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Gillulyite

A valid IMA mineral species

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Gillulyite

Lulu Cut, South Mercur Pit, Mercur Mining District, Tooele County, Utah, USA

Gillulyite, etc.

Lulu Cut, South Mercur Pit, Mercur Mining District, Tooele County, Utah, USA

Gillulyite

Lulu Cut, South Mercur Pit, Mercur Mining District, Tooele County, Utah, USA

Gillulyite, etc.

Lulu Cut, South Mercur Pit, Mercur Mining District, Tooele County, Utah, USA

Gillulyite

Lulu Cut, South Mercur Pit, Mercur Mining District, Tooele County, Utah, USA

Gillulyite

Lulu Cut, South Mercur Pit, Mercur Mining District, Tooele County, Utah, USA

Gillulyite, etc.

Lulu Cut, South Mercur Pit, Mercur Mining District, Tooele County, Utah, USA

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About GillulyiteHide

James C. Gilluly

Formula:

Tl₂As_7.5Sb_0.3S₁₃

Colour:

Deep red

Lustre:

Adamantine

Hardness:

2 - 2½

Specific Gravity:

4.02

Crystal System:

Monoclinic

Name:

Named after USGS geologist James C. Gilluly (24 June 1896, Seattle, Washington, USA - 29 December 1980) for his contributions to the understanding of the fundamental geology of the Mercur, Ophir, and Stockton mining districts of Utah. [http://www.nasonline.org/publications/biographical-memoirs/memoir-pdfs/gilluly-james.pdf]

Type Locality:

ⓘ Lulu Cut, South Mercur Pit, Mercur Mining District, Tooele County, Utah, USA

OD structure; several possible polytypes have been proposed (Makovicky & Balić-Žunić, 1999).

Homeotypic with ambrinoite and gerstleyite.

Also compare jankovićite, rebulite, gillulyite, pierrotite; and gungerite.

Gillulyite is very light sensitive and to preserve the true color and luster must be stored in a dark container (http://www.mindat.org/forum.php?file,7,file=58644).

Unique IdentifiersHide

Mindat ID:

1694

Long-form identifier:

mindat:1:1:1694:6

Similar NamesHide

Galileiite

A valid IMA mineral species

Na₃Fe²⁺Fe₁₁²⁺(PO₄)₉

IMA Classification of GillulyiteHide

IMA status:

Approved

Approval year:

1991

First published:

1991

Type description reference:

Wilson, James R., Robinson, Paul D., Wilson, Paula N., Stanger, Larry W., Salmon, Gary L. (1991) Gillulyite, Tl₂(As,Sb)₈S₁₃, a new thallium arsenic sulfosalt from the Mercur gold deposit, Utah. American Mineralogist, 76 (3-4) 653-656

Classification of GillulyiteHide

Strunz-mindat (2026):

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 ed.:

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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Symbol	Source	Reference for Standard
Gly	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of GillulyiteHide

Lustre:

Adamantine

Transparency:

Translucent

Colour:

Deep red

Comment:

Tarnishes rapidly to a near-metallic luster.

Streak:

Brick red

Hardness:

2 - 2½ on Mohs scale

Cleavage:

Perfect
One perfect cleavage and possbly two poor cleavages (based on pitting during polishing).

Density:

4.02(2) g/cm³ (Measured) 4.14 g/cm³ (Calculated)

Comment:

Difference may be due to orpiment inclusions.

Optical Data of GillulyiteHide

Type:

Biaxial

Dispersion:

relatively strong

Reflectivity:

Wavelength	R₁ (%)	R₂ (%)	^imR₁ (%)	^imR₂ (%)
400nm	29.8%	32.0%	15.0%	18.6%
420nm	29.3%	31.8%	14.6%	18.1%
440nm	28.6%	31.55%	13.9%	17.7%
460nm	27.8%	31.0%	13.2%	17.05%
470nm	27.3%	30.6%	12.7%	16.65%
480nm	27.0%	30.4%	12.4%	16.25%
500nm	26.1%	29.6%	11.6%	15.5%
520nm	25.1%	28.9%	10.9%	14.8%
540nm	24.3%	28.2%	10.3%	14.1%
546nm	24.1%	28.0%	10.1%	13.9%
560nm	23.6%	27.5%	9.76%	13.5%
580nm	23.1%	26.9%	9.36%	12.9%
589nm	22.8%	26.6%	9.19%	12.6%
600nm	22.6%	26.25%	9.03%	12.4%
620nm	22.2%	25.8%	8.77%	12.0%
640nm	21.9%	25.4%	8.59%	11.8%
650nm	21.7%	25.3%	8.47%	11.7%
660nm	21.6%	25.2%	8.45%	11.6%
680nm	21.35%	24.9%	8.27%	11.4%
700nm	21.2%	24.8%	8.14%	11.2%

Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 32.0%.
R₁ shown in black, R₂ shown in red, ^imR₁ shown in green, ^imR₂ shown in blue

Comments:

Reflectivity from Wilson et al. (1993).

Chemistry of GillulyiteHide

Mindat Formula:

Tl₂As_7.5Sb_0.3S₁₃

Element Weights:

Element	% weight
S	57.265 %
As	24.016 %
Tl	18.719 %
Sb	0.000 %

Calculated from ideal end-member formula.

Elements listed:

As, S, Sb, Tl - search for minerals with similar chemistry

Crystallography of GillulyiteHide

Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Cell Parameters:

a = 9.58 Å, b = 5.67 Å, c = 21.5 Å
β = 100.07°

Ratio:

a:b:c = 1.69 : 1 : 3.792

Unit Cell V:

1,149.86 Å³ (Calculated from Unit Cell)

Morphology:

Simple monoclinic crystals exhibit forms {110}, {010}, and {01l}.

Twinning:

None observed

Comment:

Space group P2/n (Foit et al., 1995). Re-study revealed OD structure (Makovicky & Balić-Žunić, 1999).

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0001733	Gillulyite	Foit F F, Robinson P D, Wilson J R (1995) The crystal structure of gillulyite, Tl2(As,Sb)8S13, from the Mercur gold deposit, Tooele County, Utah, U.S.A American Mineralogist 80 394-399		1995		0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Gillulyite'
loop_
_publ_author_name
'Foit F F'
'Robinson P D'
'Wilson J R'
_journal_name_full 'American Mineralogist'
_journal_volume 80 
_journal_year 1995
_journal_page_first 394
_journal_page_last 399
_publ_section_title
;
 The crystal structure of gillulyite, Tl2(As,Sb)8S13, from the Mercur gold
 deposit, Tooele County, Utah, U.S.A
;
_database_code_amcsd 0001733
_chemical_formula_sum 'Tl As3.89 Sb.11 S6.5'
_cell_length_a 9.584
_cell_length_b 5.679
_cell_length_c 21.501
_cell_angle_alpha 90
_cell_angle_beta 100.07
_cell_angle_gamma 90
_cell_volume 1152.219
_exptl_crystal_density_diffrn      4.137
_symmetry_space_group_name_H-M 'P 1 2/n 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2-x,y,1/2-z'
  '1/2+x,-y,1/2+z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Tl1   0.81020   0.94830   0.14880   0.50000
Tl2   0.18950   0.88290   0.25890   0.50000
As1   0.47320   0.44720   0.08830   1.00000
As2   0.25870   0.90090   0.02050   1.00000
As3   0.09650   0.44760   0.08830   1.00000
As4   0.80770   0.21070   0.14460   0.43000
Sb1   0.80770   0.21070   0.14460   0.07000
As5   0.80870   0.66170   0.14680   0.46000
Sb2   0.80870   0.66170   0.14680   0.04000
S1   0.31050   0.38800   0.15430   1.00000
S2   0.64520   0.43700   0.18130   1.00000
S3   0.47080   0.85000   0.08760   1.00000
S4   0.24350   0.54300  -0.01910   1.00000
S5   0.09800   0.85200   0.08790   1.00000
S6   0.99800   0.43400   0.18110   1.00000
S7   0.84400   0.94100   0.22540   0.50000
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Tl1 0.03500 0.03500 0.06600 -0.00400 0.02400 -0.00800
Tl2 0.13000 0.05200 0.12500 -0.00900 -0.07700 -0.00400
As1 0.01000 0.01300 0.02100 0.00100 0.00230 0.00200
As2 0.01900 0.02500 0.02900 0.00300 0.00800 0.01400
As3 0.01100 0.01400 0.02300 0.00000 0.00690 0.00100
As4 0.01500 0.01600 0.01600 0.00100 0.00800 0.00200
Sb1 0.01500 0.01600 0.01600 0.00100 0.00800 0.00200
As5 0.01700 0.01400 0.01500 -0.00200 0.00600 0.00200
Sb2 0.01700 0.01400 0.01500 -0.00200 0.00600 0.00200
S1 0.00900 0.02500 0.03000 0.00200 0.00700 0.00900
S2 0.01500 0.02400 0.01800 0.00100 0.00900 -0.00200
S3 0.01900 0.01400 0.05100 -0.00400 0.00100 0.00000
S4 0.02300 0.05200 0.01800 0.00500 0.01000 -0.00400
S5 0.02800 0.02300 0.03100 0.00100 0.01300 -0.00200
S6 0.01200 0.02700 0.01800 -0.00400 0.00900 0.00000
S7 0.02800 0.01900 0.01300 0.00700 0.00500 0.00100

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
4.14 Å	(60)
3.87 Å	(60)
3.63 Å	(90)
3.077 Å	(100)
2.814 Å	(100)
2.718 Å	(60)
2.613 Å	(55)
2.502 Å	(70)
2.393 Å	(60)
1.766 Å	(70)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
High-? alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])
Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere	<0.6
53 : Other minerals with taphonomic origins	<0.4

Geological Setting:

In barite veins and in calcite veins.

Type Occurrence of GillulyiteHide

Type Locality:

ⓘ Lulu Cut, South Mercur Pit, Mercur Mining District, Tooele County, Utah, USA

General Appearance of Type Material:

Cleavable masses up to 2 cm in diameter and, rarely, as crystals to 1 mm in length.

Place of Conservation of Type Material:

Royal Ontario Museum, Toronto, Canada.
Harvard University, Cambridge, Massachusetts, USA, 130781.
National Museum of Natural History (Smithsonian), Washington, D.C., USA, 170773.

Geological Setting of Type Material:

A sediment-hosted, disseminated gold deposit.

Associated Minerals at Type Locality:

Baryte	Calcite	Lorándite	Orpiment	Pyrite
Raguinite	Realgar

Reference:

Synonyms of GillulyiteHide

IMA1989-029

Other Language Names for GillulyiteHide

Dutch:Gillulyiet

German:Gillulyit

Russian:Джиллюлиит

Simplified Chinese:辉砷锑铊矿

Spanish:Gillulyita

Common AssociatesHide

Associations Based on Photo Data:

9 photos of Gillulyite associated with Baryte	BaSO₄
6 photos of Gillulyite associated with Orpiment	As₂S₃
2 photos of Gillulyite associated with Realgar	As₄S₄
1 photo of Gillulyite associated with Picropharmacolite	Ca₄Mg(AsO₄)₂(HAsO₄)₂ · 11H₂O

Related Minerals - Strunz-mindat Grouping Hide

2.JC.05

Ellisite

Tl₃AsS₃

Trig. 3m : R3m

Other InformationHide

Special Storage/
Display Requirements:

Protect from light.

Health Risks:

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

Internet Links for GillulyiteHide

mindat.org URL:

https://www.mindat.org/min-1694.html
Please feel free to link to this page.

Search Engines:

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Look for Gillulyite in the Rock H. Currier Digital Library

External Links:

Look for Gillulyite on Webmineral

Look for Gillulyite on Wikipedia

Look for Gillulyite on Mineralien Atlas

Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

Mineral Dealers:

Buy from D. Joyce minerals

References for GillulyiteHide

Reference List:

Wilson, James R., Gupta, Pradip K. Sen, Robinson, Paul D., Criddle, Alan J. (1993) Fangite, Tl₃AsS₄ a new thallium arsenic sulfosalt from the Mercur Au deposit, Utah, and revised optical data for gillulyite. American Mineralogist, 78 (9-10) 1096-1103

Foit, Franklin F., Robinson, Paul D., Wilson, James R. (1995) The crystal structure of gillulyite, Tl₂(As,Sb)₈S₁₃, from the Mercur gold deposit, Tooele County, Utah, U.S.A. American Mineralogist, 80 (3) 394-399 doi:10.2138/am-1995-3-421

Makovicky, Emil, Balic-Zunic, Tonci (1999) Gillulyite Tl₂(As,Sb)₈S₁₃; reinterpretation of the crystal structure and order-disorder phenomena. American Mineralogist, 84 (3) 400-406 doi:10.2138/am-1999-0325

(2005) Gillulyite. Handbook of Mineralogy. Mineralogical Society of America

Tripathi, Ravi P. N.; Gao, Jie; Yang, Xiaodong (2021) Anisotropic optical responses of layered thallium arsenic sulfosalt gillulyite. Scientific Reports, 11 (1). 22002 doi:10.1038/s41598-021-01542-6

Localities for GillulyiteHide

Showing 2 localities.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the

symbol to view information about a locality. The

symbol next to localities in the list can be used to jump to that position on the map.

Hide all sections | Show all sections

Locality ListHide

- This locality has map coordinates listed.

- This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality.

- Good crystals or important locality for species.

- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). ~~Struck out~~ - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.


Russia
Sverdlovsk Oblast Serovsky District Turya river Tur'insk ⓘ Vorontsovskoe deposit (Vorontsovsk gold deposit; Vorontsovka deposit)	Plášil et al. (2018) +5 other references

USA (TL)
Utah Tooele County Mercur Mining District South Mercur Pit ⓘ Lulu Cut (TL)	Wilson et al. (1991)

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Gillulyite

About GillulyiteHide

Unique IdentifiersHide

Similar NamesHide

IMA Classification of GillulyiteHide

Classification of GillulyiteHide

Mineral SymbolsHide

Physical Properties of GillulyiteHide

Optical Data of GillulyiteHide

Chemistry of GillulyiteHide

Crystallography of GillulyiteHide

Crystal StructureHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of GillulyiteHide

Synonyms of GillulyiteHide

Other Language Names for GillulyiteHide

Common AssociatesHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for GillulyiteHide

References for GillulyiteHide

Localities for GillulyiteHide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide