Boscardinite
A valid IMA mineral species
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About Boscardinite
Formula:
TlPb4(Sb7As2)S18
It is possible that the formula extends to AgTl2Pb6(Sb15As4)Σ19S36.
Colour:
Lead-grey
Lustre:
Metallic
Specific Gravity:
5.355 (Calculated)
Crystal System:
Triclinic
Member of:
Name:
After Matteo Boscardin (b. 29 October 1939), a mineral collector, for his contribution to the knowledge of regional mineralogy in Italy through the publication of over 100 papers.
Unique Identifiers
Mindat ID:
41957
Long-form identifier:
mindat:1:1:41957:8
GUID
(UUID V4):
(UUID V4):
ffba7a10-1c4e-4441-a62d-e7ea7a3d5714
IMA Classification of Boscardinite
Approved
IMA Formula:
TlPb4(Sb7As2)Σ=9S18
Approval year:
2011
First published:
2012
Type description reference:
Orlandi, P., Biagioni, C., Bonaccorsi, E., Moëlo, Y., Paar, W. H. (2012) Lead-antimony sulfosalts from Tuscany (Italy) XII. Boscardinite, TlPb4(Sb7As2)Σ9S18, a new mineral species from the Monte Arsiccio mine: Occurrence and crystal structure. The Canadian Mineralogist, 50 (2) 235-251 doi:10.3749/canmin.50.2.235
Classification of Boscardinite
2.HD.
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
D : With Tl
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
D : With Tl
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Bcd | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Boscardinite
Metallic
Transparency:
Opaque
Colour:
Lead-grey
Streak:
Black
Hardness Data:
Could not be measured
Fracture:
Conchoidal
Density:
5.355 g/cm3 (Calculated)
Optical Data of Boscardinite
Anisotropism:
Distinct, shades of gray
Bireflectance:
Distinct
Reflectivity:
Wavelength | R1 | R2 |
---|---|---|
400nm | 34.6% | 37.7% |
440nm | 34.2% | 39.4% |
480nm | 34.1% | 39.3% |
520nm | 32.7% | 38.5% |
546nm | 32.1% | 38.0% |
560nm | 31.9% | 37.8% |
589nm | 31.2% | 36.9% |
600nm | 31.0% | 36.9% |
640nm | 29.8% | 35.5% |
680nm | 28.4% | 34.3% |
700nm | 28.5% | 34.0% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 39.4%.
R1 shown in black, R2 shown in red
Colour in reflected light:
White
Internal Reflections:
None
Pleochroism:
Not Visible
Chemistry of Boscardinite
Mindat Formula:
TlPb4(Sb7As2)S18
It is possible that the formula extends to AgTl2Pb6(Sb15As4)Σ19S36.
It is possible that the formula extends to AgTl2Pb6(Sb15As4)Σ19S36.
Crystallography of Boscardinite
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)°
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.
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0019212 | Boscardinite | Orlandi P, Biagioni C, Bonaccorsi E, Moelo Y, Paar W H (2012) Lead-antimony sulfosalts from Tuscany (Italy). XII. Boscardinite, TlPb4(Sb7As2)S9S18, a new mineral species from the Monte Arsiccio mine: Occurrence and crystal structure The Canadian Mineralogist 50 235-251 | 2012 | Monte Arsiccio, near Sant'Anna di Stazzema, Apuan Alps, Tuscany, Italy | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.705 Å | (moderately strong) |
3.540 Å | (moderately strong) |
3.479 Å | (moderate) |
3.085 Å | (moderate) |
2.977 Å | (moderately strong) |
2.824 Å | (very strong) |
2.707 Å | (strong) |
2.324 Å | (moderately strong) |
2.176 Å | (moderately strong) |
Comments:
Monte Arsiccio mine, Tuscany, Italy. The data are from the type description.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
High-𝑇 alteration and/or metamorphism | |
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Geological Setting:
Mineralogical collection of the Museo di Storia Naturale e del Territorio, Università di Pisa, Via Roma 79, Calci (PI), Italy, with catalogue number 19349.
Type Occurrence of Boscardinite
General Appearance of Type Material:
Millimetric compact mass in a quartz vein embedded in dolomitic rocks.
Place of Conservation of Type Material:
Museo di Storia Naturale e del Territorio, Università di Pisa, Via Roma 79, Calci (PI), Italy, with catalogue number 19349.
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.
Associated Minerals at Type Locality:
Reference:
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. The Canadian Mineralogist: 50: 235-251.
Relationship of Boscardinite to other Species
Member of:
Other Members of this group:
Argentobaumhauerite | Ag1.5Pb22As33.5S72 | Tric. 1 : P1 |
Argentodufrénoysite | Ag3Pb26As35S80 | Tric. 1 : P1 |
Argentoliveingite | Ag3+xPb36-2xAs51+xS112 | Tric. 1 : P1 |
Barikaite | Ag3Pb10(Sb8As11)S40 | Mon. 2/m : P21/b |
Baumhauerite | Pb12As16S36 | Tric. 1 : P1 |
Bernarlottiite | Pb6(As5Sb3)S18 | Tric. 1 : P1 |
Carducciite | (Ag2Sb2)Pb12(As,Sb)16S40 | Mon. 2/m : P21/b |
Dekatriasartorite | TlPb58As97S204 | Mon. 2/m : P21/b |
Dufrénoysite | Pb2As2S5 | Mon. 2 : P21 |
Écrinsite | AgTl3Pb4As11Sb9S36 | Tric. 1 : P1 |
Enneasartorite | Tl6Pb32As70S140 | Mon. 2/m : P21/b |
Guettardite | Pb8(Sb0.56As0.44)16S32 | Mon. 2/m : P21/b |
Hendekasartorite | Tl2Pb48As82S172 | Mon. 2/m : P21/b |
Heptasartorite | Tl7Pb22As55S108 | Mon. 2/m : P21/b |
Hyršlite | Pb8As10Sb6S32 | Mon. 2 : P21 |
Incomsartorite | Tl6Pb144As246S516 | Mon. 2/m |
Interliveingite | AgPb18As25S56 | Mon. 2 : P21 |
Liveingite | Pb9As13S28 | Mon. 2 : P21 |
Parapierrotite | TlSb5S8 | Mon. m |
Philrothite | TlAs3S5 | Mon. 2/m : P21/b |
Pierrotite | Tl2(Sb,As)10S16 | Orth. mm2 : Pna21 |
Polloneite | AgPb46As26Sb23S120 | Mon. 2 : P21 |
Rathite | Ag2Pb12-xTlx/2As18+x/2S40 | Mon. 2/m : P21/b |
Sartorite | PbAs2S4 | Mon. 2/m : P21/m |
Twinnite | Pb0.8Tl0.1Sb1.3As0.8S4 | Mon. 2/m |
Veenite | Pb16Sb9-xAs7+xS40, x ~ 0-0.5 | Mon. 2 : P21 |
Common Associates
Related Minerals - Strunz-mindat Grouping
2.HD. | Enneasartorite | Tl6Pb32As70S140 |
2.HD. | Gungerite | TlAs5Sb4S13 |
2.HD. | Shimenite | Tl5Sb21-yAsyS34 |
2.HD. | Dewitite | AgzTl10-x-zPb2xSb42-x-yAsyS68 |
2.HD. | Vallouiseite | Ag3Tl21.5PbSb63As41.5S170 |
2.HD. | Buynite | TlPb14As17S40 |
2.HD. | Giuşcăite | Ag2Tl4Pb4As20Sb2S40 |
2.HD.05e | Chabournéite | AgzTl8-x-zPb4+2xSb40-x-yAsyS68 with 0.00 < x < 0.40(9), 16.15(3)< y < 19.11(10), 0.04(4) < z < 0.11(6) |
2.HD.05 | Lorándite | TlAsS2 |
2.HD.05 | Weissbergite | TlSbS2 |
2.HD.05e | Dalnegroite | (Tl4Pb2)(As12Sb8)S34 |
2.HD.15 | Christite | TlHgAsS3 |
2.HD.15 | Richardsollyite | TlPbAsS3 |
2.HD.20 | Jankovićite | Tl5Sb9(As,Sb)4S22 |
2.HD.25 | Rebulite | Tl5Sb5As8S22 |
2.HD.30 | Imhofite | Tl5.8As15.4S26 |
2.HD.35 | Edenharterite | PbTlAs3S6 |
2.HD.40 | Jentschite | TlPbAs2SbS6 |
2.HD.45 | Hutchinsonite | TlPbAs5S9 |
2.HD.45 | Protochabournéite | Tl4-xPb2+2xSb20-x-yAsyS34 with 0.02(2) < x < 0.34(2), 5.71(9) < y < 6.69(9) |
2.HD.50 | Bernardite | TlAs5S8 |
2.HD.55 | Sicherite | TlAg2(As,Sb)3S6 |
2.HD.55 | Geuerite | Ag2Tl4Pb4As22S40 |
2.HD.60 | Gabrielite | Tl6Ag3Cu6(As,Sb)9S21 |
2.HD.65 | Tsygankoite | Mn8Tl8Hg2(Sb21Pb2Tl)S48 |
2.HD.70 | Drechslerite | Tl4(Sb4-xAsx)S8 (1 < x < 2) |
Other Information
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 Boscardinite
mindat.org URL:
https://www.mindat.org/min-41957.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Boscardinite
Reference List:
Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2011) New minerals and nomenclature modifications approved in 2011. CNMNC Newsletter No 9. Mineralogical Magazine, 75 (4) 2535-2540 doi:10.1180/minmag.2011.075.4.2535
Orlandi, P., Biagioni, C., Bonaccorsi, E., Moëlo, Y., Paar, W. H. (2012) Lead-antimony sulfosalts from Tuscany (Italy) XII. Boscardinite, TlPb4(Sb7As2)Σ9S18, a new mineral species from the Monte Arsiccio mine: Occurrence and crystal structure. The Canadian Mineralogist, 50 (2) 235-251 doi:10.3749/canmin.50.2.235
Localities for Boscardinite
Locality List
- 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.
All localities listed without proper references should be considered as questionable.
France | |
| Topa et al. (2014) |
Italy (TL) | |
| Williams et al. (2011) +3 other references |
Russia | |
| Stepanov +9 other references |
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Monte Arsiccio Mine, Sant'Anna di Stazzema, Stazzema, Lucca Province, Tuscany, Italy