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Pierrotite

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Jas Roux, Pelvoux Mt., Valgaudemar, Hautes-Alpes, Provence-Alpes-Côte d'Azur, France
© Van King

Show Pierrotite Photos (5)



Formula:
Tl
 
2
Sb
 
6
As
 
4
S
 
16
System:OrthorhombicColour:Grayish black
Hardness:3½
Name:For French mineralogist, Roland Pierrot (b.1930).
Dimorph of:Parapierrotite
This page provides mineralogical data about Pierrotite.

Classification of Pierrotite

IMA status:Approved 1969
Strunz 8th edition ID:2/E.14-30
Nickel-Strunz 10th (pending) edition ID:2.HC.05f

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
C : With only Pb
Dana 8th edition ID:3.8.7.1

3 : SULFOSALTS
8 : 1 < ø < 2
Hey's CIM Ref.:5.5.17

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 Pierrotite

Type Locality:Jas Roux, Pelvoux Mt., Valgaudemar, Hautes-Alpes, Provence-Alpes-Côte d'Azur, France
General Appearance of Type Material:Gray black laths and polycrystalline aggregates
Year of Discovery:1970
Geological Setting of type material:Hydrothermal deposit in limestone
Associated Minerals at type locality:
Realgar

Physical Properties of Pierrotite

Lustre:Metallic, Sub-Metallic
Diaphaneity (Transparency):Opaque
Colour:Grayish black
Streak:Red-brown
Hardness (Mohs):3½
Tenacity:Brittle
Cleavage:None Observed
Fracture:Irregular/Uneven, Sub-Conchoidal
Density (measured):4.97 g/cm3
Density (calculated):4.75 g/cm3

Crystallography of Pierrotite

Crystal System:Orthorhombic
Class (H-M):mm2 - Pyramidal
Space Group:Pna21
Space Group Setting:Pna21
Cell Parameters:a = 8.77Å, b = 38.8Å, c = 8.03Å
Ratio:a:b:c = 0.226 : 1 : 0.207
Unit Cell Volume:V 2,732.42 ų (Calculated from Unit Cell)
Z:4
Comment:Axes are in a new setting; old transformation abc -> bac
X-Ray Powder Diffraction:
d-spacingIntensity
3.63 (80)
3.59 (100)
3.49 (90)
2.84 (80)
2.70 (90)
2.52 (60)
2.47 (60)
2.35 (80)
Comments:ICDD 25-938

Optical Data of Pierrotite

Type:Anisotropic
Reflectivity:
nmR= = 31.3 - 35.0 (540 nm%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 0%.

Chemical Properties of Pierrotite

Formula:
Tl
 
2
Sb
 
6
As
 
4
S
 
16
Essential elements:As, S, Sb, Tl
All elements listed in formula:As, S, Sb, Tl

Relationship of Pierrotite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.HC.05bBaumhauerite-2a
Pb
 
11
Ag(As,Sb)
 
18
S
 
36
2.HC.05bBaumhauerite
Pb
 
3
As
 
4
S
 
9
2.HC.05eChabournéite
Tl
 
21-x
Pb
 
2x
(Sb,As)
 
91-x
S
 
147
 (x = 0-17.5)
2.HC.05dDufrénoysite
Pb
 
2
As
 
2
S
 
5
2.HC.05aGuettardite
Pb(Sb,As)
 
2
S
 
4
2.HC.05cLiveingite
Pb
 
9
As
 
13
S
 
28
2.HC.05fParapierrotite
Tl(Sb,As)
 
5
S
 
8
2.HC.05dRathite
Pb
 
8
Pb
 
4-x
(Tl
 
2
As
 
2
)
 
x
(Ag
 
2
As
 
2
)As
 
16
S
 
40
2.HC.05aSartorite
PbAs
 
2
S
 
4
2.HC.05aTwinnite
Pb(Sb,As)
 
2
S
 
4
2.HC.05dVeenite
Pb
 
2
(Sb,As)
 
2
S
 
5
2.HC.05gMarumoite
Pb
 
32
As
 
40
S
 
92
2.HC.05eDalnegroite
(Tl
 
4
Pb
 
2
)(As
 
12
Sb
 
8
)S
 
34
2.HC.10aFülöppite
Pb
 
3
Sb
 
8
S
 
15
2.HC.10cHeteromorphite
Pb
 
7
Sb
 
8
S
 
19
2.HC.10bPlagionite
Pb
 
5
Sb
 
8
S
 
17
2.HC.10dRayite
Pb
 
8
(Ag,Tl)
 
2
Sb
 
8
S
 
21
2.HC.10dSemseyite
Pb
 
9
Sb
 
8
S
 
21
2.HC.15Boulangerite
Pb
 
5
Sb
 
4
S
 
11
2.HC.15Falkmanite
Pb
 
5.4
Sb
 
3.6
S
 
11
2.HC.15Plumosite
2.HC.20Robinsonite
Pb
 
4
Sb
 
6
S
 
13
2.HC.25Moëloite
Pb
 
6
Sb
 
6
S
 
14
(S
 
3
)
2.HC.30Dadsonite
Pb
 
23
Sb
 
25
S
 
60
Cl
2.HC.35Owyheeite
Ag
 
3+x
Pb
 
10-2x
Sb
 
11+x
S
 
28
, -0.13 < x > +0.20
2.HC.35Zoubekite
AgPb
 
4
Sb
 
4
S
 
10
2.HC.40Parasterryite
Ag
 
4
Pb
 
20
Sb
 
14
As
 
10
S
 
58
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
5.5.12Gillulyite
Tl
 
2
(As,Sb)
 
8
S
 
13
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
5.5.18Parapierrotite
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 Pierrotite

Synonyms:
IMA1969-036
Other Languages:
German:Pierrotit
Russian:Пьерротит
Simplified Chinese:硫锑铊矿
Spanish:Pierrotita

Other Information

Fluorescence in UV light:Not fluorescent
Health Warning:Contains thallium - always wash hands after handling. Avoid inhaling dust when handling or breaking. Never lick or ingest.

References for Pierrotite

Reference List:

- +
Bulletin Mineralogie (1970) 93:66.

American Mineralogist (1972): 57: 1909-1910.

American Mineralogist (1985): 70: 220.

Zeitschrift für Kristallographie: 165: 209-215.

Internet Links for Pierrotite

Search Engines:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Pierrotite details from Handbook of Mineralogy (PDF)
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    • Localities for Pierrotite

    The 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 Locality List
    (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.
    France
     
    • Provence-Alpes-Côte d'Azur
      • Hautes-Alpes
        • Valgaudemar
          • Pelvoux Mt.
    		Bull.Soc.fr.Min.Crist.(1970) 93, 66-71; American Mineralogist, Volume 68, pages 235-244, 1983
    Italy
     
    • Trentino-Alto Adige
      • Bolzano Province (South Tyrol)
        • Passiria Valley (Passeier Valley)
    		Exel, R. (1987): Guida mineralogica del Trentino e del Sudtirolo. Athesia, Bolzano, 204 pp.
    Exel, R. (1987): Guida mineralogica del Trentino e del Sudtirolo. Athesia, Bolzano, 204 pp.
    Exel, R. (1987): Guida mineralogica del Trentino e del Sudtirolo. Athesia, Bolzano, 204 pp.
        • Venosta Valley
          • Senales Valley (Schnals Valley)
    		Exel, R. (1987): Guida mineralogica del Trentino e del Sudtirolo. Athesia, Bolzano, 204 pp.
    USA
     
    • Utah
      • Tooele Co.
        • Little Valley
    		Handbook of Mineralogy
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