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Roland Pierrot (1930-1998)
Some Sb may be replaced by As (note that pierrotite has a much higher As content).
2½ - 3
Specific Gravity:
Crystal System:
Member of:
Named for close relation to pierrotite, which was named after Roland Pierrot (1930-1998).
Dimorph of:
Prismatic crystals, also laths and grains.

Hide all sections | Show all sections

Classification of ParapierrotiteHide


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

8 : 1 < ø < 2

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

Physical Properties of ParapierrotiteHide

2½ - 3 on Mohs scale
VHN100=76 - Vickers
Good basal cleavage (or parting?), and possible poorer cleavage in other directions (see: and other photos). The original description incorrectly says that no cleavage was observed.
5.07 g/cm3 (Measured)    5.04 g/cm3 (Calculated)

Optical Data of ParapierrotiteHide

nmR= = 29.1 - 39.7 (540 nm%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 0%.

Chemical Properties of ParapierrotiteHide


Some Sb may be replaced by As (note that pierrotite has a much higher As content).

Crystallography of ParapierrotiteHide

Crystal System:
Class (H-M):
m - Domatic
Cell Parameters:
a = 8.098(5) Å, b = 19.415(12) Å, c = 9.059(6) Å
β = 91.96(8)°
a:b:c = 0.417 : 1 : 0.467
Unit Cell V:
1,423.45 ų (Calculated from Unit Cell)
Prismatic crystals to 3 mm
None observed.
Space group Pn. (Originally assumed to have P21/n.)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
4.15 (90)
3.93 (60)
3.70 (90)
3.60 (70)
3.49 (100)
2.91 (90)
2.83 (100)
2.36 (90)
ICDD 29-1330

Type Occurrence of ParapierrotiteHide

Synonyms of ParapierrotiteHide

Other Language Names for ParapierrotiteHide

Relationship of Parapierrotite to other SpeciesHide

Member of:
Other Members of this group:
ArgentobaumhaueriteAg1.5Pb22As33.5S72Tric. 1 : P1
ArgentodufrénoysiteAg3Pb26As35S80Tric. 1 : P1
ArgentoliveingiteAgxPb40-2xAs48+xS112Tric. 1 : P1
BarikaiteAg3Pb10(Sb8As11)S40Mon. 2/m : P21/b
BaumhaueritePb12As16S36Tric. 1 : P1
BernarlottiitePb6(As5Sb3)S18Tric. 1 : P1
BoscardiniteTlPb4(Sb7As2)S18Tric. 1 : P1
Carducciite(Ag2Sb2)Pb12(As,Sb)16S40Mon. 2/m : P21/b
DufrénoysitePb2As2S5Mon. 2 : P21
ÉcrinsiteAgTl3Pb4As11Sb9S36Tric. 1 : P1
EnneasartoriteTl6Pb32As70S140Mon. 2/m : P21/b
GuettarditePbAsSbS4Mon. 2/m : P21/b
HendekasartoriteTl2Pb48As82S172Mon. 2/m : P21/b
HeptasartoriteTl7Pb22As55S108Mon. 2/m : P21/b
HyršlitePb8As10Sb6S32Mon. 2 : P21
IncomsartoriteTl6Pb144As246S516Mon. 2/m
PhilrothiteTlAs3S5Mon. 2/m : P21/b
PierrotiteTl2(Sb,As)10S16Orth. mm2 : Pna21
PolloneiteAgPb46As26Sb23S120Mon. 2 : P21
RathiteAg2Pb12-xTlx/2As18+x/2S40Mon. 2/m : P21/b
SartoritePbAs2S4Mon. 2/m : P21/m
Twinnite Pb0.8Tl0.1Sb1.3As0.8S4Mon. 2/m
VeenitePb2(Sb,As)2S5Mon. 2 : P21

Common AssociatesHide

Associated Minerals Based on Photo Data:
Chert23 photos of Parapierrotite associated with Chert on
Arseniosiderite7 photos of Parapierrotite associated with Arseniosiderite on
Tripuhyite7 photos of Parapierrotite associated with Tripuhyite on
Weissbergite6 photos of Parapierrotite associated with Weissbergite on
Quartz5 photos of Parapierrotite associated with Quartz on
Kermesite5 photos of Parapierrotite associated with Kermesite on
Hematite5 photos of Parapierrotite associated with Hematite on
Marcasite5 photos of Parapierrotite associated with Marcasite on
Chalcedony4 photos of Parapierrotite associated with Chalcedony on
Realgar3 photos of Parapierrotite associated with Realgar on

Related Minerals - Nickel-Strunz GroupingHide

2.HC.05bArgentobaumhaueriteAg1.5Pb22As33.5S72Tric. 1 : P1
2.HC.05bBaumhaueritePb12As16S36Tric. 1 : P1
2.HC.05eChabournéiteTl4Pb2(Sb,As)20S34Tric. 1 : P1
2.HC.05dDufrénoysitePb2As2S5Mon. 2 : P21
2.HC.05aGuettarditePbAsSbS4Mon. 2/m : P21/b
2.HC.05fPierrotiteTl2(Sb,As)10S16Orth. mm2 : Pna21
2.HC.05dRathiteAg2Pb12-xTlx/2As18+x/2S40Mon. 2/m : P21/b
2.HC.05aSartoritePbAs2S4Mon. 2/m : P21/m
2.HC.05aTwinnite Pb0.8Tl0.1Sb1.3As0.8S4Mon. 2/m
2.HC.05dVeenitePb2(Sb,As)2S5Mon. 2 : P21
2.HC.05gMarumoitePb32As40S92Mon. 2 : P21
2.HC.05eDalnegroite(Tl4Pb2)(As12Sb8)S34Tric. 1 : P1
2.HC.10aFülöppitePb3Sb8S15Mon. 2/m : B2/b
2.HC.10cHeteromorphitePb7Sb8S19Mon. 2/m : B2/b
2.HC.10bPlagionitePb5Sb8S17Mon. 2/m
2.HC.10dSemseyitePb9Sb8S21Mon. 2/m : B2/b
2.HC.15BoulangeritePb5Sb4S11Mon. 2/m : P21/b
2.HC.20RobinsonitePb4Sb6S13Mon. 2/m : P21/m
2.HC.25MoëloitePb6Sb6S14(S3)Orth. 2 2 2 : P21 21 2
2.HC.30DadsonitePb23Sb25S60ClTric. 1 : P1
2.HC.35OwyheeiteAg3+xPb10-2xSb11+xS28, -0.13 < x > +0.20Mon. 2/m : P21/b
2.HC.40ParasterryiteAg4Pb20Sb14As10S58Mon. 2/m : P21/b

