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Bursaite Mineral Data
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General Bursaite Information
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 Chemical Formula: |
Pb5Bi4S11 |
| Composition: |
Molecular Weight = 2,177.65 gm |
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Silver 0.99 % Ag |
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Bismuth 38.39 % Bi |
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Lead 44.72 % Pb |
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Sulfur 15.90 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Pb4.7Bi4Ag0.2S10.8 |
| Environment: |
In a contact metamorphic scheelite deposit. Bursaite (1955) is a mixture of two phases |
| IMA Status: |
Discredited IMA 2006 - Valid Species (Pre-IMA) 1955 |
| Locality: |
From Uludag, Bursa Province, Turkey. Link to MinDat.org Location Data. |
| Name Origin: |
For the locality in Bursa Province, Turkey. |
| Name Pronunciation: |
Bursaite  |
| Synonym: |
ICSD 24470 |
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PDF 25-431 |
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Bursaite Crystallography
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| Axial Ratios: |
a:b:c =0.3078:1:1.5331 |
| Cell Dimensions: |
a = 4.118, b = 13.376, c = 20.508, Z = 2; V = 1,129.63 Den(Calc)= 6.40 |
| Crystal System: |
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Bbmm |
| X Ray Diffraction: |
By Intensity(I/Io): 2.88(1), 2.05(0.9), 3.38(0.9), |
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Physical Properties of Bursaite
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| Cleavage: |
{???} Good |
| Color: |
Gray. |
| Density: |
6.2 |
| Diaphaneity: |
Opaque |
| Habit: |
Platy - Sheet forms (e.g. micas). |
| Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
| Habit: |
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite) |
| Hardness: |
2.5-3 - Finger Nail-Calcite |
| Luster: |
Metallic |
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Optical Properties of Bursaite
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| RL Anisotrophism: |
Strong, in gray-bluish and yellowish colors. |
| RL Color: |
White. |
| RL Pleochroism: |
Weak, white with blue tint to brown to light gray. |
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Calculated Properties of Bursaite
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| Electron Density: |
Bulk Density (Electron Density)=5.29 gm/cc
note: Specific Gravity of Bursaite =6.40 gm/cc.
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| Fermion Index: |
Fermion Index = 0.1
Boson Index = 0.9 |
| Photoelectric: |
PEBursaite =1,582.31 barns/electron
U=PEBursaite x rElectron Density=8,366.87 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bursaite is Not Radioactive |
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Bursaite Classification
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| Dana Class: |
03.04.15.02 (03)Sulfides - Sulfosalts |
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(03.04)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.04.15)Lillianite Group (Orthorhombic, AmBnS6 where A=Pb, Ag, Mn and B=Sb, Bi) |
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03.04.15.01 Lillianite Pb3Bi2S6 Bbmm 2/m 2/m 2/m |
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03.04.15.02 Bursaite? Pb5Bi4S11 Bbmm 2/m 2/m 2/m |
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03.04.15.03 Gustavite PbAgBi3S6(?) Bbmm 2/m 2/m 2/m |
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03.04.15.04 Andorite PbAgSb3S6 Pmma 2/m 2/m 2/m |
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03.04.15.05 Uchucchacuaite AgPb3MnSb5S12 P mmm 2/m 2/m 2/m |
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03.04.15.06 Ramdohrite Ag3Pb6Sb11S24 P 2/n 2/m |
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03.04.15.07 Roshchinite Ag19Pb10Sb51S96orPb(Ag,Cu)2(Sb,As)5S10 Pmna 2/m 2/m 2/m |
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03.04.15.08 Fizelyite Pb14Ag5Sb21S48(?) P 21/n 2/m |
| Strunz Class: |
02.JB.40a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.J - Sulfosalts of PbS Archetype |
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02.JB -Galena derivatives, with Pb |
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02.JB.40a Fizelyite Pb14Ag5Sb21S48(?) P 21/n 2/m |
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02.JB.40a Andorite PbAgSb3S6 Pmma 2/m 2/m 2/m |
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02.JB.40a Bursaite? Pb5Bi4S11 Bbmm 2/m 2/m 2/m |
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02.JB.40a Gustavite PbAgBi3S6(?) Bbmm 2/m 2/m 2/m |
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02.JB.40a Lillianite Pb3Bi2S6 Bbmm 2/m 2/m 2/m |
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02.JB.40a Roshchinite Ag19Pb10Sb51S96orPb(Ag,Cu)2(Sb,As)5S10 Pmna 2/m 2/m 2/m |
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02.JB.40a Uchucchacuaite AgPb3MnSb5S12 P mmm 2/m 2/m 2/m |
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02.JB.40a Ramdohrite Ag3Pb6Sb11S24 P 2/n 2/m |
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02.JB.40a Xilingolite Pb3Bi2S6 C 2/m 2/m |
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02.JB.40a Treasurite Ag7Pb6Bi15S32 B2/m 2/m |
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02.JB.40a Vikingite Ag5Pb8Bi13S30 C 2/m 2/m |
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Other Bursaite Information
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| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Bursaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
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Print or Cut-and-Paste your Bursaite Specimen Label here :
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Bursaite
Pb5Bi4S11
Dana No: 03.04.15.02 Strunz No: 02.JB.40a
Locality:
Notes:
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