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Guettardite

A valid IMA mineral species
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About GuettarditeHide

02028330017271923686932.jpg
Jean-Étienne Guettard
Formula:
Pb8(Sb0.56As0.44)16S32
Ordered arrangement of As and Sb atoms. Also written as PbAsSbS4.
Colour:
Greyish black
Lustre:
Metallic
Hardness:
4
Specific Gravity:
5.29 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
Named in honor of Jean-Étienne Guettard (22 September 1715, Étampes, Essonne, France – 7 January 1786, Paris, France), French geologist, botanist and natural historian. He is credited with the creation of the first mineralogical-geological map known (western Europe) in 1746, Carte minéralogique du Canada et de la Louisiane (Eastern Canada and USA) in 1752, followed by the Atlas minéralogique de la France (with Lavoisier) in 1767, and the Carte minéralogique de la France in 1784. Guettard was a member of the Académie des Sciences from 1743 and is the author of La minéralogie du Dauphiné (1782).
Related to twinnite (Sb:As ~ 13:8, bit variable) and hyršlite (Sb:As = 6:10).


Unique IdentifiersHide

Mindat ID:
1768
Long-form identifier:
mindat:1:1:1768:4

Similar NamesHide

GottardiiteA valid IMA mineral speciesNa3Mg3Ca5Al19Si117O272 · 93H2O
GottharditeA synonym of Dufrénoysite

IMA Classification of GuettarditeHide

Approved
IMA Formula:
Pb2+Sb3+As3+S2-4
Approval year:
1966
First published:
1967

Classification of GuettarditeHide

2.HC.05a

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
C : With only Pb
3.7.8.2

3 : SULFOSALTS
7 : ø = 2
5.6.18

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

Mineral SymbolsHide

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

SymbolSourceReference for Standard
GueIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of GuettarditeHide

Metallic
Transparency:
Opaque
Colour:
Greyish black
Streak:
Black to brown
Hardness:
Hardness:
VHN50=180 - 197 kg/mm2 - Vickers
Tenacity:
Very brittle
Cleavage:
Perfect
Cleavage given as perfect on {001} type material, but no cleavage is given for 2nd reported occurrence.
Fracture:
Conchoidal
Density:
5.29 g/cm3 (Calculated)

Optical Data of GuettarditeHide

Reflectivity:
WavelengthR1 (%)R2 (%)imR1 (%)imR2 (%)
470nm37.6%42.6%22.3%26.1%
546nm36.1%41.2%20.4%23.6%
589nm34.8%39.3%19.5%22.9%
650nm32.8%36.7%17.9%21.2%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 42.6%.
R1 shown in black, R2 shown in red, imR1 shown in green, imR2 shown in blue
Colour in reflected light:
White
Internal Reflections:
Internal reflections red in type material, none in some other material
Pleochroism:
Strong
Comments:
Nearly opaque, but a slight reddish internal reflection is observable in minute fragments under a very strong light.

Chemistry of GuettarditeHide

Mindat Formula:
Pb8(Sb0.56As0.44)16S32

Ordered arrangement of As and Sb atoms. Also written as PbAsSbS4.
Element Weights:
Element% weight
S90.829 %
Pb9.171 %
As0.000 %
Sb0.000 %

Calculated from ideal end-member formula.
Common Impurities:
Cu

Crystallography of GuettarditeHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 8.527(4) Å, b = 7.971(4) Å, c = 20.102(10) Å
β = 101.814(7)°
Ratio:
a:b:c = 1.07 : 1 : 2.522
Unit Cell V:
1,337.37 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Acicular crystals, anhedral grains.
Twinning:
polysynthetic on {100}

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0019213GuettarditeMakovicky E, Topa D, Tajjedin H, Rastad E, Yaghubpur A (2012) The crystal structure of guettardite, PbAsSbS4, and the twinnite-guettardite problem The Canadian Mineralogist 50 253-2652012Barika Au-Ag deposit in the Azarbaijan Province, western Iran0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.52 Å(100)
2.795 Å(90)
4.19 Å(50)
3.90 Å(50)
2.670 Å(50)
2.653 Å(50)
2.335 Å(40)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
High-? alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])

Type Occurrence of GuettarditeHide

General Appearance of Type Material:
Isolated anhedral grains.
Place of Conservation of Type Material:
Canadian Geological Survey, Ottawa, Canada, 12167.
Royal Ontario Museum, Toronto, Canada.
Geological Setting of Type Material:
Low temperature hydrothermal vein.
Associated Minerals at Type Locality:

Synonyms of GuettarditeHide

Other Language Names for GuettarditeHide

Relationship of Guettardite to other SpeciesHide

Member of:
Other Members of Sartorite Group:
ArgentobaumhaueriteAg1.5Pb22As33.5S72Tric. 1 : P1
ArgentodufrénoysiteAg3Pb26As35S80Tric. 1 : P1
ArgentoliveingiteAg3+xPb36-2xAs51+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
DekatriasartoriteTlPb58As97S204Mon. 2/m : P21/b
DufrénoysitePb2As2S5Mon. 2 : P21
ÉcrinsiteAgTl3Pb4As11Sb9S36Tric. 1 : P1
EnneasartoriteTl6Pb32As70S140Mon. 2/m : P21/b
GeueriteAg2Tl4Pb4As22S40Mon. 2/m : P21/b
GiuşcăiteAg2Tl4Pb4As20Sb2S40Mon. m
HendekasartoriteTl2Pb48As82S172Mon. 2/m : P21/b
HeptasartoriteTl7Pb22As55S108Mon. 2/m : P21/b
HyršlitePb8As10Sb6S32Mon. 2 : P21
IncomsartoriteTl6Pb144As246S516Mon. 2/m
InterliveingiteAgPb18As25S56Mon. 2 : P21
LiveingitePb20As24S56Mon. 2 : P21
ParapierrotiteTlSb5S8Mon. 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
VeenitePb16Sb9-xAs7+xS40, x ~ 0-0.5Mon. 2 : P21

Common AssociatesHide

Associations Based on Photo Data:
3 photos of Guettardite associated with OrpimentAs2S3
3 photos of Guettardite associated with ZinkenitePb9Sb22S42
1 photo of Guettardite associated with EnargiteCu3AsS4

Related Minerals - Strunz-mindat GroupingHide

2.HC.BernarlottiitePb6(As5Sb3)S18Tric. 1 : P1
2.HC.HuntingdonitePb19Sb16As6S51Cl2Tric. 1 : P1
2.HC.MoiraitePb12Sb8As8S36Tric. 1 : P1
2.HC.05fParapierrotiteTlSb5S8Mon. m
2.HC.05gMarumoitePb32As40S92Mon. 2 : P21
2.HC.05bBaumhauerite II
2.HC.05dRathiteAg2Pb12-xTlx/2As18+x/2S40Mon. 2/m : P21/b
2.HC.05eHeptasartoriteTl7Pb22As55S108Mon. 2/m : P21/b
2.HC.05dDufrénoysitePb2As2S5Mon. 2 : P21
2.HC.05eHendekasartoriteTl2Pb48As82S172Mon. 2/m : P21/b
2.HC.05bArgentobaumhaueriteAg1.5Pb22As33.5S72Tric. 1 : P1
2.HC.05cArgentoliveingiteAg3+xPb36-2xAs51+xS112Tric. 1 : P1
2.HC.05bBaumhaueritePb12As16S36Tric. 1 : P1
2.HC.05dVeenitePb16Sb9-xAs7+xS40, x ~ 0-0.5Mon. 2 : P21
2.HC.05eDekatriasartoriteTlPb58As97S204Mon. 2/m : P21/b
2.HC.05aHyršlitePb8As10Sb6S32Mon. 2 : P21
2.HC.05eIncomsartoriteTl6Pb144As246S516Mon. 2/m
2.HC.05cLiveingitePb20As24S56Mon. 2 : P21
2.HC.05cJohnjamboritePb14Sb8.5As7.5S38Tric. 1 : P1
2.HC.05fPierrotiteTl2(Sb,As)10S16Orth. mm2 : Pna21
2.HC.05dRathite-IVPbAs2S4
2.HC.05dArgentodufrénoysiteAg3Pb26As35S80Tric. 1 : P1
2.HC.05eÉcrinsiteAgTl3Pb4As11Sb9S36Tric. 1 : P1
2.HC.05aSartoritePbAs2S4Mon. 2/m : P21/m
2.HC.05aTwinnite Pb0.8Tl0.1Sb1.3As0.8S4Mon. 2/m
2.HC.05fPhilrothiteTlAs3S5Mon. 2/m : P21/b
2.HC.05hPolloneiteAgPb46As26Sb23S120Mon. 2 : P21
2.HC.10aFülöppitePb3Sb8S15Mon. 2/m : B2/b
2.HC.10dSemseyitePb9Sb8S21Mon. 2/m : B2/b
2.HC.10dRayitePb8(Ag,Tl)2Sb8S21Mon.
2.HC.10cHeteromorphitePb7Sb8S19Mon. 2/m : B2/b
2.HC.10bPlagionitePb5Sb8S17Mon. 2/m : B2/b
2.HC.15FalkmanitePb3Sb2S6Mon.
2.HC.15BoulangeritePb5Sb4S11Mon. 2/m : P21/b
2.HC.20RobinsonitePb4Sb6S13Mon. 2/m : P21/m
2.HC.25MoëloitePb6Sb6S14(S3)Orth. 222 : P21212
2.HC.30DadsonitePb23Sb25S60ClTric. 1 : P1
2.HC.35ZoubekiteAgPb4Sb4S10Orth.
2.HC.35Proto-owyheeiteAg9Pb40Sb45S112Mon. 2/m : P21/b
2.HC.35OwyheeiteAg3Pb10Sb11S28Mon. 2/m
2.HC.40ParasterryiteAg4Pb20Sb14As10S58Mon. 2/m : P21/b
2.HC.50LopatkaitePb5Sb3AsS11Mon. 2/m : P21/b

Other InformationHide

Notes:
HNO3 tarnishes guettardite black. KOH tarnishes it iridescent, leaving a flat brownish grey colour (as with twinnite). Reactions with other standard reagents are negative.
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 GuettarditeHide

References for GuettarditeHide

Localities for GuettarditeHide

Showing 18 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.
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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.
Canada
 
  • British Columbia
    • Omineca Mining Division
      • Owen Lake
Hood et al. (1991)
  • Ontario
    • Hastings County
      • Centre Hastings Municipality
        • Madoc
Jambor (1967) +2 other references
Chile
 
  • Atacama
    • Chañaral Province
      • Potrerillos
Thompson et al. (2004)
France
 
  • Provence-Alpes-Côte d'Azur
    • Hautes-Alpes
      • Gap
        • La Chapelle-en-Valgaudemar
Canadian Mineralogist 18:13 +2 other references
Iran
 
  • West Azerbaijan Province
    • Sardasht County
      • Sardasht
Topa et al. (2013)
Italy
 
  • Piedmont
    • Cuneo Province
      • Ormea
Orlandi P. (2005) +1 other reference
    • Metropolitan City of Turin
      • Oulx
        • Signols
- (n.d.) +2 other references
  • Tuscany
    • Lucca Province
      • Seravezza
Bracci et al. (1980) +3 other references
Biagioni C. et al. (2019)
Orlandi et al. (2009)
Kyrgyzstan
 
  • Batken Region
    • Kadamjay District
      • Aydarken
Kolesar et al. (1993)
Kolesar et al. (1993)
Romania
 
  • Hunedoara County
    • Certeju de Sus
Ciobanu et al. (2004)
Russia
 
  • Sverdlovsk Oblast
    • Serovsky District
      • Turya river
        • Tur'insk
Kasatkin et al. (2018) +2 other references
  • Zabaykalsky Krai
Eremin et al. (2023)
Switzerland
 
  • Valais
    • Sierre
      • Lens
Ansermet et al. (2011)
USA
 
  • Colorado
    • San Juan County
      • Anvil Mountain
Eckel et al. (1997)
  • Nevada
    • Eureka County
      • Carlin Trend
        • Maggie Creek Mining Subdistrict
Newmont Mining Corporation
 
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