Niggliite Mineral Data

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General Niggliite Information

Chemical Formula:

PtSn

Composition:

Molecular Weight = 313.79 gm

Tin 37.83 % Sn

Platinum 62.17 % Pt

______

100.00 %

Empirical Formula:

PtSn

Environment:

In late-forming hydrothermal veins.

IMA Status:

Valid Species (Pre-IMA) 1937

Locality:

Waterfall Gorge, Insizwa, Griqualand, South Africa. Link to MinDat.org Location Data.

Name Origin:

Named for Paul Niggli (1888-1953), Professor at Zurich, Switzerland.

Name Pronunciation:

Niggliite + Pronunciation

Synonym:

ICSD 42593

PDF 25-614

Niggliite Image

Images:

Niggliite Insizwaite

Comments: B&W image of a polished section showing insizwaite grain (I) showing details of niggliite (N) inclusions and exsolved chalcopyrite (C) lamellae in the pentlandite (P). (MinMag, v38:299).
Location: Insizwa deposit, Waterfall Gorge, Pondoland and East Griqualand areas (Transkei), South Africa. Scale: See Image.
© Mineralogical Magazine

Niggliite Crystallography

Axial Ratios:

a:c = 1:1.32473

Cell Dimensions:

a = 4.111, c = 5.446, Z = 2; V = 79.71 Den(Calc)= 13.07

Crystal System:

Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6₃/mmc

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

By Intensity(I/I_o): 1.486(1), 2.05(1), 2.15(1),

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: ideal nickel arsenide structure

Physical Properties of Niggliite

Cleavage:

None

Color:

Silver white.

Density:

13.44

Diaphaneity:

Opaque

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Hardness:

3 - Calcite

Luster:

Metallic

Optical Properties of Niggliite

RL Anisotrophism:

Very high, bright pinkish cream to very dark blue or black.

RL Color:

Silver white with a pinkish to bluish tint.

RL Pleochroism:

Strong, from pinkish cream to pale cobalt blue.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Niggliite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	52.40	55.00
420 nm	51.10	54.90
440 nm	49.80	54.80
460 nm	47.40	54.40
480 nm	46.60	55.00
500 nm	46.40	55.40
520 nm	45.80	55.90
540 nm	45.50	57.30
560 nm	45.40	58.90
580 nm	45.00	60.00
600 nm	44.30	62.00
620 nm	42.80	62.90
640 nm	41.10	64.40
660 nm	39.50	66.20
680 nm	37.70	67.20
700 nm	36.30	66.70

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

Calculated Properties of Niggliite

Electron Density:

Bulk Density (Electron Density)=10.7 gm/cc
note: Specific Gravity of Niggliite =13.1 gm/cc.

Fermion Index:

Fermion Index = 0.27
Boson Index = 0.73

Photoelectric:

PE_Niggliite=1,114.75 barns/electron
U=PE_Niggliite x rElectron Density=11886.51 barns/cc.

Radioactivity:

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

Niggliite Classification

Dana Class:

01.02.10.01 (01)Native Elements

(01.02)with platinum group metals and alloys

(01.02.10)Dana Group

01.02.10.01 Niggliite PtSn P 6₃/mmc 6/m 2/m 2/m

Strunz Class:

01.AG.60 01 - ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)

01.A - Metals and Intermetallic Alloys

01.AG -PGE-metal alloys

01.AG.60 Niggliite PtSn P 6₃/mmc 6/m 2/m 2/m

Other Niggliite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Niggliite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Niggliite

PtSn
Dana No: 01.02.10.01 Strunz No: 01.AG.60
Locality:

Notes: