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Melliniite (Melliniit)

Collectors Summary

Hardness (Mohs) 5.25
Cleavages keine
Fracture uneben
Crystal System kubisch, P213

Chemism

Chemical formula

(Ni,Fe)4P

Chemical composition

Eisen, Nickel, Phosphor

Unit weight: 262.8992212 u; Number of atoms in the formula: 5

Info

Empirical formula:

(Ni0.75Fe0.25)4P

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Phosphorus

P

11.78

1

20.00

30.9737612

30.9737612
Iron

Fe

21.24

1

20.00

55.8452000

55.8452000
Nickel

Ni

66.98

3

60.00

58.6934200

176.0802600

Analysis wt%

Fe : 34.90, Ni : 51.40, P : 12.40 (Ref: American Mineralogist 2006)

Strunz 9th edition incl. updates

1.BD.20

1: Elemente (Metalle, intermetallische Legierungen, Metalloide u. Nichtmetalle, Carbide, Silicide, Nitride u. Phosphide)
B: Metallische Kohlenstoffverbindungen (Carbide), Strickstoffverbindungen (Nitride) und Phosphorverbindungen (Phosphide)
D: Phosphide
20:Melliniit-Gruppe

Lapis Classification

I/A.11-040

I: ELEMENTE
A: Metalle und intermetallische Verbindungen
11: Carbide, Nitride, Phosphide und Silicide (metallartige Verbindungen)

Classification by Hölzel

1.BD.100

1: ELEMENTS
B: Carbides, Silicides, Phosphides, Nitrides
D: Phosphides

IMA status

anerkannt 2005

Mineral status

anerkanntes Mineral

Crystallography

Crystal System

kubisch

Class (H-M)

23

Space Group number

198

Space Group

P213

Cell parameters a (Å)

6.025

Cell parameters b (Å)

-

Cell parameters c (Å)

-

Cell parameters a/b or c/a

1

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volumne (ų)

218.711

X-Ray Powder Diffraction

2.694(15), 2.005(100), 1.906(60), 1.816(20), 1.420(10), 1.348(10), 1.182(15), 1.119(15)
XRD chart Melliniite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5.25

VHN (Hardness Vickers)

447 (500g)

Density (g/cm³)

7.88 (berechnet)

7.984 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

uneben

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

Marokko/Drâa-Tafilalet, Region/Errachidia (Er-Rachidia), Provinz/Arfoud, Cercle/Erfoud (Arfoud)/Meteorit NWA 1054

Preface

Author (Name, Year)

Pratesi & Bindi & Moggi-Cecchi, 2006

References

Moggi-Cecchi, V., Bindi, L., Pratesi, G.: "A new iron-nickel phosphide from the Northwest Africa 1054 Meteorite", 68th Annual Meteoritical Society Meeting, 5308 (2005);

Other languages

German

Melliniit

English

Melliniite

Russian

Меллиниит

CNMNC (IMA)-Number

IMA 2005-027

CNMNC symbol

Symbol

Mli

Locations with GPS information