Xilingolite Mineral Data

Xilingolite Mineral Data +

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General Xilingolite Information

Chemical Formula:

Pb3Bi2S6

Composition:

Molecular Weight = 1,231.96 gm

Bismuth 33.93 % Bi

Lead 50.46 % Pb

Sulfur 15.62 % S

______

100.00 %

Empirical Formula:

Pb₃Bi₂S₆

Environment:

Dimorphous with lillianite.

IMA Status:

Approved IMA 1982

Locality:

Chaobuleng district, Xilingola League, Inner Mongolia, China. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Xilingolite Image

Images:

Xilingolite

Comments: Elongate and striated crystal of xilingolite, roughly 2 mm long, on galena showing an octahedral cleavage, together with quartz. (CanMin, v 39, p 1665).
Location: Found on dumps excavated during tunnel construction between Mittal and Hohtenn in Valais, Switzerland. Scale: Picture Size 4 mm.
© Canadian Mineralogist

Xilingolite Crystallography

Axial Ratios:

a:b:c =3.3074:1:5.0548

Cell Dimensions:

a = 13.511, b = 4.085, c = 20.649, Z = 4; beta = 92.15° V = 1,138.87 Den(Calc)= 7.18

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

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

By Intensity(I/I_o): 3.38(1), 2.177(0.9), 2.073(0.8),

Crystal Structure:

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Berlepsch P , Armbruster T , Makovicky E , Hejny C , Topa D , Graeser S , The Canadian Mineralogist , 39 (2001) p.1653-1663, The crystal structure of (001) twinned xilingolite, Pb3Bi2S6,, from Mittal-Hohtenn, Valais, Switzerland, Locality: Mittal-Hohtenn, Valais, Switzerland

Physical Properties of Xilingolite

Color:

Lead gray.

Density:

7.08

Diaphaniety:

Opaque

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

3 - Calcite

Luster:

Metallic

Streak:

gray

Optical Properties of Xilingolite

RL Anisotrophism:

Distinct, dark gray to brown.

RL Color:

White with a faint blue tint.

RL Pleochroism:

Distinct, white to white with blue tint.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Xilingolite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
405 nm	43.20	46.60
436 nm	44.50	46.80
480 nm	44.30	46.80
526 nm	44.20	44.90
546 nm	41.80	44.50
578 nm	41.40	44.10
589 nm	40.90	43.80
622 nm	40.50	43.30
644 nm	40.00	43.00
656 nm	39.90	43.00
664 nm	39.80	43.00

**Calculated Relative Intensity Colors of Xilingolite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	220%
R₁
R₂

Calculated Properties of Xilingolite

Electron Density:

r_electron=5.92 gm/cc
note: r_Xilingolite=7.18 gm/cc.

Fermion Index

Fermion Index = 0.11268
Boson Index = 0.88732

Photoelectric:

PE_Xilingolite=1,602.20 barns/electron
U=PE_Xilingolite x r_electron=9,487.21 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Xilingolite is Not Radioactive

Xilingolite Classification

Dana Class:

3.4.16.1 (3)Sulfides - Sulfosalts

(3.4)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(3.4.16)Dana Group

3.4.16.1 Xilingolite Pb3Bi2S6 C 2/m 2/m

Strunz Class:

II/E.31-10 II - Sulfides and sulphosalts

II/E - Sulfosalts (S : As,Sb,Bi = x) Lead-Sulfosalts (Pb-Cu/Ag) with predominant Vismut x = 6.0 - 1.6

II/E.31 - Xilingolite - Gustavite series

II/E.31-10 Xilingolite Pb3Bi2S6 C 2/m 2/m

II/E.31-20 Lillianite Pb3Bi2S6 Bbmm 2/m 2/m 2/m

II/E.31-30 Bursaite Pb5Bi4S11 Bbmm 2/m 2/m 2/m

II/E.31-40 Ourayite Pb4Ag3Bi5S13 Bbmm 2/m 2/m 2/m

II/E.31-50 Eskimoite Ag7Pb10Bi15S36 Am m

II/E.31-60 Vikingite Ag5Pb8Bi13S30 C 2/m 2/m

II/E.31-70 Schirmerite Ag3Pb3Bi9S18toAg3Pb6Bi7S18 Bbmm 2/m 2/m 2/m

II/E.31-80 Treasurite Ag7Pb6Bi15S32 B2/m 2/m

II/E.31-90 Gustavite PbAgBi3S6(?) Bbmm 2/m 2/m 2/m

Other Xilingolite Information

References:

NAME( Dana8) PHYS. PROP.(AmMin, Vol 87, p 1513) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Xilingolite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Print or Cut-and-Paste your Xilingolite Specimen Label here :

Xilingolite

Pb3Bi2S6
Dana No: 3.4.16.1 Strunz No: II/E.31-10
Locality:

Notes: