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Schlemaite

Formula:
(Cu,[])
 
6
(Pb,Bi)Se
 
4
System:MonoclinicColour:black
Hardness:3
Name:for the type locality, in the Schlema-Hartenstein District (Niederschlema-Alberoda mining area), Erzgebirge, Saxony, Germany.
This page provides mineralogical data about Schlemaite.

Classification of Schlemaite

IMA status:Approved 2003
Strunz 8th edition ID:2/0.0-
Nickel-Strunz 10th (pending) edition ID:2.BE.25

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
E : With Pb (Bi)
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Type Occurrence of Schlemaite

Type Locality:Shaft 371, Schlema-Hartenstein District, Erzgebirge, Saxony, Germany
General Appearance of Type Material:anhedral to subhedral grains, up to a few 100 µm in size
Geological Setting of type material:in hydrothermal Se-bearing dolomite-ankerite veins

Physical Properties of Schlemaite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:black
Streak:black
Hardness (Mohs):3
Hardness (Vickers):VHN25=106 kg/mm2
Hardness Data:Measured
Tenacity:Brittle
Cleavage:None Observed
Fracture:Irregular/Uneven
Density (calculated):7.54 g/cm3

Crystallography of Schlemaite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/m {P1 1 21/m} {P21/m} {P1 21/m 1}
Cell Parameters:a = 9.5341Å, b = 4.1004Å, c = 10.2546Å
β = 100.066°
Ratio:a:b:c = 2.325 : 1 : 2.501
Unit Cell Volume:V 394.72 ų
Z:2
X-Ray Powder Diffraction:
d-spacingIntensity
3.34(80)
3.17(60)
2.85(80)
2.69(80)
2.17(60)
2.10(70)
2.07(100)
Comments:From type description.

Chemical Properties of Schlemaite

Formula:
(Cu,[])
 
6
(Pb,Bi)Se
 
4
All elements listed in formula:Bi, Cu, Pb, Se
Empirical Formula:
(Cu
 
5.50
Ag
 
0.21
)(Pb
 
0.60
Bi
 
0.39
)Se
 
4

Relationship of Schlemaite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.BE.05Betekhtinite
Pb
 
2
(Cu,Fe)
 
21
S
 
15
2.BE.10Furutobeite
(Cu,Ag)
 
6
PbS
 
4
2.BE.15Rhodplumsite
Rh
 
3
Pb
 
2
S
 
2
2.BE.15Shandite
Ni
 
3
Pb
 
2
S
 
2
2.BE.20Parkerite
Ni
 
3
Bi
 
2
S
 
2
2.BE.30Pašavaite
Pd
 
3
Pb
 
2
Te
 
2

Other Names for Schlemaite

Synonyms:
IMA2003-026
Other Languages:
Russian:Шлемаит

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 Schlemaite

Reference List:Förster, H.-J.; Cooper,M.A.; Roberts, A.C.; Stanley, C.J.; Criddle, A.J.; Hawthorne, F.C.; Laflamme, J.H.G. & Tischendorf, G. (2003): Schlemaite, (Cu,[])6(Pb,Bi)Se4, a new mineral species from Niederschlema-Alberoda, Erzgebirge, Germany: Description and crystal structure.- Canadian Mineralogist 41, 1433-1444.

Internet Links for Schlemaite

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  • Raman and XRD data at RRUFF project
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    Localities for Schlemaite

    (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.
    Germany
     
    • Saxony
      • Erzgebirge
        • Schlema-Hartenstein District
    		FÖRSTER et al. (2003) Canadian Mineralogist 41, 1433-1444
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