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Edgarite (Edgarit)

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Edgarit
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Edgarit
Bildbreite: 2 mm, Fundort: Kaskasnyunchorr, Khibiny, Kola, Russland
Copyright: Luigi Chiappino; Contribution: thdun5
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Kaskasnyunchorr
Mineral: Edgarite
Image: 1296327869
License: Usage for Mineralienatlas project only
Edgarit

Bildbreite: 2 mm, Fundort: Kaskasnyunchorr, Khibiny, Kola, Russland
Copyright: Luigi Chiappino
Contribution: thdun5 2011-01-29
Locality: Kaskasnyunchorr / Chibiny (Khibiny) / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Color vergleichbar zu Molybdänit
Hardness (Mohs) 3.75
Cleavages vollkommen {001}
Crystal System hexagonal, P63

Chemism

Chemical formula

FeNb3+2Nb4+S6

Chemical composition

Eisen, Niob, Schwefel

Unit weight: 526.957346 u; Number of atoms in the formula: 10

Info

Empirical formula:

FeNb2NbS6

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Sulfur

S

36.51

6

60.00

32.0655000

192.3930000
Iron

Fe

10.60

1

10.00

55.8452000

55.8452000
Niobium

Nb

52.89

3

30.00

92.9063820

278.7191460

Analysis wt%

Nb : 52.87, Fe : 10.12, S : 35.86 (Ref: Contributions to Mineralogy and Petrology 2000)

Strunz 9th edition incl. updates

2.DB.25

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfoarsenide, Sulfoantimonide, Sulfobismuthide)
D: Metallsulfide mit M:S = 3:4 und 2:3
B: M:S = 2:3
25:Edgarit-Gruppe

Lapis Classification

II/D.07-020

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
D: Sulfide mit Metall : S,Se,Te < 1:1

Classification by Hölzel

2.DB.400

2: SULFIDES
D: With Me/S <1/1 and >1/2
B: Me/S=2/3

Dana 8th edition

02.11.13.01

02: Sulfide Minerals
11: Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=2:3

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

vergleichbar zu Molybdänit

Diaphaneity (Transparency)

opak

Crystallography

Crystal System

hexagonal

Class (H-M)

6

Space Group number

173

Space Group

P63

Cell parameters a (Å)

5.912(1)

Cell parameters b (Å)

-

Cell parameters c (Å)

12.675(2)

Cell parameters a/b or c/a

2.144

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

2

Volume (ų)

383.661

X-Ray Powder Diffraction

6.11(80),
3.04(60),
2.606(80),
2.096(100),
1.665(80),
1.524(60),
1.126(70),
1.027(60)
XRD chart Edgarite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

3.75

VHN (Hardness Vickers)

170 (5/10g)

Density (g/cm³)

4.99 (berechnet)

4.561 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {001}

(Co-)Type locality

(Co-)Type locality

Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Kaskasnyunchorr

Preface

Author (Name, Year)

Barkov & Martin & Men'shikov & Savchenko & Thibault & Laajoki, 2000

Bindi & Martin: Edgarite, FeNb3S6, from the Khibina Alkaline Complex, Russia: solution of the crystal structure. The Canadian Mineralogist, 56, 2018, pp. 259-264

References

Contributions to Mineralogy and Petrology 138 (2000), 229

Other languages

German

Edgarit

Spanish

Edgarita

French

Edgarite

English

Edgarite

Russian

Эдгарит

Japanese

ｴﾄﾞｶﾞﾗｲﾄ

CNMNC (IMA)-Number

IMA 1995-017

CNMNC symbol

Symbol

Edg

Locations with GPS information

IDs

GUSID (Global unique identifier short form) EnOTZuENT0qHsdPsfuyXGA
GUID (Global unique identifier) 66937312-0DE1-4A4F-87B1-D3EC7EEC9718
Database ID 1000