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Carducciite

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

Classification of Carducciite

Approved
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http://www.mindat.org/min-43873.html
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Type Occurrence of Carducciite

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:

Physical Properties of Carducciite

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

Crystallography of Carducciite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Space Group 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
Unit Cell Volume:
V 0.00 ų (Calculated from Unit Cell)
Z:
2
X-Ray Powder Diffraction Data:
d-spacingIntensity
3.689(
3.416(
3.125(
2.989(
2.894(
2.753(
2.250(
Comments:
From Type Description.

Optical Data of Carducciite

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 Carducciite

Formula:
(Ag2Sb2)Pb12(As,Sb)16S40
All elements listed in formula:

Relationship of Carducciite to other Species

Member of:
Other Members of Group:
ArgentobaumhaueriteAg1.5Pb22As33.5S72
BarikaiteAg3Pb10(Sb8As11)S40
BaumhaueritePb12As16S36
BoscardiniteTlPb4(Sb7As2)S18
DufrénoysitePb2As2S5
ÉcrinsiteAgTl3Pb4As11Sb9S36
EnneasartoriteTl6Pb32As70S140
GuettarditePbAsSbS4
HendekasartoriteTl2Pb48As82S172
HeptasartoriteTl7Pb22As55S108
ParapierrotiteTlSb5S8
PhilrothiteTlAs3S5
PierrotiteTl2(Sb,As)10S16
RathiteAg2Pb12-xTlx/2As18+x/2S40
SartoritePbAs2S4
Twinnite Pb0.8Tl0.1Sb1.3As0.8S4
VeenitePb2(Sb,As)2S5

Other Names for Carducciite

Name in Other Languages:

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.

References for Carducciite

Reference List:
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 Carducciite

Localities for Carducciite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
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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