Chrisstanleyite Mineral Data

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General Chrisstanleyite Information

Chemical Formula:

Ag2Pd3Se4

Composition:

Molecular Weight = 833.49 gm

Copper 3.13 % Cu

Silver 20.58 % Ag

Palladium 38.69 % Pd

Selenium 37.61 % Se

______

100.00 %

Empirical Formula:

Cu_0.41Ag_1.59Pd_3.03Se_3.97

Environment:

In calcite veins cutting limestones.

IMA Status:

Approved IMA 1998 (Dana # Added)

Locality:

Hope's Nose, northern side of Tor Bay, Torquay, Devon, England, United Kingdom. Link to MinDat.org Location Data.

Name Origin:

For Dr. Chris J. Stanley (1954-) of The Natural History Museum in London, in recognition of his contributions to ore mineralogy.

Synonym:

IMA1996-044

Chrisstanleyite Image

Images:

Click Here for Larger Chrisstanleyite Image

Chrisstanleyite Hakite

Comments: Polished section showing chrisstanleyite (chr) is present as a single grain intergrown with clausthalite (cl) and eucairite (eu). cp (chalcopyrite), ha (hakite), di (selenian digenite), bo (bornite). (CanMin, v43:689).
Location: Low-temperature selenium-rich assemblage at Predborice, Czech Republic. Scale: See Image.
© Canadian Mineralogist

Images:

Chrisstanleyite Tischendorfite Tiemannite

Comments: Polished section (PPL) showing tischendorfite (T, cream), clausthalite (Cl, off-white), tiemannite (Tie, gray), ankerite (black) and chrisstanleyite (C, greenish buff to pale brown).
Location: Eskaborner Stollen (Eskeborn Adit) at Tilkerode, Harz, Mountains, Germany. (CanMin v40:739). Scale: Picture Size 275 µm.
© Canadian Mineralogist

Chrisstanleyite Crystallography

Axial Ratios:

a:b:c =0.5488:1:0.6131

Cell Dimensions:

a = 5.676, b = 10.342, c = 6.341, Z = 2; beta = 114.996° V = 337.36 Den(Calc)= 8.20

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/c

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

By Intensity(I/I_o): 1.956(1), 2.742(1), 2.688(0.8),

Crystal Structure:

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Topa D , Makovicky E , Balic-Zunic T , The Canadian Mineralogist , 44 (2006) p.497-505, The crystal structures of jagueite, Cu2Pd3Se4, and chrisstanleyite, Ag2Pd3Se4, Locality: El Chire, La Rioja, Argentina

Physical Properties of Chrisstanleyite

Color:

Gray, Silvery gray.

Density:

8.31

Diaphaneity:

Opaque

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

5 - Apatite

Luster:

Metallic

Streak:

black

Optical Properties of Chrisstanleyite

RL Anisotrophism:

Moderate.

RL Bireflectance:

Weak.

RL Color:

Very light buff to slightly gray-green.

RL Pleochroism:

Slight.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Chrisstanleyite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
470 nm	39.70	47.20
546 nm	43.10	48.80
589 nm	44.30	49.40
650 nm	44.40	49.20

**Standardized Intensity (100%) Reflection Spectra of Chrisstanleyite in Oil**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
470 nm	26.20	34.40
546 nm	29.30	35.15
589 nm	30.40	35.55
650 nm	31.00	35.60

**Calculated Relative Intensity Colors of Chrisstanleyite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	230%
R₁
R₂

**Calculated Relative Intensity Colors of Chrisstanleyite in Oil**
Relative Intensity	0%	40%	80%	100%	120%	160%	200%	240%	280%	320%	340%
R₁
R₂

Calculated Properties of Chrisstanleyite

Electron Density:

Bulk Density (Electron Density)=7.10 gm/cc
note: Specific Gravity of Chrisstanleyite =8.20 gm/cc.

Fermion Index:

Fermion Index = 0.11
Boson Index = 0.89

Photoelectric:

PE_{Chrisstanleyite}= 179.59 barns/electron
U=PE_{Chrisstanleyite} x rElectron Density=1,275.56 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Chrisstanleyite is Not Radioactive

Chrisstanleyite Classification

Dana Class:

02.16.10.02 (02)Sulfides - Including Selenides and Tellurides

(02.16)with miscellaneous formulae

(02.16.10)Chrisstanleyite Group

02.16.10.01 Sopcheite Ag4Pd3Te4 Unk Ortho

02.16.10.02 Chrisstanleyite! Ag2Pd3Se4 P 2₁/c 2/m

02.16.10.03 Jagueite! Cu2Pd3Se4 P 2₁/c 2/m

Strunz Class:

02.BC.15 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.B - Metal Sulfides, M:S > 1:1 (mainly 2:1)

02.BC -With Rh, Pd, Pt, etc.

02.BC.15 Chrisstanleyite! Ag2Pd3Se4 P 2₁/c 2/m

02.BC.15 Jagueite! Cu2Pd3Se4 P 2₁/c 2/m

Other Chrisstanleyite Information

References:

NAME( MinRec) PHYS. PROP.(AmMin, v91, p1952) OPTIC PROP.(MinRec, v 30, p 157)

See Also:

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

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

Chrisstanleyite

Ag2Pd3Se4
Dana No: 02.16.10.02 Strunz No: 02.BC.15
Locality:

Notes: