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Gillulyite Mineral Data
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General Gillulyite Information
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 Chemical Formula: |
Tl2(As,Sb)8S13 |
| Composition: |
Molecular Weight = 1,518.65 gm |
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Thallium 26.92 % Tl |
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Antimony 16.03 % Sb |
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Arsenic 29.60 % As |
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Sulfur 27.45 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Tl2As6Sb2S13 |
| Environment: |
Found in vuggy masses of barite, in barite and calcite veins, and in the silty, carbonaceous limestone host. |
| IMA Status: |
Approved IMA 1991 |
| Locality: |
Mercury gold deposit, Tooele County, Utah, USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named in honor of the late James C. Gilluly, United States Geological Survey. |
| Name Pronunciation: |
Gillulyite + Pronunciation  |
| Synonym: |
ICSD 80119 |
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IMA1989-029 |
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PDF 46-1444 |
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Gillulyite Image |
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Images:
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Gillulyite Crystallography
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| Axial Ratios: |
a:b:c =1.6876:1:3.786 |
| Cell Dimensions: |
a = 9.584, b = 5.679, c = 21.501, Z = 2; beta = 100.07° V = 1,152.22 Den(Calc)= 4.38 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2/n |
| X Ray Diffraction: |
By Intensity(I/Io): 2.814(1), 3.077(1), 3.63(0.9), |
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Physical Properties of Gillulyite
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| Cleavage: |
{???} Perfect |
| Color: |
Red, Maroon, Dark red, Blue. |
| Density: |
4.022 |
| Diaphaneity: |
Translucent |
| Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
| Hardness: |
2-2.5 - Gypsum-Finger Nail |
| Luster: |
Sub Metallic |
| Streak: |
red |
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Optical Properties of Gillulyite
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| Optical Data: |
Biaxial (?), b=2.81 |
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Calculated Properties of Gillulyite
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| Electron Density: |
Bulk Density (Electron Density)=3.86 gm/cc
note: Specific Gravity of Gillulyite =4.38 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0020586879
Boson Index = 0.9979413121 |
| Photoelectric: |
PEGillulyite = 525.41 barns/electron
U=PEGillulyite x rElectron Density=2,030.55 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gillulyite is Not Radioactive |
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Gillulyite Classification
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| Dana Class: |
03.08.09.01 (03)Sulfides - Sulfosalts |
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(03.08)where 1 < z/y <2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.08.09)Dana Group |
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03.08.09.01 Gillulyite Tl2(As,Sb)8S13 P 2/n 2/m |
| Strunz Class: |
02.JC.10 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.JC -Galena derivatives, with Tl |
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02.JC.10 Gillulyite Tl2(As,Sb)8S13 P 2/n 2/m |
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Other Gillulyite Information
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| References: |
PHYS. PROP.(Am.Min.,Vol.76,p653-656,1991) OPTIC PROP.(Am.Min.,Vol.76,p653-656,1991) |
| See Also: |
Links to other databases for Gillulyite :
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
15 - WWW-MINCRYST
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Print or Cut-and-Paste your Gillulyite Specimen Label here :
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Gillulyite
Tl2(As,Sb)8S13
Dana No: 03.08.09.01 Strunz No: 02.JC.10
Locality:
Notes:
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