Schlemaite Mineral Data

General Schlemaite Information

Chemical Formula:

(Cu,[ ])6(Pb,Bi)Se4

Composition:

Molecular Weight = 824.04 gm

Copper 43.57 % Cu

Silver 2.88 % Ag

Bismuth 10.14 % Bi

Lead 4.02 % Pb

Selenium 39.38 % Se

______

100.00 %

Empirical Formula:

Cu_5.65Ag_0.22Pb_0.16Bi_0.4Se_4.11

Environment:

Occurs with other selenide minerals in the ore zone at the "tiber" dike, -855-m level, block 5128, main shaft # 371. Close to structural similarity with furutobeite.

IMA Status:

Approved IMA 2003 (Dana # Added)

Locality:

Niederschlema-Alberoda vein-type uranium depost at Hartensein, Erzgebirge, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for the Schlema-Alberoda ore field in the ancient mining region of Saxony, Germany

Synonym:

IMA2003-026

Schlemaite Image

Images:

Schlemaite Clausthalite Eucairite

Comments: Reflected-light digital-image of the intermixed schlemaite grain in type sample F2, from which the reflectance, crystallographic and crystal-structure data were obtained. (CanMin, v 41, p 1435).
Location: "Tiber" dike, -855-m level, block 5128, main shaft # 371, Niederschlema-Alberoda vein-type uranium depost at Hartensein, Erzgebirge, Germany. Scale: See Picture.
© Canadian Mineralogist

Schlemaite Crystallography

Axial Ratios:

a:b:c =2.3251:1:2.5008

Cell Dimensions:

a = 9.5341, b = 4.1004, c = 10.2546, Z = 2; beta = 100.066° V = 394.72 Den(Calc)= 6.93

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.132(1)(112), 3.189(1)(012), 2.058(0.8)(020),2.601(0.7)(113), 2.151(0.6)(014), 1.909(0.5)(314), 2.505(0.5)(311),

Physical Properties of Schlemaite

Cleavage:

None

Color:

Black, Silvery gray.

Diaphaneity:

Opaque

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Intergrown Crystals - Occurs as intergrown crystalline aggregates

Hardness:

3 - Calcite

Luster:

Metallic

Streak:

black

Optical Properties of Schlemaite

RL Anisotrophism:

Very weak.

RL Bireflectance:

Very weak.

RL Color:

Gray with no internal reflections.

RL Pleochroism:

None.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Schlemaite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	35.30	36.20
420 nm	36.10	37.10
440 nm	36.30	37.65
460 nm	36.60	38.00
470 nm	36.60	38.10
480 nm	36.60	38.10
500 nm	36.50	38.10
520 nm	36.40	38.10
540 nm	36.50	38.10
546 nm	36.45	38.10
560 nm	36.40	38.20
580 nm	36.55	38.20
589 nm	36.60	38.30
600 nm	36.70	38.35
620 nm	36.70	38.40
640 nm	36.70	38.50
650 nm	36.60	38.50
660 nm	36.60	38.40
680 nm	36.70	38.40
700 nm	36.40	38.50

**Standardized Intensity (100%) Reflection Spectra of Schlemaite in Oil**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	20.60	21.70
420 nm	20.90	22.30
440 nm	21.10	22.70
460 nm	21.10	23.00
470 nm	21.10	23.00
480 nm	21.05	23.10
500 nm	20.80	22.90
520 nm	20.70	22.80
540 nm	20.70	22.80
546 nm	20.70	22.80
560 nm	20.70	22.80
580 nm	20.90	22.90
589 nm	20.95	22.90
600 nm	21.00	23.10
620 nm	21.10	23.10
640 nm	21.00	23.20
650 nm	21.00	23.20
660 nm	21.10	23.20
680 nm	21.10	23.20
700 nm	21.00	23.40

**Calculated Relative Intensity Colors of Schlemaite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	240%	250%
R₁
R₂

**Calculated Relative Intensity Colors of Schlemaite in Oil**
Relative Intensity	0%	50%	100%	150%	200%	250%	300%	350%	400%	420%
R₁
R₂

Calculated Properties of Schlemaite

Electron Density:

Bulk Density (Electron Density)=6.06 gm/cc
note: Specific Gravity of Schlemaite =6.93 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Schlemaite= 317.38 barns/electron
U=PE_Schlemaite x rElectron Density=1,923.08 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Schlemaite is Not Radioactive

Schlemaite Classification

Dana Class:

02.16.12.02 (02)Sulfides - Including Selenides and Tellurides

(02.16)with miscellaneous formulae

(02.16.12)Dana Group

02.16.12.01 Furutobeite (Cu,Ag)6PbS4 Cm ? m

02.16.12.02 Schlemaite! (Cu,[])6(Pb,Bi)Se4 P 2₁/m 2/m

Strunz Class:

02.BE.25 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.B - Metal Sulfides, M:S > 1:1 (mainly 2:1)

02.BE -With Pb(Bi)

02.BE.25 Schlemaite! (Cu,[])6(Pb,Bi)Se4 P 2₁/m 2/m

Other Schlemaite Information

References:

NAME( CanMin, v 41, p 1433) PHYS. PROP.(CanMin, v 41, p 1433) OPTIC PROP.(CanMin, v 41, p 1433)

See Also:

Links to other databases for Schlemaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Schlemaite

(Cu,[ ])6(Pb,Bi)Se4
Dana No: 02.16.12.02 Strunz No: 02.BE.25
Locality:

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