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Boscardinite

A valid IMA mineral species

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Photos of Boscardinite (2)

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Boscardinite, etc.

Monte Arsiccio Mine, Sant'Anna di Stazzema, Stazzema, Lucca Province, Tuscany, Italy

Boscardinite

Monte Arsiccio Mine, Sant'Anna di Stazzema, Stazzema, Lucca Province, Tuscany, Italy

Boscardinite, etc.

Monte Arsiccio Mine, Sant'Anna di Stazzema, Stazzema, Lucca Province, Tuscany, Italy

Boscardinite

Monte Arsiccio Mine, Sant'Anna di Stazzema, Stazzema, Lucca Province, Tuscany, Italy

Boscardinite, etc.

Monte Arsiccio Mine, Sant'Anna di Stazzema, Stazzema, Lucca Province, Tuscany, Italy

Boscardinite

Monte Arsiccio Mine, Sant'Anna di Stazzema, Stazzema, Lucca Province, Tuscany, Italy

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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 (Calculated)

Crystal System:

Triclinic

Member of:

Sartorite Group

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.

Type Locality:

ⓘ Monte Arsiccio Mine, Sant'Anna di Stazzema, Stazzema, Lucca Province, Tuscany, Italy

Chemically related to chabournéite, jentschite, and protochabournéite.

Unique IdentifiersHide

Mindat ID:

41957

Long-form identifier:

mindat:1:1:41957:8

GUID
(UUID V4):

ffba7a10-1c4e-4441-a62d-e7ea7a3d5714

IMA Classification of BoscardiniteHide

IMA status:

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 BoscardiniteHide

Strunz-mindat (2024):

2.HD.

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

Mineral SymbolsHide

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 BoscardiniteHide

Lustre:

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 BoscardiniteHide

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 BoscardiniteHide

Mindat Formula:

TlPb₄(Sb₇As₂)S₁₈

It is possible that the formula extends to AgTl₂Pb₆(Sb₁₅As₄)_Σ19S₃₆.

Elements listed:

As, Pb, S, Sb, Tl - search for minerals with similar chemistry

Crystallography of BoscardiniteHide

Crystal System:

Triclinic

Class (H-M):

1 - Pinacoidal

Space Group:

Setting:

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 Å³

Morphology:

Millimeter-sized mass.

Twinning:

Polysynthetic twinning.

Crystal StructureHide

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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

data_global
_chemical_name_mineral 'Boscardinite'
loop_
_publ_author_name
'Orlandi P'
'Biagioni C'
'Bonaccorsi E'
'Moelo Y'
'Paar W H'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 50 
_journal_year 2012
_journal_page_first 235
_journal_page_last 251
_publ_section_title
;
 Lead-antimony sulfosalts from Tuscany (Italy). XII. Boscardinite,
 TlPb4(Sb7As2)S9S18, a new mineral species from the Monte Arsiccio mine:
 Occurrence and crystal structure
;
_database_code_amcsd 0019212
_chemical_compound_source 'Monte Arsiccio, near Sant'Anna di Stazzema, Apuan Alps, Tuscany, Italy'
_chemical_formula_sum 'Ag.29 Tl1.23 Pb2.956 Sb7.794 As1.73 S18'
_cell_length_a 8.0929
_cell_length_b 8.7610
_cell_length_c 22.497
_cell_angle_alpha 90.868
_cell_angle_beta 97.247
_cell_angle_gamma 90.793
_cell_volume 1581.957
_exptl_crystal_density_diffrn      5.355
_symmetry_space_group_name_H-M 'P -1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
Ag10b   0.47680   0.63110   0.41280   0.29000   0.02810
Tl1   0.11091   0.63591   0.16858   0.80000   0.03000
Pb1   0.11091   0.63591   0.16858   0.20000   0.03000
Pb2a   0.88760   0.88720   0.82140   0.27000   0.03650
Tl2a   0.88760   0.88720   0.82140   0.11000   0.03650
Pb2b   0.84810   0.84890   0.82670   0.50000   0.03650
Tl2b   0.84810   0.84890   0.82670   0.12000   0.03650
Pb3   0.66435   0.65298   0.25913   0.80000   0.03540
Tl3   0.66435   0.65298   0.25913   0.20000   0.03540
Pb4   0.64766   0.14848   0.25445   1.00000   0.03570
Sb1   0.54560   0.39690   0.09929   1.00000   0.01430
Sb2   0.81920   0.10370   0.02078   1.00000   0.01320
Sb3   0.48670   0.11740   0.88652   0.71000   0.01470
As3   0.48670   0.11740   0.88652   0.29000   0.01470
As4   0.17270   0.36020   0.99928   0.75000   0.01620
Sb4   0.17270   0.36020   0.99928   0.25000   0.01620
Sb5   0.06850   0.38800   0.33165   0.78000   0.01530
As5   0.06850   0.38800   0.33165   0.22000   0.01530
Sb6   0.10910   0.85270   0.34360   1.00000   0.02180
Sb7   0.84640   0.34200   0.46700   1.00000   0.01940
Sb8   0.78840   0.89960   0.44625   0.53000   0.02300
As8   0.78840   0.89960   0.44625   0.47000   0.02300
Sb9a   0.43230   0.15710   0.41070   0.81400   0.01740
Pb9b   0.39330   0.12610   0.41820   0.18600   0.01740
Sb10a   0.47340   0.59940   0.42400   0.71000   0.02810
S1   0.36000   0.17990   0.03690   1.00000   0.02820
S2   0.92220   0.69190   0.39830   1.00000   0.01860
S3   0.28440   0.91350   0.86160   1.00000   0.01240
S4   0.90300   0.38720   0.23590   1.00000   0.02420
S5   0.62460   0.35550   0.37740   1.00000   0.01480
S6   0.67120   0.16940   0.51680   1.00000   0.01690
S7   0.98680   0.08760   0.93160   1.00000   0.01020
S8   0.92330   0.88120   0.25320   1.00000   0.01790
S9   0.32380   0.56470   0.04900   1.00000   0.01440
S10   0.29320   0.42760   0.47220   1.00000   0.02000
S11   0.97000   0.08690   0.41700   1.00000   0.02690
S12   0.98490   0.33140   0.07040   1.00000   0.01430
S13   0.57140   0.92910   0.36400   1.00000   0.02500
S14   0.25310   0.19000   0.30630   1.00000   0.01680
S15   0.69690   0.67260   0.13860   1.00000   0.01420
S16   0.25420   0.59910   0.31280   1.00000   0.01840
S17   0.42260   0.37020   0.19280   1.00000   0.01860
S18   0.59450   0.10110   0.79220   1.00000   0.02020

X-Ray Powder DiffractionHide

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 EnvironmentHide

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 BoscardiniteHide

Type Locality:

ⓘ Monte Arsiccio Mine, Sant'Anna di Stazzema, Stazzema, Lucca Province, Tuscany, Italy

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:

Zinkenite

Stibnite

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.

Download:

https://rruff.info/rruff_1.0/uploads/CM50_235.pdf

Relationship of Boscardinite to other SpeciesHide

Member of:

Sartorite Group

Other Members of this group:

Argentobaumhauerite	Ag_1.5Pb₂₂As_33.5S₇₂	Tric. 1 : P1
Argentodufrénoysite	Ag₃Pb₂₆As₃₅S₈₀	Tric. 1 : P1
Argentoliveingite	Ag_3+xPb_36-2xAs_51+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(Sb_0.56As_0.44)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	Ag₂Pb_12-xTl_x/2As_18+x/2S₄₀	Mon. 2/m : P2₁/b
Sartorite	PbAs₂S₄	Mon. 2/m : P2₁/m
Twinnite	Pb_0.8Tl_0.1Sb_1.3As_0.8S₄	Mon. 2/m
Veenite	Pb₁₆Sb_9-xAs_7+xS₄₀, x ~ 0-0.5	Mon. 2 : P2₁

Common AssociatesHide

Associated Minerals Based on Photo Data:

1 photo of Boscardinite associated with Pyrite

FeS₂

Related Minerals - Strunz-mindat Grouping Hide

2.HD.	Enneasartorite	Tl₆Pb₃₂As₇₀S₁₄₀	Mon. 2/m : P2₁/b
2.HD.	Gungerite	TlAs₅Sb₄S₁₃	Orth. mmm (2/m 2/m 2/m) : Pbcn
2.HD.	Shimenite	Tl₅Sb_21-yAs_yS₃₄	Tric. 1 : P1
2.HD.	Dewitite	Ag_zTl_10-x-zPb_2xSb_42-x-yAs_yS₆₈	Tric. 1 : P1
2.HD.	Vallouiseite	Ag₃Tl_21.5PbSb₆₃As_41.5S₁₇₀	Tric. 1 : P1
2.HD.	Buynite	TlPb₁₄As₁₇S₄₀	Mon. 2 : P2₁
2.HD.	Giuşcăite	Ag₂Tl₄Pb₄As₂₀Sb₂S₄₀	Mon. m
2.HD.05e	Chabournéite	Ag_zTl_8-x-zPb_4+2xSb_40-x-yAs_yS₆₈ with 0.00 < x < 0.40(9), 16.15(3)< y < 19.11(10), 0.04(4) < z < 0.11(6)	Tric. 1 : P1
2.HD.05	Lorándite	TlAsS₂	Mon. 2/m : P2₁/b
2.HD.05	Weissbergite	TlSbS₂	Tric. 1 : P1
2.HD.05e	Dalnegroite	(Tl₄Pb₂)(As₁₂Sb₈)S₃₄	Tric. 1 : P1
2.HD.15	Christite	TlHgAsS₃	Orth. mmm (2/m 2/m 2/m) : Cmca
2.HD.15	Richardsollyite	TlPbAsS₃	Mon. 2/m : P2₁/b
2.HD.20	Jankovićite	Tl₅Sb₉(As,Sb)₄S₂₂	Tric. 1 : P1
2.HD.25	Rebulite	Tl₅Sb₅As₈S₂₂	Mon. 2/m : P2₁/b
2.HD.30	Imhofite	Tl_5.8As_15.4S₂₆	Mon. 2/m
2.HD.35	Edenharterite	PbTlAs₃S₆	Orth. mm2 : Fdd2
2.HD.40	Jentschite	TlPbAs₂SbS₆	Mon. 2/m
2.HD.45	Hutchinsonite	TlPbAs₅S₉	Orth. mmm (2/m 2/m 2/m) : Pbca
2.HD.45	Protochabournéite	Tl_4-xPb_2+2xSb_20-x-yAs_yS₃₄ with 0.02(2) < x < 0.34(2), 5.71(9) < y < 6.69(9)	Tric. 1 : P1
2.HD.50	Bernardite	TlAs₅S₈	Mon. 2/m : P2₁/b
2.HD.55	Sicherite	TlAg₂(As,Sb)₃S₆	Orth.
2.HD.55	Geuerite	Ag₂Tl₄Pb₄As₂₂S₄₀	Mon. 2/m : P2₁/b
2.HD.60	Gabrielite	Tl₆Ag₃Cu₆(As,Sb)₉S₂₁	Tric. 1 : P1
2.HD.65	Tsygankoite	Mn₈Tl₈Hg₂(Sb₂₁Pb₂Tl)S₄₈	Mon. 2/m : B2/m
2.HD.70	Drechslerite	Tl₄(Sb_4-xAs_x)S₈ (1 < x < 2)	Tric. 1 : P1

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 BoscardiniteHide

mindat.org URL:

https://www.mindat.org/min-41957.html
Please feel free to link to this page.

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External Links:

Look for Boscardinite on Webmineral

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Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

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References for BoscardiniteHide

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

Biagioni, Cristian, Moëlo, Yves (2017) Lead-antimony sulfosalts from Tuscany (Italy) XVIII. New data on the crystal-chemistry of boscardinite. Mineralogical Magazine, 81 (1) 47-60 doi:10.1180/minmag.2016.080.068 [formula approaches AgTl3Pb4(Sb14As6)Σ20S36]

(2023) Boscardinite. Handbook of Mineralogy. Mineralogical Society of America

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 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.


France
Provence-Alpes-Côte d'Azur Hautes-Alpes Gap La Chapelle-en-Valgaudemar ⓘ Jas Roux	Topa et al. (2014)

Italy (TL)
Tuscany Lucca Province Stazzema Sant'Anna di Stazzema ⓘ Monte Arsiccio Mine (TL)	Williams et al. (2011) +3 other references

Russia
Sverdlovsk Oblast Serovsky District Turya river Tur'insk ⓘ Vorontsovskoe deposit (Vorontsovsk gold deposit; Vorontsovka deposit)	Stepanov +9 other references

Boscardinite

About BoscardiniteHide

Unique IdentifiersHide

IMA Classification of BoscardiniteHide

Classification of BoscardiniteHide

Mineral SymbolsHide

Physical Properties of BoscardiniteHide

Optical Data of BoscardiniteHide

Chemistry of BoscardiniteHide

Crystallography of BoscardiniteHide

Crystal StructureHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of BoscardiniteHide

Relationship of Boscardinite to other SpeciesHide

Common AssociatesHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for BoscardiniteHide

References for BoscardiniteHide

Localities for BoscardiniteHide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide