Skaergaardite Mineral Data

Skaergaardite Mineral Data

General Skaergaardite Information

Chemical Formula:

CuPd

Composition:

Molecular Weight = 173.19 gm

Zinc 1.47 % Zn

Iron 3.87 % Fe

Copper 30.09 % Cu

Tin 1.10 % Sn

Tellurium 0.29 % Te

Palladium 59.42 % Pd

Platinum 1.13 % Pt

Lead 0.36 % Pb

Gold 2.27 % Au

______

100.00 %

Empirical Formula:

Pd_0.967Au_0.02Pt_0.01Cu_0.82Fe⁰⁺_0.12Zn_0.039Sn_0.016Te_0.004Pb_0.003

Environment:

Minor sulfide phase associated with an ultrabasic, rhythmically layered gabbroic body. CsCl structure, isostructural with wairauite.

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

Skaergaard intrusion, Kangerdlugssuaq area, East Greenland. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

IMA2003-049

Skaergaardite Image

Images:

Skaergaardite

Comments: (e) A euhedral crystal of skaergaardite exhibiting the form cube {100} (possibly distorted) included in a bornite-chalcocite i(BN+CC) grain. (f) bornite (BN)+ chalcopyrite (CP) microglobule with a skaergaardite cube with rounded edges. (MinMag 68:615).
Location: Drill core taken from the Skaergaard intrusion, Kangerdlugssuaq area, East Greenland. Scale: See Image.
© Mineralogical Magazine

Skaergaardite Crystallography

Cell Dimensions:

a = 3.0014, Z = 1; V = 27.04 Den(Calc)= 10.63

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: P m3m

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

By Intensity(I/I_o): 0.8666(1)(222), 2.122(1)(110), 0.8021(0.7)(321),1.2254(0.5)(211), 0.9491(0.2)(310), 1.5(0.2)(200),

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: CsCl structure, cesium chloride structure

Physical Properties of Skaergaardite

Cleavage:

None

Color:

Steel gray, Bronze gray.

Diaphaniety:

Opaque

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Habit:

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

Hardness:

4-5 - Fluorite-Apatite

Luster:

Metallic

Streak:

black

Optical Properties of Skaergaardite

RL Anisotrophism:

None.

RL Bireflectance:

None.

RL Color:

Creamy to bright white with no internal reflections.

RL Pleochroism:

None.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Skaergaardite in Air**
λ	R	∑ R(λ)
400 nm	55.10
420 nm	56.10
440 nm	56.90
460 nm	58.00
470 nm	58.70
480 nm	59.30
500 nm	60.20
520 nm	61.20
540 nm	62.40
546 nm	62.60
560 nm	63.00
580 nm	63.90
589 nm	64.10
600 nm	64.30
620 nm	64.90
640 nm	65.10
650 nm	65.30
660 nm	65.40
680 nm	65.70
700 nm	66.20

**Standardized Intensity (100%) Reflection Spectra of Skaergaardite in Oil**
λ	R	∑ R(λ)
400 nm	43.80
420 nm	44.80
440 nm	45.70
460 nm	46.80
470 nm	47.40
480 nm	48.10
500 nm	49.00
520 nm	50.20
540 nm	50.90
546 nm	51.10
560 nm	51.70
580 nm	52.60
589 nm	52.80
600 nm	53.00
620 nm	53.40
640 nm	53.80
650 nm	53.95
660 nm	54.10
680 nm	54.60
700 nm	55.00

**Calculated Relative Intensity Colors of Skaergaardite in Air**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%	160%
R

**Calculated Relative Intensity Colors of Skaergaardite in Oil**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%	160%	180%	190%
R

Calculated Properties of Skaergaardite

Electron Density:

r_electron=9.35 gm/cc
note: r_{Skaergaardite}=10.6 gm/cc.

Fermion Index

Fermion Index = 0.14076
Boson Index = 0.85924

Photoelectric:

PE_{Skaergaardite}= 220.27 barns/electron
U=PE_{Skaergaardite} x r_electron=2,059.44 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Skaergaardite is Not Radioactive

Skaergaardite Classification

Dana Class:

1.2.13.1 (1)Native Elements

(1.2)with platinum group metals and alloys

(1.2.13)CsCl structure (Pm3m)

1.2.13.1 Skaergaardite ! CuPd P m3m 4/m 3 2/m

Strunz Class:

I/A.14-100 I - Elements

I/A - Metallic and intermetallic compounds, Carbides, Nitrides, Phosphides and Silicides

I/A.14 - Platinum series

I/A.14-10 Rhodium (Rh,Pt) F m3m 4/m 3 2/m

I/A.14-20 Palladium Pd,Pt F m3m 4/m 3 2/m

I/A.14-30 Iridium (Ir,Os,Ru,Pt) F m3m 4/m 3 2/m

I/A.14-70 Platinum Pt F m3m 4/m 3 2/m

I/A.14-80 Yixunite! Pt3In P m3m 4/m 3 2/m

I/A.14-85 Damiaoite! PtIn2 F m3m 4/m 3 2/m

I/A.14-90 Hongshiite* PtCu R 3m 3 2/m

I/A.14-100 Skaergaardite CuPd P m3m 4/m 3 2/m

Other Skaergaardite Information

References:

NAME( MinMag 68:615) PHYS. PROP.(MinMag 68:615) OPTIC PROP.(MinMag 68:615)

See Also:

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

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Skaergaardite

CuPd
Dana No: 1.2.13.1 Strunz No: I/A.14-100
Locality:

Notes: