pd(Bi,Pb)2 I 4/mmm 4/m 2/m 2/m

Other Froodite Information

References:

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

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

Froodite

PdBi2
Dana No: 2.12.15.1 Strunz No: II/D.21-10
Locality:

Notes: