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Lenaite

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Privol'noye mine, Saha Republic (Sakha Republic; Yakutia), Eastern-Siberian Region, Russia
© 2008, JGW

Formula:
AgFeS
 
2
System:TetragonalColour:Steel Grey
Lustre:MetallicHardness:4½
Name:For the river Lena, Russia


Chalcopyrite Group.

Classification of Lenaite

IMA status:Approved
Strunz 8th edition ID:2/C.03-25
Nickel-Strunz 10th (pending) edition ID:2.CB.10a

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
B : With Zn, Fe, Cu, Ag, etc.
Dana 8th edition ID:2.9.1.5

2 : SULFIDES
9 : AmBnXp, with (m+n):p = 1:1
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Type Occurrence of Lenaite

Type Locality:Khachakchan Ag-Sb-Hg deposit, Khachakchan ore cluster, Verkhoyansk Silver Province, Verkhoyansk Fold Belt, Saha Republic (Sakha Republic; Yakutia), Eastern-Siberian Region, Russia

Physical Properties of Lenaite

Lustre:Metallic
Colour:Steel Grey
Streak:Dark grey to black
Hardness (Mohs):4½
Hardness (Vickers):VHN10=285 kg/mm2

Crystallography of Lenaite

Crystal System:Tetragonal
Class (H-M):4 2m - Scalenohedral
Space Group:I4 2d
Cell Parameters:a = 5.4371Å, c = 10.8479Å
Ratio:a:c = 1 : 1.995
Unit Cell Volume:V 320.69 ų
Z:4

Optical Data of Lenaite

Type:Anisotropic
Anisotropism:moderate, in yellowish tints
Bireflectance:None
Reflectivity:
471.1 nmR1=28.2%R2= 30.6%
548.3 nmR1=31.8%R2= 35.8%
586.6 nmR1=32.8%R2= 36.5%
652.3 nmR1=30.9%R2= 35.0%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 36.5%.
R1 shown in black, R2 shown in red
Colour in reflected light:Greyish white
Pleochroism:Non-pleochroic

Chemical Properties of Lenaite

Formula:
AgFeS
 
2
Essential elements:Ag, Fe, S
All elements listed in formula:Ag, Fe, S

Relationship of Lenaite to other Species

Member of Group:
Chalcopyrite Group:
ABX
 
2
Related Minerals - Nickel-Strunz Grouping):

- +
2.CB.05aColoradoite
HgTe
2.CB.05aHawleyite
CdS
2.CB.05aMetacinnabar
HgS
2.CB.05cPolhemusite
(Zn,Hg)S
2.CB.05bSakuraiite
(Cu,Zn,Fe)
 
3
(In,Sn)S
 
4
2.CB.05aSphalerite
(Zn,Fe
2+
 
)S
2.CB.05aStilleite
ZnSe
2.CB.05aTiemannite
HgSe
2.CB.05UM1998-15-S:CuFeZn
Cu
 
2
Fe
 
3
Zn
 
5
S
 
10
2.CB.05aRudashevskyite
(Fe,Zn)S
2.CB.10aChalcopyrite
CuFeS
 
2
2.CB.10aEskebornite
CuFeSe
 
2
2.CB.10aGallite
CuGaS
 
2
2.CB.10bHaycockite
Cu
 
4
Fe
 
5
S
 
8
2.CB.10bMooihoekite
Cu
 
9
Fe
 
9
S
 
16
2.CB.10bPutoranite
Cu
 
9
(Fe,Ni)
 
9
S
 
16
2.CB.10aRoquesite
CuInS
 
2
2.CB.10bTalnakhite
Cu
 
9
(Fe,Ni)
 
8
S
 
16
2.CB.10aLaforêtite
AgInS
 
2
2.CB.15aČernýite
Cu
 
2
(Cd,Zn,Fe)SnS
 
4
2.CB.15aFerrokësterite
Cu
 
2
(Fe,Zn)SnS
 
4
2.CB.15aHocartite
Ag
 
2
(Fe
2+
 
,Zn)SnS
 
4
2.CB.15aIdaite
Cu
 
5
FeS
 
6
2.CB.15aKësterite
Cu
 
2
(Zn,Fe)SnS
 
4
2.CB.15aKuramite
Cu
 
3
SnS
 
4
2.CB.15bMohite
Cu
 
2
SnS
 
3
2.CB.15aPirquitasite
Ag
 
2
ZnSnS
 
4
2.CB.15aStannite
Cu
 
2
(Fe,Zn)SnS
 
4
2.CB.15cStannoidite
Cu
+
6
Cu
2+
2
(Fe
2+
 
,Zn)
 
3
Sn
 
2
S
 
12
2.CB.15aVelikite
(Cu,Hg)
 
11
Sn
 
4
S
 
16
2.CB.15cUM2006-11-S:CuFeGeZn
Cu
 
8
(Fe,Zn)
 
3
Ge
 
2
S
 
12
 (?)
2.CB.20Chatkalite
Cu
 
6
FeSn
 
2
S
 
8
2.CB.20Mawsonite
Cu
 
6
Fe
 
2
SnS
 
8
2.CB.30Colusite
Cu
 
26
V
 
2
(As,Sn,Sb)
 
6
S
 
32
2.CB.30Germanite
Cu
 
13
Fe
 
2
Ge
 
2
S
 
16
2.CB.30Germanocolusite
Cu
 
26
V
 
2
(Ge,As)
 
6
S
 
32
2.CB.30Nekrasovite
Cu
 
26
V
 
2
(Sn,As,Sb)
 
6
S
 
32
2.CB.30Stibiocolusite
Cu
 
13
V
 
4
(Sb,Sn,As)
 
3
S
 
16
2.CB.30Ovamboite
Cu
 
20
(Fe,Cu,Zn)
 
6
W
 
2
Ge
 
6
S
 
32
2.CB.30Maikainite
Cu
 
20
(Fe,Cu)
 
6
Mo
 
2
Ge
 
6
S
 
32
2.CB.35aHemusite
Cu
 
6
SnMoS
 
8
2.CB.35aKiddcreekite
Cu
 
6
SnWS
 
8
2.CB.35aPolkovicite
(Fe,Pb)
 
3
(Ge,Fe)
 
1-x
S
 
4
2.CB.35aRenierite
(Cu,Zn)
 
11
(Ge,As)
 
2
Fe
 
4
S
 
16
2.CB.35aVinciennite
Cu
+
7
Cu
2+
3
Fe
2+
2
Fe
3+
2
Sn(As,Sb)S
 
16
2.CB.35aMorozeviczite
(Pb,Fe)
 
3
Ge
 
1-x
S
 
4
2.CB.35bCatamarcaite
Cu
 
6
GeWS
 
8
2.CB.40Lautite
CuAsS
2.CB.45Cadmoselite
CdSe
2.CB.45Greenockite
CdS
2.CB.45Wurtzite
(Zn,Fe)S
2.CB.45Rambergite
MnS
2.CB.55aCubanite
CuFe
 
2
S
 
3
2.CB.55bIsocubanite
CuFe
 
2
S
 
3
2.CB.60Picotpaulite
TlFe
 
2
S
 
3
2.CB.60Raguinite
TlFeS
 
2
2.CB.65Argentopyrite
AgFe
 
2
S
 
3
2.CB.65Sternbergite
AgFe
 
2
S
 
3
2.CB.70Sulvanite
Cu
 
3
VS
 
4
2.CB.75Vulcanite
CuTe
2.CB.80Empressite
AgTe
2.CB.85Muthmannite
AuAgTe
 
2

Other Names for Lenaite

Synonyms:
IMA1994-008
Other Languages:
German:Lenait
Russian:Ленаит
Spanish:Lenaita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Lenaite

Reference List: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.

Internet Links for Lenaite

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  • Raman and XRD data at RRUFF project
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  • Lenaite details from Handbook of Mineralogy (PDF)
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    Localities for Lenaite

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Japan
     
    • Honshu Island
      • Tohoku Region
        • Yamagata Prefecture
    		Dr. Kameki Kinoshita collection (curated at Geological Survey of Japan)
    Russia
     
    • Eastern-Siberian Region
      • Saha Republic (Sakha Republic; Yakutia)
    		unpublished SEM/EDS analysis
        • Verkhoyansk Fold Belt
          • Verkhoyansk Silver Province
            • Khachakchan ore cluster
    		Amuzinskii et al (1995), Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 124(5): 85-91.; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Pavlova, G.G., and Borisenko, A.S. (2009): Ore Geology Reviews 35, 164-185.
    USA
     
    • Montana
      • Fergus Co.
        • Warm Springs District (Gilt Edge District; Gold Hill District; Maiden District)
          • Cone Butte Sub District
    		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
    Mineral and/or Locality
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