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Nierite

Collectors Summary

Color farblos, bräunlichrot
Streak color weiß
Hardness (Mohs) 9
Solubility - Säuren
Crystal System trigonal, P31c

Chemism

Chemical formula

Si3N4

Chemical composition

Silicium, Stickstoff

Unit weight: 140.28347 u; Number of atoms in the formula: 7

Info

Empirical formula:

Si3N4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Nitrogen

N

39.94

4

57.14

14.0067200

56.0268800

Silicon

Si

60.06

3

42.86

28.0855300

84.2565900

Strunz 9th edition incl. updates

1.DB.05

1: Elemente (Metalle, intermetallische Legierungen, Metalloide u. Nichtmetalle, Carbide, Silicide, Nitride u. Phosphide)
D: Nichtmetallische Kohlenstoffverbindungen (Carbide) und Stickstoffverbindungen (Nitride)
B: Nichtmetallnitride
05:Nierit-Gruppe

Lapis Classification

I/A.10-045

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

Classification by Hölzel

1.BC.530

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

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos, bräunlichrot

Streak color

weiß

max. Birefringence

0.01

Birefringence chart\! Nierite title=Birefringence chart Nierite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

2.03

RI value γ / ε

2.02

Ri mean

2.027

2V angle

Uniaxial (-)

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

159

Space Group

P31c

Cell parameters a (Å)

7.74

Cell parameters b (Å)

-

Cell parameters c (Å)

5.61

Cell parameters a/b or c/a

0.725

Cell parameters c/b

-

Z

4

Volumne (ų)

291.055

X-Ray Powder Diffraction

4.310(80),
3.877(40),
2.883(100),
2.593(80),
2.538(100),
2.313(50),
2.080(40),
1.486(30)

XRD chart Nierite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

9

VHN (Hardness Vickers)

3650 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.11 (berechnet)

3.201 ( ρ calc. Mineralienatlas )

Instability

- Säuren

Preface

Author (Name, Year)

Lee & Russell & Arden & Pillinger, 1995

References

Meteoritics 30 (1995), 387

Other languages

German

Nierit

Spanish

Nierita

French

Nierite

English

Nierite

Russian

Ньерит

CNMNC (IMA)-Number

IMA 1994-032

CNMNC symbol

Symbol

Nr

Locations with GPS information