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Carducciite

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Formula:
(Ag2Sb2)Pb12(As,Sb)16S40
Colour:
black
Lustre:
Metallic
Hardness:
2½ - 3
Specific Gravity:
5.56 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
The name is for the type locality, Valdicastello Carducci.
Sb-rich isotype of rathite.
Very closely related to barikaite.


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Classification of CarducciiteHide

Approved
2.HB.

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
B : With Cu, Ag, Fe, Sn and Pb

Physical Properties of CarducciiteHide

Metallic
Transparency:
Opaque
Colour:
black
Streak:
black
Hardness:
2½ - 3 on Mohs scale
Hardness:
VHN10=61 kg/mm2 - Vickers
Tenacity:
Brittle
Fracture:
Conchoidal
Density:
5.56 g/cm3 (Calculated)

Optical Data of CarducciiteHide

Type:
Anisotropic
Anisotropism:
greyish to light-blue rotation tint
Bireflectance:
light grey to a slightly greenish grey
Colour in reflected light:
dark grey
Internal Reflections:
very weak and deep red in color
Pleochroism:
Weak
Comments:
light grey to a slightly greenish grey

Chemical Properties of CarducciiteHide

Formula:
(Ag2Sb2)Pb12(As,Sb)16S40
IMA Formula:
(AgSb)Pb6(As,Sb)8S20

Crystallography of CarducciiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 8.4909(3) Å, b = 8.0227(3) Å, c = 25.3957(9) Å
γ = 100.382(2)°
Ratio:
a:b:c = 1.058 : 1 : 3.165

Warning: deg2rad() expects parameter 1 to be float, string given in /home/mindat/www/include.php on line 9239
Unit Cell V:
0.00 ų (Calculated from Unit Cell)
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.689(
3.416(
3.125(
2.989(
2.894(
2.753(
2.250(
Comments:
From Type Description.

Type Occurrence of CarducciiteHide

General Appearance of Type Material:
prismatic crystals, up to 0.5 mm long
Place of Conservation of Type Material:
Type material is deposited in the collections of the collections of the Museo di Storia Naturale e del Territorio, Universita` di Pisa, Calci (Pisa), Italy, catalogue number 19646
Geological Setting of Type Material:
barite - pyrite deposit
Associated Minerals at Type Locality:

Synonyms of CarducciiteHide

Relationship of Carducciite 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
BoscardiniteTlPb4(Sb7As2)S18Tric. 1 : P1
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

Related Minerals - Nickel-Strunz GroupingHide

2.HB.05aAikinitePbCuBiS3Orth. mmm (2/m 2/m 2/m) : Pnma
2.HB.05aFriedrichitePb5Cu5Bi7S18Orth. mm2
2.HB.05aGladitePbCuBi5S9Orth. mmm (2/m 2/m 2/m)
2.HB.05aHammaritePb2Cu2Bi4S9Orth.
2.HB.05cJaskólskiiteCuxPb2+x(Sb,Bi)2-xS5 (x ~ 0.15)Orth.
2.HB.05aKrupkaitePbCuBi3S6Orth.
2.HB.05aLindströmitePb3Cu3Bi7S15Orth. mmm (2/m 2/m 2/m)
2.HB.05bMeneghinitePb13CuSb7S24Orth. mmm (2/m 2/m 2/m)
2.HB.05aPekoitePbCuBi11(S,Se)18Orth.
2.HB.05aEmilitePb2.7Cu2.7Bi5.3S12Orth. mm2
2.HB.05UM2000-46-S:BiCuPbCu0.33Pb0.33Bi7.67S12
2.HB.05aSalzburgitePb1.6Cu1.6Bi6.4S12Orth. mm2
2.HB.05UM1990-54-Se:BiCuPbCuPb(Ni,Co)0.3Bi3Se6
2.HB.05aPaaritePb1.7Cu1.7Bi6.3S12Orth. mmm (2/m 2/m 2/m)
2.HB.10cEclarite(Cu,Fe)Pb9Bi12S28Orth. mmm (2/m 2/m 2/m) : Pnma
2.HB.10bGiessenitePb27Cu2(Bi,Sb)19S57Mon. 2/m
2.HB.10bIzoklakeitePb27(Cu,Fe,Ag)2(Sb,Bi)19S57Orth.
2.HB.10aKobellitePb22Cu4(Bi,Sb)30S69Orth. mmm (2/m 2/m 2/m) : Pnnm
2.HB.10aTintinaitePb22Cu4(Sb,Bi)30S69Orth. mmm (2/m 2/m 2/m) : Pnnm
2.HB.15BenavidesitePb4MnSb6S14Mon. 2/m : P21/b
2.HB.15JamesonitePb4FeSb6S14Mon. 2/m : P21/b
2.HB.20dBerryiteCu3Ag2Pb3Bi7S16Mon. 2/m : P21/m
2.HB.20bBuckhorniteAuPb2BiTe2S3Orth.
2.HB.20aNagyágite[Pb3(Pb,Sb)3S6](Au,Te)3Mon. 2/m : P21/m
2.HB.20eWatkinsoniteCu2PbBi4(Se,S,Te)8Mon.
2.HB.20cMuseumite[Pb2(Pb,Sb)2S8][(Te,Au)2]Mon. 2
2.HB.20eLitochlebiteAg2PbBi4Se8Mon. 2/m : P21/m

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 CarducciiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Biagioni, C., Orlandi, P. and Moëlo, Y. (2013): Carducciite, IMA 2013-006. CNMNC Newsletter No. 16, August 2013, page 2702; Mineralogical Magazine, 77, 2695-2709.
Biagioni, C., Orlandi, P., Moëlo, Y., & Bindi, L. (2014). Lead-antimony sulfosalts from Tuscany (Italy). XVI. Carducciite,(AgSb) Pb6 (As, Sb) 8S20, a new Sb-rich derivative of rathite from the Pollone mine, Valdicastello Carducci: occurrence and crystal structure. Mineralogical Magazine, 78(7), 1775-1793.

Internet Links for CarducciiteHide

Localities for CarducciiteHide

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.
Italy (TL)
 
  • Tuscany
    • Lucca Province
      • Apuan Alps
        • Pietrasanta
          • Valdicastello Carducci
Biagioni, C., Orlandi, P., Moëlo, Y., & Bindi, L. (2014). Lead-antimony sulfosalts from Tuscany (Italy). XVI. Carducciite,(AgSb) Pb6 (As, Sb) 8S20, a new Sb-rich derivative of rathite from the Pollone mine, Valdicastello Carducci: occurrence and crystal structure. Mineralogical Magazine, 78(7), 1775-1793.
Mineral and/or Locality  
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