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Parasterryite

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About ParasterryiteHide

Formula:
Ag4Pb20Sb14As10S58
Colour:
Black
Lustre:
Metallic
Hardness:
3 - 3½
Specific Gravity:
5.747 (Calculated)
Crystal System:
Monoclinic
Name:
Name derives from the Greek 'para' for near, and sterryite, reflecting the close structural relationship between the two minerals.
Closely related to sterryite.


Classification of ParasterryiteHide

Approved
Approval Year:
2010
First Published:
2011
2.HC.40

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
C : With only Pb
3.5.12.2

3 : SULFOSALTS
5 : 2.5 < ø < 3

Physical Properties of ParasterryiteHide

Metallic
Transparency:
Opaque
Colour:
Black
Streak:
Black
Hardness:
3 - 3½ on Mohs scale
Hardness:
VHN25=196 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
Fracture:
Conchoidal
Density:
5.747 g/cm3 (Calculated)

Optical Data of ParasterryiteHide

Type:
Anisotropic
Anisotropism:
Distinct in air, strong in oil
Bireflectance:
Distinct
Colour in reflected light:
White
Internal Reflections:
None
Pleochroism:
Weak
Comments:
Greyish white to white, more distinct in oil

Chemical Properties of ParasterryiteHide

Formula:
Ag4Pb20Sb14As10S58
IMA Formula:
Ag4Pb20(Sb,As)24S58

Crystallography of ParasterryiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 8.3965(5) Å, b = 27.9540(7) Å, c = 43.8840(13) Å
β = 90.061(12)°
Ratio:
a:b:c = 0.3 : 1 : 1.57
Unit Cell V:
10,300.26 ų (Calculated from Unit Cell)
Twinning:
Commonly twinned on (001).

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.62 (100)
3.42 (45)
3.35 (95)
3.23 (65)
3.01 (45)
2.945 (85)
2.885 (80)
1.916 (45)

Type Occurrence of ParasterryiteHide

Place of Conservation of Type Material:
Museo di Storia Naturale e del Territorio, Universita` di Pisa, Italy, catalogue number 19347.
Museum of Mineralogy, Ecoles des Mines de Paris, catalogue, 82522.
Reference:
Moëlo, Y., Orlandi, P., Guillot-Deudon, C., Biagioni, C., Paar, W.H., Evain, M. (2011) Lead–antimony sulfosalts from Tuscany (Italy). XI. The new mineral parasterryite, Ag4Pb20(Sb14.5As9.5)S=24S58, and associated sterryite, Cu(Ag,Cu)3Pb19(Sb18-15As4-7)S=22(As–As)S56, from Pollone mine (Tuscany, Italy). Canadian Mineralogist: 49: 623-638.

Related Minerals - Nickel-Strunz GroupingHide

2.HC.05bArgentobaumhaueriteAg1.5Pb22As33.5S72Tric. 1 : P1
2.HC.05bBaumhaueritePb12As16S36Tric. 1 : P1
2.HC.05eChabournéiteTl4Pb2(Sb,As)20S34Tric. 1 : P1
2.HC.05dDufrénoysitePb2As2S5Mon. 2 : P21
2.HC.05aGuettarditePbAsSbS4Mon. 2/m : P21/b
2.HC.05cLiveingitePb9As13S28Mon.
2.HC.05fParapierrotiteTlSb5S8Mon. m
2.HC.05fPierrotiteTl2(Sb,As)10S16Orth. mm2 : Pna21
2.HC.05dRathiteAg2Pb12-xTlx/2As18+x/2S40Mon. 2/m : P21/b
2.HC.05aSartoritePbAs2S4Mon. 2/m : P21/m
2.HC.05aTwinnite Pb0.8Tl0.1Sb1.3As0.8S4Mon. 2/m
2.HC.05dVeenitePb2(Sb,As)2S5Mon. 2 : P21
2.HC.05gMarumoitePb32As40S92Mon. 2 : P21
2.HC.05eDalnegroite(Tl4Pb2)(As12Sb8)S34Tric. 1 : P1
2.HC.10aFülöppitePb3Sb8S15Mon. 2/m : B2/b
2.HC.10cHeteromorphitePb7Sb8S19Mon. 2/m : B2/b
2.HC.10bPlagionitePb5Sb8S17Mon. 2/m
2.HC.10dRayitePb8(Ag,Tl)2Sb8S21Mon.
2.HC.10dSemseyitePb9Sb8S21Mon. 2/m : B2/b
2.HC.15BoulangeritePb5Sb4S11Mon. 2/m : P21/b
2.HC.15FalkmanitePb3Sb2S6Mon.
2.HC.20RobinsonitePb4Sb6S13Mon. 2/m : P21/m
2.HC.25MoëloitePb6Sb6S14(S3)Orth. 2 2 2 : P21 21 2
2.HC.30DadsonitePb23Sb25S60ClTric. 1 : P1
2.HC.35OwyheeiteAg3+xPb10-2xSb11+xS28, -0.13 < x > +0.20Mon. 2/m : P21/b
2.HC.35ZoubekiteAgPb4Sb4S10Orth.

Related Minerals - Dana Grouping (8th Ed.)Hide

3.5.12.1IzoklakeitePb27(Cu,Fe,Ag)2(Sb,Bi)19S57Orth.
3.5.12.2GiessenitePb27Cu2(Bi,Sb)19S57Mon. 2/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 ParasterryiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Moëlo, Y., Orlandi, P., Guillot-Deudon, C., Biagioni, C., Paar, W.H. and Evain, M. (2010) Parasterryite, IMA 2010-033.CNMNC Newsletter, October 2010, page 900; Mineralogical Magazine: 74: 899-902.
Moëlo, Y., Orlandi, P., Guillot-Deudon, C., Biagioni, C., Paar, W.H., Evain, M. (2011) Lead–antimony sulfosalts from Tuscany (Italy). XI. The new mineral parasterryite, Ag4Pb20(Sb14.5As9.5)S=24S58, and associated sterryite, Cu(Ag,Cu)3Pb19(Sb18-15As4-7)S=22(As–As)S56, from Pollone mine (Tuscany, Italy). Canadian Mineralogist: 49: 623-638.
Moëlo, Y., Guillot-Deudon, C., Evain, M., Orlandi, P., Biagioni, C. (2012) Comparative modular analysis of two complex sulfosalt structures: sterryite, Cu(Ag,Cu)3Pb19-(Sb,As)22(As-As)S56, and parasterryite, Ag4Pb20(Sb,As)24S58. Acta Crystallographica: B68: 480-492.

Internet Links for ParasterryiteHide

Localities for ParasterryiteHide

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
Moëlo, Y., Orlandi, P., Guillot-Deudon, C., Biagioni, C., Paar, W.H., Evain, M. (2011). Lead–antimony sulfosalts from Tuscany (Italy). XI. The new mineral parasterryite, Ag4Pb20(Sb14.5As9.5)S=24S58, and associated sterryite, Cu(Ag,Cu)3Pb19(Sb18-15As4-7)S=22(As–As)S56, from Pollone mine (Tuscany, Italy). Canadian Mineralogist, 49, 623-638. ; Biagioni, C., Orlandi, P., Moëlo, Y., Pardini, S. & Passarino, G. (2012). Sterryite e parasterryite. I solfosali aciculari di piombo e argento della miniera del Pollone (Pietrasanta, Lucca). Rivista Mineralogica Italiana, 2/2012, 76-91; 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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