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Bernarlottiite

A valid IMA mineral species
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01295740017272472467951.jpg
Bernarlottiite

Ceragiola quarries, Seravezza quarrying basin, Seravezza, Lucca Province, Tuscany, Italy
07563720017545963373882.jpg
Bernarlottiite

Ceragiola quarries, Seravezza quarrying basin, Seravezza, Lucca Province, Tuscany, Italy
01295740017272472467951.jpg
Bernarlottiite

Ceragiola quarries, Seravezza quarrying basin, Seravezza, Lucca Province, Tuscany, Italy
07563720017545963373882.jpg
Bernarlottiite

Ceragiola quarries, Seravezza quarrying basin, Seravezza, Lucca Province, Tuscany, Italy
01295740017272472467951.jpg
Bernarlottiite

Ceragiola quarries, Seravezza quarrying basin, Seravezza, Lucca Province, Tuscany, Italy
07563720017545963373882.jpg
Bernarlottiite

Ceragiola quarries, Seravezza quarrying basin, Seravezza, Lucca Province, Tuscany, Italy
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About BernarlottiiteHide

09405540017272472463594.jpg
Bernardino Lotti
Formula:
Pb6(As5Sb3)S18
Colour:
Lead-gray
Lustre:
Metallic
Specific Gravity:
5.601 (Calculated)
Crystal System:
Triclinic
Member of:
Sartorite Group
Name:
Named in honor of Bernardino Lotti (4 May 1847, Massa Marittima, Tuscany, Italy - 11 January 1933, Rome, Italy), geologist, for his significant contribution to the knowledge of the geology of Tuscany and to the development of the Tuscan mining industry. He also served as president of the Italian Geological Society.
Sb-rich homeotype of baumhauerite.
Closely related to écrinsite.


Unique IdentifiersHide

Mindat ID:
46083
Long-form identifier:
mindat:1:1:46083:7

IMA Classification of BernarlottiiteHide

Classification of BernarlottiiteHide

Strunz-mindat (2026):
2.HC.

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

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

Physical Properties of BernarlottiiteHide

Lustre:
Metallic
Transparency:
Opaque
Colour:
Lead-gray
Tenacity:
Brittle
Cleavage:
None Observed
Density:
5.601 g/cm3 (Calculated)
Comment:
Calculated for ideal formula

Optical Data of BernarlottiiteHide

Anisotropism:
Distinctly (air) to strongly (oil) anisotropic, grayish to bluish rotation tints
Bireflectance:
Distinct
Reflectivity:
WavelengthR1 (%)R2 (%)
470nm30.0%37.5%
546nm30.3%37.3%
589nm29.7%36.8%
650nm29.3%36.2%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 37.5%.
R1 shown in black, R2 shown in red
Colour in reflected light:
White
Internal Reflections:
Abundant, red
Pleochroism:
Weak
Comments:
Shades of gray-blue. Weak in air, distinct in oil.

Chemistry of BernarlottiiteHide

Mindat Formula:
Pb6(As5Sb3)S18
Element Weights:
Element% weight
Pb48.558 %
S22.543 %
As14.632 %
Sb14.267 %

Calculated from ideal end-member formula.
Elements listed:
As, Pb, S, Sb - search for minerals with similar chemistry

Crystallography of BernarlottiiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 23.501(8) Å, b = 8.386(2) Å, c = 23.704(8) Å
α = 89.88(1)°, β = 102.93(1)°, γ = 89.91(1)°
Ratio:
a:b:c = 2.802 : 1 : 2.827
Unit Cell V:
4553 ų
Z:
3
Morphology:
Acicular on [010]

X-Ray Powder DiffractionHide

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 BernarlottiiteHide

Type Locality:
ⓘ Ceragiola quarries, Seravezza quarrying basin, Seravezza, Lucca Province, Tuscany, Italy
General Appearance of Type Material:
Lead-gray acicular crystals up to 1 mm in length and few micrometers in width
Place of Conservation of Type Material:
Type material is deposited in the collections of the Museo di Storia Naturale, Universittà di Pisa, Via Roma 79, Calci (Pisa), Italy, catalogue number 19687.
Geological Setting of Type Material:
Cavities in Early Jurassic marbles that experienced an Alpine tectonometamorphic event
Associated Minerals at Type Locality:
GuettarditeRobinsoniteIzoklakeiteZinkeniteBoulangerite
SartoriteSemseyiteJordanite
Reference:
Orlandi, Paolo, Biagioni, Cristian, Bonaccorsi, Elena, Moëlo, Yves, Paar, Werner H. (2017) Lead-antimony sulfosalts from Tuscany (Italy) XXI. Bernarlottiite, Pb12(As10Sb6)Σ16S36, a new N = 3.5 member of the sartorite homologous series from the Ceragiola marble quarry: occurrence and crystal structure. European Journal of Mineralogy, 29 (4) 713-726 doi:10.1127/ejm/2017/0029-2625

Synonyms of BernarlottiiteHide

Other Language Names for BernarlottiiteHide

Relationship of Bernarlottiite to other SpeciesHide

Member of:
Sartorite Group
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
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
GuettarditePb8(Sb0.56As0.44)16S32Mon. 2/m : P21/b
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

Related Minerals - Strunz-mindat GroupingHide

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.05aGuettarditePb8(Sb0.56As0.44)16S32Mon. 2/m : P21/b
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

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 BernarlottiiteHide

References for BernarlottiiteHide

Localities for BernarlottiiteHide

Showing 3 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.
Italy (TL)
 
  • Tuscany
    • Lucca Province
      • Seravezza
        • Seravezza quarrying basin
Williams et al. (2014) +2 other references
Romania
 
  • Hunedoara County
    • Certeju de Sus
Dincă et al. (2025)
Russia
 
  • Sverdlovsk Oblast
    • Serovsky District
      • Turya river
        • Tur'insk
Kasatkin et al. (2021)
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