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Fassinaite

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Lombardo 2 Mine, Monte Trisa Mines, Mercanti Valley, Torrebelvicino, Vicenza Province, Veneto, Italy
© Antonio Zordan

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Formula:
Pb
 
2
(S
 
2
O
 
3
)(CO
 
3
)
System:OrthorhombicColour:Colourless, white
Hardness:1½ - 2
Name:Named after Bruno Fassina (b. 1943) Italian mineral collector, who discovered the mineral at the Trentini mine in 2009.


One of the very few thiosulphate minerals.

May be visually similar to elongate anglesite.

Classification of Fassinaite

IMA status:Approved 2011
mindat.org URL:http://www.mindat.org/min-40169.html
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Type Occurrence of Fassinaite

Type Locality:Trentini Mine (Beata Maria Vergine Mine), Contrada Trentini, Torrebelvicino, Vicenza Province, Veneto, Italy
General Appearance of Type Material:Radiating aggregates of acicular, colourless crystals up to 0.2 mm long.
Place of Conservation of Type Material:Museum of Mineralogy of the Department of Geosciences at
the University of Padova, Italy, under catalogue number MMP M10008.
Geological Setting of type material:The mineralization is linked to Mid-Triassic calc-alkaline magmatism. Hydrothermal fluids related to volcanism deposited sulphides, baryte and Fe- and Mn-bearing minerals at the boundary between Ladinic volcanites and limestone of the Mount Spitz Formation. Supergene minerals including sulphates, carbonates and arsenates of Zn, Pb and Cu are very common.

Physical Properties of Fassinaite

Lustre:Adamantine
Diaphaneity (Transparency):Transparent, Translucent
Colour:Colourless, white
Streak:White
Hardness (Mohs):1½ - 2
Hardness Data:Estimated
Tenacity:Brittle
Cleavage:None Observed
Fracture:Irregular/Uneven
Density (calculated):6.084 g/cm3

Crystallography of Fassinaite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Pnma {P21/n 21/m 21/a}
Cell Parameters:a = 16.343(1) Å, b = 8.760(2) Å, c = 4.592(3) Å
Ratio:a:b:c = 1.866 : 1 : 0.524
Unit Cell Volume:V 657.4 ų
Z:2
Morphology:The crystals are acicular to prismatic [010], with a flattened diamond-shaped cross-section. The Austrian crystals are sufficiently well developed to allow determination of some of the crystal forms: the prism {101} is large and dominant, with a flat chisel-shaped {hk0} termination, possibly {110}. Small faces which are possibly {011} are rarely present. Further forms are minute and difficult to measure as they are commonly rounded.
Twinning:None observed.
X-Ray Powder Diffraction:
d-spacingIntensity
4.410 (39)
4.381 (59)
4.080 (64)
3.504 (75)
3.108 (100)
2.986 (82)
2.952 (49)
2.736 (60)

Chemical Properties of Fassinaite

Formula:
Pb
 
2
(S
 
2
O
 
3
)(CO
 
3
)
Essential elements:C, O, Pb, S
All elements listed in formula:C, O, Pb, S
Analytical Data:Average of 11 electron microprobe analyses (CO2 calculated from the stoichiometry).
PbO (77.1)
SO3 (12.0)
CO2 (7.60)
S(2-) (4.83)
O=S(2-) (-2.41)
Total (99.2)
Empirical Formula:
Pb
 
2.01
(S
 
1.82
O
 
3
)CO
 
3

Other Names for Fassinaite

Synonyms:
IMA2011-048Unnamed (Pb Thiosulphate Carbonate)
Other Languages:
German:Fassinait

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Fassinaite

Reference List:

- +
U. Kolitsch (2010): Pb2(S2O3)(CO3): The first naturally occurring thiosulphate carbonate and its atomic arrangement. Oral presentation, 20th General Meeting of the IMA (IMA2010), Budapest, Hungary, August 21-27; abstract in CD of Abstracts, p. 489.

Nestola, F., Bindi, L., Guastoni, A., Zorzi, F., Nasdala, L. (2011): Pb2(CO3)(S2O3), the first mineral with coexisting carbonate and thiosulfate groups from Trentini mine, Vicenza, Italy. Poster, Geoitalia 2011, Turin, Italy, September 19-23, 2011; abstract in Plinius 37, 308.

Bindi, L., Nestola, F., Guastoni, A., Zorzi, F. and Nasdala, L. (2011): Fassinaite, IMA 2011-048. CNMNC Newsletter No. 10, 2559.

Bindi, L., Nestola, F., Kolitsch, U., Guastoni, A. & Zorzi, F. (2011): Fassinaite, Pb2+2(S2O3)(CO3), the first mineral with coexisting thiosulphate and carbonate groups: description and crystal structure. Mineralogical Magazine, 75, 2721-2732.

U. Kolitsch, L. Bindi, F. Nestola, A. Guastoni, F. Zorzi and R. Poeverlein (2012): Fassinait, ein neues Bleimineral aus Italien, Österreich und Deutschland. Lapis 37 (1), 52-53; 62 (in German).

Internet Links for Fassinaite

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    • Localities for Fassinaite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? 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.
    Austria
     
    • Carinthia
      • Friesach - Hüttenberg area
        • Hüttenberg
          • Waitschach
    		Kolitsch, U., Brandstätter, F., Schreiber, F., Fink, R. & Auer, C. (2013): Die Mineralogie der weltweit einzigartigen Schlacken von Waitschach, Kärnten. Annalen des Naturhistorischen Museums in Wien, Serie A, 115, 19-87 (in German).
    • Salzburg
      • Saalfelden
        • Leogang
          • Hütten
            • Schwarzleograben
              • Schwarzleo District
    		U. Kolitsch (2010): Pb2(S2O3)(CO3): The first naturally occurring thiosulphate carbonate and its atomic arrangement. Oral presentation, 20th General Meeting of the IMA (IMA2010), Budapest, Hungary, August 21-27; abstract in CD of Abstracts, p. 489; Bindi, L., Nestola, F., Kolitsch, U., Guastoni, A. & Zorzi, F. (2011): Fassinaite, Pb2+2(S2O3)(CO3), the first mineral with coexisting thiosulphate and carbonate groups: description and crystal structure. Mineralogical Magazine, 75, 2721-2732.
    Bindi, L., Nestola, F., Kolitsch, U., Guastoni, A. & Zorzi, F. (2011): Fassinaite, Pb2+2(S2O3)(CO3), the first mineral with coexisting thiosulphate and carbonate groups: description and crystal structure. Mineralogical Magazine, 75, 2721-2732; U. Kolitsch, L. Bindi, F. Nestola, A. Guastoni, F. Zorzi and R. Poeverlein (2012): Fassinait, ein neues Bleimineral aus Italien, Österreich und Deutschland. Lapis 37 (1), 52-53; 62 (in German).
    U. Kolitsch, L. Bindi, F. Nestola, A. Guastoni, F. Zorzi and R. Poeverlein (2012): Fassinait, ein neues Bleimineral aus Italien, Österreich und Deutschland. Lapis 37 (1), 52-53; 62 (in German).
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Schapbach
          • Wildschapbach valley
    		U. Kolitsch (2010): Pb2(S2O3)(CO3): The first naturally occurring thiosulphate carbonate and its atomic arrangement. Oral presentation, 20th General Meeting of the IMA (IMA2010), Budapest, Hungary, August 21-27; abstract in CD of Abstracts, p. 489; Bindi, L., Nestola, F., Kolitsch, U., Guastoni, A. & Zorzi, F. (2011): Fassinaite, Pb2+2(S2O3)(CO3), the first mineral with coexisting thiosulphate and carbonate groups: description and crystal structure. Mineralogical Magazine, 75, 2721-2732; U. Kolitsch, L. Bindi, F. Nestola, A. Guastoni, F. Zorzi and R. Poeverlein (2012): Fassinait, ein neues Bleimineral aus Italien, Österreich und Deutschland. Lapis 37 (1), 52-53; 62 (in German).
    Italy
     
    • Veneto
      • Vicenza Province
        • Torrebelvicino
          • Contrada Trentini
    		Nestola, F., Bindi, L., Guastoni, A., Zorzi, F., Nasdala, L. (2011): Pb2(CO3)(S2O3), the first mineral with coexisting carbonate and thiosulfate groups from Trentini mine, Vicenza, Italy. Poster, Geoitalia 2011, Turin, Italy, September 19-23, 2011; abstract in Plinius 37, 308.; Bindi, L., Nestola, F., Guastoni, A., Zorzi, F. and Nasdala, L. (2011): Fassinaite, IMA 2011-048. CNMNC Newsletter No. 10, 2559; Bindi, L., Nestola, F., Kolitsch, U., Guastoni, A. & Zorzi, F. (2011): Fassinaite, Pb2+2(S2O3)(CO3), the first mineral with coexisting thiosulphate and carbonate groups: description and crystal structure. Mineralogical Magazine, 75, 2721-2732.
          • Mercanti Valley
    		Zordan, A., Rocchetti, I., Boscardin, M. & Zorzi, F. (2012): Fassinaite del Monte Trisa, un nuovo ritrovamento nel Vicentino. Rivista Mineralogica Italiana, 2/2012, 100-109
    Pegoraro, S. (2012): Miniere e Minerali dell'Alto Vicentino. I Monti d'Oro. AMI, Ed., Cremona, (in press).
    UK
     
    • Scotland
      • Strathclyde (Lanarkshire)
        • South Lanarkshire
          • Leadhills
    		Steve Rust collection (SXRD-analysed by Uwe Kolitsch)
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