Related Minerals - Dana Grouping (8th Ed.)Hide 2/m : P21/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

5.5.1LoránditeTlAsS2Mon. 2/m : P21/b
5.5.2EllisiteTl3AsS3Trig. 3m : R3m
5.5.3ImhofiteTl5.8As15.4S26Mon. 2/m
5.5.4SimoniteTlHgAs3S6Mon. 2/m
5.5.6ChristiteTlHgAsS3Mon. 2/m
5.5.6RouthieriteTl(Cu,Ag)(Hg,Zn)2(As,Sb)2S6Tet. 4 2m : I4 2m
5.5.9BernarditeTlAs5S8Mon. 2/m : P21/b
5.5.10VrbaiteHg3Tl4As8Sb2S20Orth. mmm (2/m 2/m 2/m) : Cmca
5.5.11RebuliteTl5Sb5As8S22Mon. 2/m : P21/b
5.5.13WeissbergiteTlSbS2Tric. 1 : P1
5.5.16ChalcothalliteTl2(Cu,Fe)6SbS4Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
5.5.17PierrotiteTl2(Sb,As)10S16Orth. mm2 : Pna21
5.5.20ChabournéiteTl4Pb2(Sb,As)20S34Tric. 1 : P1

Fluorescence of ParapierrotiteHide

Not fluorescent

Other InformationHide

Health Risks:
Contains thallium - always wash hands after handling. Avoid inhaling dust when handling or breaking. Never lick or ingest.

References for ParapierrotiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mantienne, J. (1974): La minéralisation thallifère de Jas Roux. PhD thesis, Université de Paris, 203 p. [as "clinopierrotite"]
John, Z., Picot, P., Hak, J., Kvaček, M. (1975): La parapierrotite, un nouveau minéral thallifère d'Allchar (Yougoslavie). Tschermaks Mineralogische und Petrographische Mitteilungen 22, 200-210.
American Mineralogist (1976): 61: 504 (abs.)
P&J 287
Engel, P. (1980): Die Kristallstruktur von synthetischem Parapierrotit, TlSb5S8. Zeitschrift für Kristallographie 151, 203-216.

Internet Links for ParapierrotiteHide

Localities for ParapierrotiteHide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Ontario
    • Thunder Bay District
      • Bomby Township
Mineralogical Magazine 1988 52 : 691-697
Ann P.Sabina (1991), Rocks and Minerals for the Collector, Sudbury to Winnipeg. GSC Misc. Report 49. p.86
Mineralogical Magazine 1988 52 : 691-697
M. Bonnemaison, J. Delair, F. Tollon, Chron. Rech. Min., N° 486, 1987, pp 81-84.
  • Provence-Alpes-Côte d'Azur
    • Hautes-Alpes
      • La Chapelle-en-Valgaudemar (La Chapelle-en-Valgaudémar)
Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990; Johan, Z. & Mantienne, J. (2000): Thallium-rich mineralization at Jas Roux, Hautes-Alpes, France: a complex epithermal, sediment-hosted, ore-forming system. J. Czech Geol. Soc. 45, 63-77.
  • Tuscany
    • Lucca Province
      • Apuan Alps
        • Stazzema
          • Sant'Anna di Stazzema
Biagioni, C., Moëlo, Y., and Zaccarini, F. (2017) Ferdowsiite from the Monte Arsiccio mine, Apuan Alps, Tuscany (Italy): occurrence and crystal structure. Atti della Società Toscana di Scienze Naturali, Memorie, 124, 5-11.
Republic of Macedonia (TL)
  • Kavadarci
    • Rožden (Rozhden; Roszdan)
Tschermaks Min. Petr. (1975) 22, 200-210; Rieck, B. (1993) - Famous mineral localities: Allchar, Macedonia, Mineralogical Record, 24 (6), 437-449; Percival, T.J. & Radtke, A.S. (1994): Sedimentary-rock-hosted disseminated gold mineralization in the Alšar district, Macedonia. Canadian Mineralogist, 32, 649-655.; Boevl, B., Bermanec, V., Serafimovski, T., Lepitkoval, S., & Mikulcic, S. (2001). Allchar Mineral Assemblage. Geologica Macedonica, Vol. 15-16, p. 1-23 (2001-2002) Suppl
Gunnar Färber specimens
  • Wallis (Valais)
    • Binn Valley
      • Fäld (Imfeld; Im Feld; Feld); Raber, T. (2016): Parapierrotit. Schweizer Strahler 50 (1), 24-25.
  • Utah
    • Tooele Co.
      • Sheeprock Mts
        • Blue Bell District
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
        • Little Valley
King, N. R. (2014, October). THE MINERAL ASSEMBLAGE FROM LOOKOUT PASS AREA, SHEEPROCK MOUNTAINS, TOOELE CO., UTAH. In 2014 GSA Annual Meeting in Vancouver, British Columbia.
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