Galena Mineral Data

Galena Mineral Data +

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General Galena Information

Chemical Formula:

PbS

Composition:

Molecular Weight = 239.27 gm

Lead 86.60 % Pb

Sulfur 13.40 % S

______

100.00 %

Empirical Formula:

PbS

Environment:

Lead sulfide ore veins, and disseminated in igneous and sedimentary rocks.

IMA Status:

Valid Species (Pre-IMA) Prehistoric

Locality:

Joplin district of Missouri, Kansas, and Oklahoma and other world wide occurrences. Link to MinDat.org Location Data.

Name Origin:

The Roman naturalist, Pliny, used the name galena to describe lead ore.

Synonym:

Blue Lead

ICSD 38293

Lead Glance

PDF 5-592

Galena Image

Images:

Galena

Comments: Galena on pyrrhotite. The crystals of galena reach to 1.5 cm across. All are cubic with octahedral modifications.
Location: Dal'Negorsk, Russia. Scale: 8x10 cm.
© John Veevaert

Images:

Galena Plumbojarosite

Comments: Yellow, earthy plumbojarosite on massive, gray galena.
Location: Quarry No 3, K?nigshain, Oberlausitz, Saxony, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Galena Crystallography

Cell Dimensions:

a = 5.936, Z = 4; V = 209.16 Den(Calc)= 7.60

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): 2.969(1), 3.429(0.84), 2.099(0.57),

Forms:

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Forms: [ 1 0 0] [ 1 1 1]

Warning: this large pop-up is very compute intensive and may not work well with some computers.

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 Galena
[1]

Physical Properties of Galena

Cleavage:

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

Color:

Light lead gray, Dark lead gray.

Density:

7.2 - 7.6, Average = 7.4

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:

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

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

2.5 - Finger Nail

Luminescence:

None.

Luster:

Metallic

Magnetism:

Nonmagnetic

Streak:

grayish black

Optical Properties of Galena

RL Color:

White.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Galena in Air**
λ	R	∑ R(λ)
400 nm	52.80
420 nm	50.50
440 nm	48.20
460 nm	46.40
480 nm	45.00
500 nm	43.90
520 nm	43.00
540 nm	42.40
560 nm	41.90
580 nm	41.60
600 nm	41.50
620 nm	41.60
640 nm	41.80
660 nm	41.90
680 nm	42.10
700 nm	42.20

**Calculated Relative Intensity Colors of Galena in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%
R

Calculated Properties of Galena

Electron Density:

r_electron=6.23 gm/cc
note: r_Galena=7.60 gm/cc.

Fermion Index

Fermion Index = 0.19238
Boson Index = 0.80762

Photoelectric:

PE_Galena=1,623.65 barns/electron
U=PE_Galena x r_electron=10108.40 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Galena is Not Radioactive

Galena Classification

Dana Class:

2.8.1.1 (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.15-40 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 Galena Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

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Galena

PbS
Dana No: 2.8.1.1 Strunz No: II/C.15-40
Locality:

Notes: