Tatyanaite Mineral Data

Tatyanaite Mineral Data

General Tatyanaite Information

Chemical Formula:

(Pt,Pd,Cu)9Cu3Sn4

Composition:

Molecular Weight = 14486.37 gm

Copper 13.42 % Cu

Tin 3.28 % Sn

Palladium 25.12 % Pd

Platinum 58.18 % Pt

______

100.00 %

Empirical Formula:

9(Pt_4.8)9(Pd_3.8)9(Cu_3.4)Sn₄

Environment:

Massive sulfide ores. Pt dominant endmember with taimyrite. In the central portion of Pt-Pd zoned grains.

IMA Status:

Approved IMA 1995 (Dana # Added)

Locality:

Oktyabr'sky deposit Noril'sk, Siberia, Russa. Link to MinDat.org Location Data.

Name Origin:

Named for the Russian mineralogist Tatyana L. Evstigneeva (or Yestigneeva) (1945-).

Synonym:

IMA1995-049

Tatyanaite Image

Images:

Tatyanaite Rustenburgite

Comments: Back-scattered electron images showing inclusions of rustenburgite intergrown with taimyrite-tatyanaite aggregates. (AmMin, v 42, p 608).
Location: Kondyor PGE placer, Khabarovskiy Kray, eastern Siberia, Russia. Scale: See Image.
© American Mineralogist

Tatyanaite Crystallography

Axial Ratios:

a:b:c =1.9385:1:1.8992

Cell Dimensions:

a = 7.89, b = 4.07, c = 7.73, Z = 0.14; V = 248.23 Den(Calc)= 13.57

Crystal System:

OrthorhombicSpace Group: P mmm,Pmm2,P 222

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

By Intensity(I/I_o): 2.283(1), 2.163(0.4), 1.369(0.3),

Physical Properties of Tatyanaite

Cleavage:

None

Color:

Pink.

Diaphaniety:

Opaque

Fracture:

Malleable - Deforms rather than breaking apart with a hammer.

Habit:

Ductile - Grains deform from mechanical stress. Characteristic of metals.

Habit:

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

Habit:

Platy - Sheet forms (e.g. micas).

Hardness:

3.5-4 - Copper Penny-Fluorite

Luster:

Metallic

Optical Properties of Tatyanaite

RL Anisotrophism:

Distinct to moderate, from light brown to dark blue.

RL Bireflectance:

Weak to distinct, brownish pink to pinkish lilac.

RL Color:

Pink with lilac tinge in air.

RL Pleochroism:

Weak to distinct, from brownish pink to pinkish lilac.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Tatyanaite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
470 nm	42.80	44.10
546 nm	49.50	50.00
589 nm	51.80	54.60
650 nm	55.60	56.80

**Standardized Intensity (100%) Reflection Spectra of Tatyanaite in Oil**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
470 nm	32.80	33.30
546 nm	37.60	38.80
589 nm	38.90	39.90
650 nm	41.60	44.20

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

**Calculated Relative Intensity Colors of Tatyanaite in Oil**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	240%	270%
R₁
R₂

Calculated Properties of Tatyanaite

Electron Density:

r_electron=11.3 gm/cc
note: r_Tatyanaite=13.6 gm/cc.

Fermion Index

Fermion Index = 0.25818
Boson Index = 0.74182

Photoelectric:

PE_Tatyanaite= 985.91 barns/electron
U=PE_Tatyanaite x r_electron=11138.31 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Tatyanaite is Not Radioactive

Tatyanaite Classification

Dana Class:

1.2.7.2 (1)Native Elements

(1.2)with platinum group metals and alloys

(1.2.7)Dana Group

1.2.7.1 Taimyrite (Pd,Cu,Pt)3Sn Unk Ortho

1.2.7.2 Tatyanaite ! (Pt,Pd,Cu)9Cu3Sn4 P mmm,Pmm2,P 222 Ortho

Strunz Class:

I/A.17-40 I - Elements

I/A - Metallic and intermetallic compounds, Platinum-Iron-compounds with Tin/Lead and related compunds

I/A.17 - Paolovite - Thaimyrite series

I/A.17-10 Paolovite Pd2Sn Pbnm 2/m 2/m 2/m

I/A.17-20 Cabriite Pd2SnCu P mmm 2/m 2/m 2/m

I/A.17-30 Taimyrite (Pd,Cu,Pt)3Sn Unk Ortho

I/A.17-40 Tatyanaite (Pt,Pd,Cu)9Cu3Sn4 P mmm,Pmm2,P 222 Ortho

Other Tatyanaite Information

References:

NAME( AmMin, Vol 85, p 1845) PHYS. PROP.(AmMin, Vol 85, p 1845) OPTIC PROP.(AmMin, Vol 85, p 1845)

See Also:

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

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Tatyanaite

(Pt,Pd,Cu)9Cu3Sn4
Dana No: 1.2.7.2 Strunz No: I/A.17-40
Locality:

Notes: