Clausthalite Mineral Data

Clausthalite Mineral Data

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General Clausthalite Information

Chemical Formula:

PbSe

Composition:

Molecular Weight = 286.16 gm

Lead 72.41 % Pb

Selenium 27.59 % Se

______

100.00 %

Empirical Formula:

PbSe

Environment:

Associated with low-sulfur hydrothermal deposits with other selenides.

IMA Status:

Valid Species (Pre-IMA) 1832

Locality:

Lorenz Mine near Clausthal, Harz, Germany. Link to MinDat.org Location Data.

Name Origin:

Named after its locality.

Synonym:

ICSD 38294

Lerbachite

PDF 6-354

Tilkerodite

Zorgite

Clausthalite Image

Images:

Clausthalite

Comments: black massive and botryoidal clausthalite on matrix.
Location: Lasovice, Mittelbuhmen, Stredocesky, Czech Republic. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Clausthalite Schlemaite 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

Clausthalite Crystallography

Cell Dimensions:

a = 6.147, Z = 4; V = 232.27 Den(Calc)= 8.18

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F m3m

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

By Intensity(I/I_o): 3.06(1), 2.165(0.7), 3.54(0.3),

Crystal Structure:

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Ramsdell L S , American Mineralogist , 10 (1925) p.281-304, The crystal structures of some metallic sulfides

View Additional jPOWD Structure files for Clausthalite
[1]

Physical Properties of Clausthalite

Cleavage:

[001] Perfect, [010] Perfect, [100] Perfect

Color:

Lead gray, Blue gray, Grayish black.

Density:

7.6 - 8.8, Average = 8.19

Diaphaniety:

Opaque

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Hardness:

2.5 - Finger Nail

Luminescence:

None.

Luster:

Metallic

Magnetism:

Nonmagnetic

Streak:

grayish black

Optical Properties of Clausthalite

RL Color:

Galena-white with a grayish tinge.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Clausthalite in Air**
λ	R	∑ R(λ)
400 nm	62.00
420 nm	60.50
440 nm	59.00
460 nm	57.30
480 nm	55.60
500 nm	54.00
520 nm	52.60
540 nm	51.30
560 nm	50.20
580 nm	49.20
600 nm	48.40
620 nm	47.70
640 nm	47.30
660 nm	47.00
680 nm	47.00
700 nm	47.20

**Calculated Relative Intensity Colors of Clausthalite in Air**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%	160%	180%
R

Calculated Properties of Clausthalite

Electron Density:

r_electron=6.63 gm/cc
note: r_Clausthalite=8.18 gm/cc.

Fermion Index

Fermion Index = 0.18099
Boson Index = 0.81901

Photoelectric:

PE_Clausthalite=1,394.86 barns/electron
U=PE_Clausthalite x r_electron=9,250.43 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Clausthalite is Not Radioactive

Clausthalite Classification

Dana Class:

2.8.1.2 (2)Sulfides - Including Selenides and Tellurides

(2.8)where Am Bn Xp, with (m+n):p=1:1

(2.8.1)Galena Group (Isometric: Fm3m)

2.8.1.1 Galena PbS F m3m 4/m 3 2/m

2.8.1.2 Clausthalite PbSe F m3m 4/m 3 2/m

2.8.1.3 Altaite PbTe F m3m 4/m 3 2/m

2.8.1.4 Alabandite MnS F m3m 4/m 3 2/m

2.8.1.5 Oldhamite (Ca,Mg,Fe)S F m3m 4/m 3 2/m

2.8.1.6 Niningerite (Mg,Fe,Mn)S F m3m 4/m 3 2/m

2.8.1.7 Borovskite Pd3SbTe4 F m3m 4/m 3 2/m

2.8.1.8 Crerarite (Pt,Pb)Bi3(S,Se)4-x(x~0.7) F m3m 4/m 3 2/m

2.8.1.9 Keilite! (Fe,Mg)S F m3m 4/m 3 2/m

Strunz Class:

II/C.15-50 II - Sulfides and sulphosalts

II/C - Sulfides with metal: sulfur, selenium and tellurium = 1:1

II/C.15 - Galenite group

II/C.15-05 Keilite! (Fe,Mg)S F m3m 4/m 3 2/m

II/C.15-10 Niningerite (Mg,Fe,Mn)S F m3m 4/m 3 2/m

II/C.15-20 Oldhamite (Ca,Mg,Fe)S F m3m 4/m 3 2/m

II/C.15-30 Alabandite MnS F m3m 4/m 3 2/m

II/C.15-40 Galena PbS F m3m 4/m 3 2/m

II/C.15-50 Clausthalite PbSe F m3m 4/m 3 2/m

II/C.15-60 Altaite PbTe F m3m 4/m 3 2/m

II/C.15-70 Crerarite (Pt,Pb)Bi3(S,Se)4-x(x~0.7) F m3m 4/m 3 2/m

Other Clausthalite Information

References:

NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

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Clausthalite

PbSe
Dana No: 2.8.1.2 Strunz No: II/C.15-50
Locality:

Notes: