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Lenaite

Collectors Summary

Color grau
Streak color dunkelgrau
Hardness (Mohs) 4.5
Cleavages keine
Crystal System tetragonal, I42d

Chemism

Chemical formula

AgFeS2

Chemical composition

Eisen, Silber, Schwefel

Unit weight: 227.84442 u; Number of atoms in the formula: 4

Info

Empirical formula:

AgFeS2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Sulfur

S

28.15

2

50.00

32.0655000

64.1310000
Iron

Fe

24.51

1

25.00

55.8452000

55.8452000
Silver

Ag

47.34

1

25.00

107.8682200

107.8682200

Analysis wt%

Ø Ag : 46.60, Fe : 24.10, S : 28.90 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 95)

Strunz 9th edition incl. updates

2.CB.10

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfoarsenide, Sulfoantimonide, Sulfobismuthide)
C: Metallsulfide, M : S = 1 : 1 (und ähnliche)
B: mit Zink (Zn), Eisen (Fe), Kupfer (Cu), Silber (Ag), usw.
10:Chalkopyrit-Gruppe

Lapis Classification

II/C.03-025

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
C: Sulfide mit Metall : S,Se,Te ~ 1:1
3: Chalkopyrit-Gruppe

Classification by Hölzel

2.CB.270

2: SULFIDES
C: Sulfides (etc) with Me/S=1/1
B: With Zn,Cu (etc), Coordination Number ~[4] Framework of Cornersharing Tetrahedra: Sphalerite-Germanite-Family
2: Chalcopyrite-Group

Dana 8th edition

02.09.01.05

02: Sulfide Minerals
09: Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=1:1
01: Chalcopyrite Group (Tetragonal: I-42d)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Chalcopyrite group

Optical Properties

Color

grau

Streak color

dunkelgrau

Diaphaneity (Transparency)

opak

Crystallography

Crystal System

tetragonal

Class (H-M)

42m

Space Group number

122

Space Group

I42d

Cell parameters a (Å)

5.64

Cell parameters b (Å)

-

Cell parameters c (Å)

10.34

Cell parameters a/b or c/a

1.833

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volume (ų)

328.911

X-Ray Powder Diffraction

3.137(100),
2.718(10),
1.922(20),
1.920(30),
1.639(20),
1.636(10),
1.246(10),
1.109(10)
XRD chart Lenaite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

4.5

VHN (Hardness Vickers)

310 (10g)

Density (g/cm³)

4.57

4.601 ( ρ calc. Mineralienatlas )

Cleavages

keine

Tenacity

nicht erwähnt

(Co-)Type locality

(Co-)Type locality

Russland/Ferner Osten, Föderationskreis/Sacha (Sakha, Jakutien, Якутия), Republik/Werchojansk (Verkhoyansk), Rajon/Khachakchan Erz-Cluster/Khachakchan Ag-Sb-Hg Lagerstätte

Preface

Author (Name, Year)

Amuzinsky & Zhdanov & Zayakina & Leskova, 1995

References

Strunz Mineralogical Tables 9. Edition.

Mineralogical Record 27: 464.

Amuzinskii, V.A., Zhdanov, Yu.Ya., Zayakina, N.V., and Leskova, N.V. (1995) Lenaite, AgFeS2, a new mineral species. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (1995): 124(5):85-91 (in Russian).

Bindi, L., Spry, P.G., Pratesi, G. (2006): Lenaite from the Gies gold–silver telluride deposit, Judith Mountains, Montana, U.S.A.: occurrence, composition, and crystal structure. Canadian Mineralogist: 44: 207-212.

IMA group assignments

 
Chalcopyrite group
 
 
 

 
 
Chalcopyrite
CuFeS2
tetragonal
I42d

 
 
Eskebornite
CuFeSe2
tetragonal
P42c

 
 
Gallite
CuGaS2
tetragonal
I42d

 
 
Laforêtite
AgInS2
tetragonal
I42d

 
 
Lenaite
AgFeS2
tetragonal
I42d

 
 
Roquesite
CuInS2
tetragonal
I42d

 
 
Shenzhuangite
NiFeS2
tetragonal
I42d

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Actuality: 24. Apr 2025 - 04:51:52

Other languages

German

Lenait

French

Lenaite

English

Lenaite

Spanish

Lenaíta

Russian

Ленаит

CNMNC (IMA)-Number

IMA 1994-008

CNMNC symbol

Symbol

Ln

Locations with GPS information

IDs

GUSID (Global unique identifier short form) SXwDtHlOhkWD562KwZlPAQ
GUID (Global unique identifier) B4037C49-4E79-4586-83E7-AD8AC1994F01
Database ID 2178