Gustavite Mineral Data

Gustavite Mineral Data +

General Gustavite Information

Chemical Formula:

PbAgBi3S6 (?)

Composition:

Molecular Weight = 1,134.41 gm

Silver 9.51 % Ag

Bismuth 55.27 % Bi

Lead 18.27 % Pb

Sulfur 16.96 % S

______

100.00 %

Empirical Formula:

PbAgBi₃S₆

Environment:

A rare mineral of hydrothermal origin, also found in pegmatites.

IMA Status:

Approved IMA 1970

Locality:

Ivigtut, Greenland. Link to MinDat.org Location Data.

Name Origin:

Named for Gustav Hageman (1842-1916), Danish chemical engineer.

Synonym:

ICSD 300265

PDF 46-1367

Gustavite Image

Images:

Gustavite

Comments: Gray metallic gustavite in matrix.
Location: South Mountain, Owyhee County, Idaho, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gustavite Crystallography

Axial Ratios:

a:b:c =0.6946:1:0.211

Cell Dimensions:

a = 13.51, b = 19.449, c = 4.105, Z = 4; V = 1,078.61 Den(Calc)= 6.99

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Bbmm

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

By Intensity(I/I_o): 2.895(1), 2.996(1), 3.363(1),

Crystal Structure:

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Bente K , Engel M , Steins M , Zeitschrift fur Kristallographie , 205 (1993) p.327-328, Crystal structure of lead silver tribismuth sulfide, PbAgBi3S6, Locality: synthetic, Note: natural gustavite exhibits ordered Bi/Ag

Physical Properties of Gustavite

Cleavage:

[???] Distinct, [???] Distinct

Color:

Steel gray.

Density:

7.01

Diaphaniety:

Opaque

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

3.5 - Copper Penny

Luster:

Metallic

Streak:

gray

Optical Properties of Gustavite

RL Anisotrophism:

Weak in air, distinct in oil, bluish black to grayish white.

RL Color:

White to grayish white.

RL Pleochroism:

White to gray.

Calculated Properties of Gustavite

Electron Density:

r_electron=5.84 gm/cc
note: r_Gustavite=6.99 gm/cc.

Fermion Index

Fermion Index = 0.04163
Boson Index = 0.95837

Photoelectric:

PE_Gustavite=1,426.78 barns/electron
U=PE_Gustavite x r_electron=8,334.41 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Gustavite is Not Radioactive

Gustavite Classification

Dana Class:

3.4.15.3 (3)Sulfides - Sulfosalts

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

(3.4.15)Lillianite Group (Orthorhombic, AmBnS6 where A=Pb, Ag, Mn and B=Sb, Bi)

3.4.15.1 Lillianite Pb3Bi2S6 Bbmm 2/m 2/m 2/m

3.4.15.2 Bursaite Pb5Bi4S11 Bbmm 2/m 2/m 2/m

3.4.15.3 Gustavite PbAgBi3S6(?) Bbmm 2/m 2/m 2/m

3.4.15.4 Andorite PbAgSb3S6 Pmma 2/m 2/m 2/m

3.4.15.5 Uchucchacuaite AgPb3MnSb5S12 P mmm 2/m 2/m 2/m

3.4.15.6 Ramdohrite Ag3Pb6Sb11S24 P 2/n 2/m

3.4.15.7 Roshchinite Ag19Pb10Sb51S96orPb(Ag,Cu)2(Sb,As)5S10 Pmna 2/m 2/m 2/m

3.4.15.8 Fizelyite Pb14Ag5Sb21S48(?) P 2₁/n 2/m

Strunz Class:

II/E.31-90 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 Gustavite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Gustavite :
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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Gustavite

PbAgBi3S6 (?)
Dana No: 3.4.15.3 Strunz No: II/E.31-90
Locality:

Notes: