Keithconnite Mineral Data

Keithconnite Mineral Data +

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General Keithconnite Information

Chemical Formula:

Pd3-xTe(x=0.14 to 0.43)

Composition:

Molecular Weight = 425.58 gm

Tellurium 29.98 % Te

Palladium 70.02 % Pd

______

100.00 %

Empirical Formula:

Pd_2.8Te

Environment:

Cumulate ultra-mafic hosted sulfide mineralization.

IMA Status:

Approved IMA 1979

Locality:

Stillwater Pt-Pd J-M reef complex, Nye County, Montana, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Keith Conn (1923), U.S. Geologist who investigated the Stillwater Complex, Nye, Montana, USA.

Synonym:

ICSD 42551

IMA1978-032

PDF 34-1461

Keithconnite Image

Images:

Click Here for Larger Keithconnite Image

Keithconnite Kotulskite Telluropalladinite

Comments: Polyphase grain of (1) ferroan platinum corroded by (2) Pt(Fe,Cu) and overgrown by (5) telluropalladinite, an unknown (6) Pd-Te-Fe-Si-O phase, (7) Fe-hydroxide and (8) a Ca-Mn-Fe silicate with inclusions of (3) kotulskite and (4) keithconnite. (BGR).
Location: Stream sediments of rivers in the vicinity of the original discovery of the Merensky Reef on the farm Maandagshoek close to Burgersfort in the Eastern Bushveld, South Africa.. Scale: See Image.
© Federal Institute for Geosciences and Natural Resources

Keithconnite Crystallography

Axial Ratios:

a:c = 1:0.99563

Cell Dimensions:

a = 11.45, c = 11.4, Z = 18; V = 1,294.33 Den(Calc)= 9.83

Crystal System:

Trigonal - RhombohedralH-M Symbol ( 3) Space Group: R 3

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

By Intensity(I/I_o): 2.26(1), 2.16(0.9), 0.791(0.4),0.885(0.3), 1.32(0.3), 1.4(0.2), 2.22(0.2),

Physical Properties of Keithconnite

Color:

Gray white.

Diaphaniety:

Opaque

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Hardness:

5 - Apatite

Luster:

Metallic

Optical Properties of Keithconnite

RL Anisotrophism:

Moderate to strong.

RL Color:

Cream colored, dull cream with brownish tint with kotulskite, gray with telluropalladinite.

RL Pleochroism:

Not detectable in air, very slight in oil.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Keithconnite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	40.80	40.60
420 nm	41.60	41.10
440 nm	41.80	41.50
460 nm	42.00	42.00
480 nm	42.30	42.60
500 nm	42.90	43.40
520 nm	43.60	44.10
540 nm	44.40	44.90
560 nm	45.30	45.80
580 nm	46.00	46.60
600 nm	46.80	47.50
620 nm	48.00	48.80
640 nm	49.30	49.90
660 nm	50.60	50.90
680 nm	52.00	52.10
700 nm	53.50	53.40

**Calculated Relative Intensity Colors of Keithconnite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%
R₁
R₂

Calculated Properties of Keithconnite

Electron Density:

r_electron=8.35 gm/cc
note: r_Keithconnite=9.83 gm/cc.

Fermion Index

Fermion Index = 0.1803
Boson Index = 0.8197

Photoelectric:

PE_Keithconnite= 280.65 barns/electron
U=PE_Keithconnite x r_electron=2,344.08 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Keithconnite is Not Radioactive

Keithconnite Classification

Dana Class:

2.2.6.1 (2)Sulfides - Including Selenides and Tellurides

(2.2)where Am Bn Xp, with (m+n):p=3:1

(2.2.6)Dana Group

2.2.6.1 Keithconnite Pd3-xTe(x=0.14to0.43) R 3 3

Strunz Class:

II/A.07-20 II - Sulfides and sulphosalts

II/A - Alloys and alloylike compounds, with metals of the Platinum series, (Palladium)

II/A.07 - Telargpalite - Borovskite series

II/A.07-10 Telargpalite (Pd,Ag)3Te Unk Cubic

II/A.07-20 Keithconnite Pd3-xTe(x=0.14to0.43) R 3 3

II/A.07-30 Telluropalladinite Pd9Te4 P 2₁/c 2/m

II/A.07-35 Oulankaite! (Pd,Pt)5(Cu,Fe)4SnTe2S2 Tetra

II/A.07-40 Sopcheite Ag4Pd3Te4 Unk Ortho

II/A.07-50 Temagamite Pd3HgTe3 Unk Ortho

II/A.07-60 Borovskite Pd3SbTe4 F m3m 4/m 3 2/m

Other Keithconnite Information

References:

NAME( Dana8) PHYS. PROP.(AntBidBlaNic1) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Keithconnite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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

Keithconnite

Pd3-xTe(x=0.14 to 0.43)
Dana No: 2.2.6.1 Strunz No: II/A.07-20
Locality:

Notes: