Mertieite-II Mineral Data

Mertieite-II Mineral Data +

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General Mertieite-II Information

Chemical Formula:

Pd8(Sb,As)3

Composition:

Molecular Weight = 1,211.93 gm

Antimony 29.13 % Sb

Arsenic 0.62 % As

Palladium 70.25 % Pd

______

100.00 %

Empirical Formula:

Pd₈Sb_2.9As_0.1

Environment:

Small grains in precious metal concentrates.

IMA Status:

Approved IMA 1973

Locality:

Goodnews Bay, Alaska, USA. Link to MinDat.org Location Data.

Name Origin:

Named for John B. Mertie (1888-1980), geologist, U.S. Geological Survey.

Mertieite-II Image

Images:

Mertieite-II

Comments: Oil immersion hotomicrograph of inclusions of mertieite-II in matrix of Pt-Fe alloy (CanMin, v 42, p 614).
Location: Kondyor PGE placer, Khabarovskiy Kray, eastern Siberia, Russia. Scale: See Image.
© Canadian Mineralogist

Mertieite-II Crystallography

Axial Ratios:

a:c = 1:5.64452

Cell Dimensions:

a = 7.601, c = 42.904, Z = 12; V = 2,146.69 Den(Calc)= 11.25

Crystal System:

Trigonal - Ditrigonal PyramidalH-M Symbol (3m) Space Group: R 3c

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

By Intensity(I/I_o): 2.191(1), 2.281(0.9), 1.23(0.6),

Physical Properties of Mertieite-II

Color:

Brass yellow.

Density:

11.29

Diaphaniety:

Opaque

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Habit:

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

Hardness:

6 - Orthoclase

Luster:

Metallic

Optical Properties of Mertieite-II

RL Anisotrophism:

Distinct, dark blue-gray to dark brown.

RL Color:

Brassy yellow.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Mertieite-II in Air**
λ	R	∑ R(λ)
420 nm	45.00
440 nm	44.40
460 nm	44.70
480 nm	45.60
500 nm	47.00
520 nm	48.70
540 nm	50.10
560 nm	51.30
580 nm	52.30
600 nm	53.20
620 nm	54.00
640 nm	54.90
660 nm	55.70
680 nm	56.50
700 nm	57.60

**Calculated Relative Intensity Colors of Mertieite-II in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	200%
R

Calculated Properties of Mertieite-II

Electron Density:

r_electron=9.64 gm/cc
note: r_Mertieite-II=11.3 gm/cc.

Fermion Index

Fermion Index = 0.15686
Boson Index = 0.84314

Photoelectric:

PE_Mertieite-II= 271.97 barns/electron
U=PE_Mertieite-II x r_electron=2,621.59 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Mertieite-II is Not Radioactive

Mertieite-II Classification

Dana Class:

2.16.3.1 (2)Sulfides - Including Selenides and Tellurides

(2.16)with miscellaneous formulae

(2.16.3)Dana Group

2.16.3.1 Mertieite-II Pd8(Sb,As)3 R 3c 3m

Strunz Class:

II/A.05-70 II - Sulfides and sulphosalts

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

II/A.05 - Atheneite - Genkinite series

II/A.05-10 Atheneite (Pd,Hg)3As P 6/mmm 6/m 2/m 2/m

II/A.05-20 Vincentite (Pd,Pt)3(As,Sb,Te) Unk Mono

II/A.05-30 Stillwaterite Pd8As3 P 3 3

II/A.05-40 Arsenopalladinite Pd8(As,Sb)3 P1 1

II/A.05-50 Isomertieite Pd11Sb2As2 F d3m 4/m 3 2/m

II/A.05-60 Mertieite-I Pd11(Sb,As)4 Unk Hex

II/A.05-70 Mertieite-II Pd8(Sb,As)3 R 3c 3m

II/A.05-80 Stibiopalladinite Pd5Sb2 P 6₃mc 6mm

II/A.05-90 Palladoarsenide Pd2As P 2/m 2/m

II/A.05-100 Palladobismutharsenide Pd2(As,Bi) Pmcn,P 2₁cn Ortho

II/A.05-102 Palladodymite! (Pd,Rh)2As P nma 2/m 2/m 2/m

II/A.05-105 Rhodarsenide! (Rh,Pd)2As P nma or Pn2 Ortho

II/A.05-110 Majakite PdNiAs Unk Hex

II/A.05-112 Menshikovite! Pd3Ni2As3 P 6₃/m,P 6₃, or P 6₃22 Hex

II/A.05-115 Polkanovite! Rh12As7 P 6₃m 6/m

II/A.05-120 Genkinite (Pt,Pd)4Sb3 P 4₁2₁2 4 2 2

Other Mertieite-II Information

References:

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

See Also:

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

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Mertieite-II

Pd8(Sb,As)3
Dana No: 2.16.3.1 Strunz No: II/A.05-70
Locality:

Notes: