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Gillulyite

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Lulu cut, South Mercur Pit, Mercur District (Camp Floyd District), Oquirrh Mts, Tooele Co., Utah, USA
© Brent Thorne

Formula:
Tl
 
2
(As,Sb)
 
8
S
 
13
System:MonoclinicHardness:2 - 2½
This page provides mineralogical data about Gillulyite.

Classification of Gillulyite

IMA status:Approved
Strunz 8th edition ID:2/E.14-25
Nickel-Strunz 10th (pending) edition ID:2.JC.10

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
J : Sulfosalts of PbS archetype
C : Galena derivatives, with Tl
Dana 8th edition ID:3.8.9.1

3 : SULFOSALTS
8 : 1 < ø < 2
Hey's CIM Ref.:5.5.12

5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
5 : Sulpharsenites etc. of Tl
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Type Occurrence of Gillulyite

Type Locality:Lulu cut, South Mercur Pit, Mercur District (Camp Floyd District), Oquirrh Mts, Tooele Co., Utah, USA
Year of Discovery:1991

Physical Properties of Gillulyite

Hardness (Mohs):2 - 2½

Crystallography of Gillulyite

Crystal System:Monoclinic
Cell Parameters:a = 9.58Å, b = 5.67Å, c = 21.5Å
β = 100.07°
Ratio:a:b:c = 1.69 : 1 : 3.792
Unit Cell Volume:V 1,149.86 ų (Calculated from Unit Cell)

Optical Data of Gillulyite

Type:Biaxial
Dispersion:relatively strong

Chemical Properties of Gillulyite

Formula:
Tl
 
2
(As,Sb)
 
8
S
 
13
Essential elements:As, S, Tl
All elements listed in formula:As, S, Sb, Tl

Relationship of Gillulyite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.JC.05Ellisite
Tl
 
3
AsS
 
3
2.JC.25eGalenobismutite
PbBi
 
2
S
 
4
2.JC.40aNakaseite
CuAg
 
3
Pb
 
4
Sb
 
12
S
 
24
Related Minerals - Hey's Index Grouping:

- +
5.5.1Lorándite
TlAsS
 
2
5.5.2Ellisite
Tl
 
3
AsS
 
3
5.5.3Imhofite
Tl
 
6
CuAs
 
16
S
 
40
5.5.4Simonite
TlHgAs
 
3
S
 
6
5.5.6Christite
TlHgAsS
 
3
5.5.6Routhierite
Tl(Cu,Ag)(Hg,Zn)
 
2
(As,Sb)
 
2
S
 
6
5.5.7Hutchinsonite
(Tl,Pb)
 
2
As
 
5
S
 
9
5.5.8Wallisite
(Cu,Ag)TlPbAs
 
2
S
 
5
5.5.9Bernardite
Tl(As,Sb)
 
5
S
 
8
5.5.10Vrbaite
Tl
 
4
Hg
 
3
Sb
 
2
As
 
8
S
 
20
5.5.11Rebulite
Tl
 
5
Sb
 
5
As
 
8
S
 
22
5.5.13Weissbergite
TlSbS
 
2
5.5.14Rohaite
(Tl,Pb,K)
 
2
Cu
 
8.7
Sb
 
2
S
 
4
5.5.15Vaughanite
TlHgSb
 
4
S
 
7
5.5.16Chalcothallite
Tl
 
2
(Cu,Fe)
 
6
SbS
 
4
5.5.17Pierrotite
Tl
 
2
Sb
 
6
As
 
4
S
 
16
5.5.18Parapierrotite
Tl(Sb,As)
 
5
S
 
8
5.5.19Criddleite
TlAg
 
2
Au
 
3
Sb
 
10
S
 
10
5.5.20Chabournéite
Tl
 
21-x
Pb
 
2x
(Sb,As)
 
91-x
S
 
147
 (x = 0-17.5)

Other Names for Gillulyite

Synonyms:
IMA1989-029
Other Languages:
German:Gillulyit
Russian:Джиллюлиит
Spanish:Gillulyita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Gillulyite

Reference List:American Mineralogist: 76: 653-656.

American Mineralogist: 78: 1096-1103.

Internet Links for Gillulyite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Gillulyite in the Natural History Museum (London) online catalogue
  • Gillulyite details from Handbook of Mineralogy (PDF)
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    Localities for Gillulyite

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    USA
     
    • Utah
      • Tooele Co.
        • Oquirrh Mts
          • Mercur District (Camp Floyd District)
            • South Mercur Pit
    		American Mineralogist, Volume 76, pages 653-656, 1991
    Mineral and/or Locality
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