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Boscardinite

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About BoscardiniteHide

Matteo Boscardin
Formula:
TlPb4(Sb7As2)S18
It is possible that the formula extends to AgTl2Pb6(Sb15As4)Σ19S36.
Colour:
lead-grey
Lustre:
Metallic
Specific Gravity:
5.355 g/cm3 (Calculated)
Crystal System:
Triclinic
Member of:
Name:
After Matteo Boscardin (b. 1939), a mineral collector, for his contribution to the knowledge of regional mineralogy in Italy through the publication of over 100 papers.
Chemically related to chabournéite, jentschite, and protochabournéite.


Classification of BoscardiniteHide

Approved
Approval Year:
2011

Physical Properties of BoscardiniteHide

Metallic
Transparency:
Opaque
Colour:
lead-grey
Streak:
black
Hardness Data:
Could not be measured
Fracture:
Conchoidal
Density:
5.355 g/cm3 g/cm3 (Calculated)

Chemical Properties of BoscardiniteHide

Formula:
TlPb4(Sb7As2)S18

It is possible that the formula extends to AgTl2Pb6(Sb15As4)Σ19S36.
IMA Formula:
TlPb4(Sb7As2)Σ=9S18

Crystallography of BoscardiniteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 8.0929(4) Å, b = 8.7610(5) Å, c = 22.4971(11) Å
α = 90.868(4)°, β = 97.247(4)°, γ = 90.793(4)°
Ratio:
a:b:c = 0.924 : 1 : 2.568
Unit Cell V:
1582 ų
Z:
2
Morphology:
Millimeter-sized mass.
Twinning:
Polysynthetic twinning.

Type Occurrence of BoscardiniteHide

Geological Setting of Type Material:
An almost conformable lens characterized by a distinct zoning, with pyrite + barite at the bottom, and iron oxides (magnetite and hematite) + barite at the top, with accessory sulfides and sulfosalts.

Relationship of Boscardinite 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
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
LiveingitePb9As13S28Mon.
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
VeenitePb2(Sb,As)2S5Mon. 2 : P21

Common AssociatesHide

Associated Minerals Based on Photo Data:
Pyrite1 photo of Boscardinite associated with Pyrite on mindat.org.

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.

References for BoscardiniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Orlandi, P., Biagioni, C., Bonaccorsi, E., Moëlo, Y., Paar, W.H. (2012): Lead-antomony sulfosalts from Tuscany (Italy). XII. Boscardinite, TlPb4(Sb7As2){sum}9S18, a new species from Monte Arsiccio mine: Occurrence and crystal structure. Canadian Mineralogist, 50, 235-251.
Biagioni, C. & Moëlo, Y. (2017): Lead-antimony sulfosalts from Tuscany (Italy). XVIII. New data on the crystal-chemistry of boscardinite. Mineralogical Magazine, 81, 47-60. [formula approaches AgTl3Pb4(Sb14As6)Σ20S36]

Internet Links for BoscardiniteHide

Localities for BoscardiniteHide

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.
France
 
  • Provence-Alpes-Côte d'Azur
    • Hautes-Alpes
      • La Chapelle-en-Valgaudemar (La Chapelle-en-Valgaudémar)
Topa, D., Makovicky, E., Favreau, G., Bourgoin, V., Boulliard, J.C., Zagler, G. and Putz, H. (2013) Jasrouxite, a new Pb–Ag–As–Sb member of the lillianite homologous series from Jas Roux, Hautes-Alpes, France. Eur. J. Mineral., 25, 1031–1038.
Italy (TL)
 
  • Tuscany
    • Lucca Province
      • Apuan Alps
        • Stazzema
          • Sant'Anna di Stazzema
Orlandi, P., Biagioni, C., Bonaccorsi, E., Moëlo, Y., Paar, W.H. (2012): Lead-antomony sulfosalts from Tuscany (Italy). XII. Boscardinite, TlPb4(Sb7As2){sum}9S18, a new species from Monte Arsiccio mine: Occurrence and crystal structure. Canadian Mineralogist , 50 , 235-251; Biagioni, C., Bonaccorsi, E., Moëlo, Y., & Orlandi, P. (2014). Mercury-arsenic sulfosalts from Apuan Alps (Tuscany, Italy). I. Routhierite,(Cu0. 8Ag0. 2) Hg2Tl (As1. 4Sb0. 6)∑= 2S6, from Monte Arsiccio mine: occurrence and crystal structure. European Journal of Mineralogy, 26(1), 163-170; Biagioni, C. & Moëlo, Y. (2017): Lead-antimony sulfosalts from Tuscany (Italy). XVIII. New data on the crystal-chemistry of boscardinite. Mineralogical Magazine, 81, 47-60.
Mineral and/or Locality  
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