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Peretaite

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Pereta Mine, Pereta, Scansano, Grosseto Province, Tuscany, Italy
© Marco Barsanti

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Formula:
Ca(SbO)
 
4
(SO
 
4
)
 
2
(OH)
 
2
 · 2H
 
2
O
System:MonoclinicColour:Colourless
Hardness:3½ - 4
Name:From the type locality.
This page provides mineralogical data about Peretaite.

Classification of Peretaite

IMA status:Approved 1979
Strunz 8th edition ID:6/D.12-10
Nickel-Strunz 10th (pending) edition ID:7.DF.45

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
F : With large and medium-sized cations
Dana 8th edition ID:31.6.4.1

31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
6 : (AB)5(XO4)2Zq·xH2O
Hey's CIM Ref.:25.8.3

25 : Sulphates
8 : Sulphates of Sb, V, Cr and U
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Type Occurrence of Peretaite

Type Locality:Pereta Mine, Pereta, Scansano, Grosseto Province, Tuscany, Italy
Place of Conservation of Type Material:Smithsonian Museum, Washington DC 148481, 148482
Year of Discovery:1979

Occurrences of Peretaite

Geological Setting:Formed by the action of sulfuric acid on oxidizing stibnite deposits.

Physical Properties of Peretaite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:Colourless
Comment:Can be pink due to encrustations of valentinite
Hardness (Mohs):3½ - 4
Hardness (Vickers):VHN15=170 - 190 kg/mm2
Cleavage:Perfect
Perfect on {100}
Density (calculated):4.06 g/cm3
Comment:Measured > 3.8

Crystallography of Peretaite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/b {B1 1 2/b} {C2/c} {C1 2/c 1}
Cell Parameters:a = 24.665(4) Å, b = 5.6006(9) Å, c = 10.185(1) Å
β = 95.98(1)°
Ratio:a:b:c = 4.404 : 1 : 1.819
Unit Cell Volume:V 1,399.29 ų (Calculated from Unit Cell)
Z:4
Morphology:Divergent sprays of laths, botyroidal, massive.
Twinning:Very common on {100}

Optical Data of Peretaite

Type:Biaxial (+)
RI values: nα = 1.841(1) nγ = 1.935(1)
Maximum Birefringence:δ = 0.094

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:relatively strong
Comments:Beta not determined. 2V is very large

Chemical Properties of Peretaite

Formula:
Ca(SbO)
 
4
(SO
 
4
)
 
2
(OH)
 
2
 · 2H
 
2
O
Essential elements:Ca, H, O, S, Sb
All elements listed in formula:Ca, H, O, S, Sb

Relationship of Peretaite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
7.DF.05Uklonskovite
NaMg(SO
 
4
)F · 2H
 
2
O
7.DF.10Kainite
KMg(SO
 
4
)Cl · 3H
 
2
O
7.DF.15Natrochalcite
NaCu
 
2
(SO
 
4
)
 
2
(OH) · 2H
 
2
O
7.DF.20Metasideronatrite
Na
 
2
Fe(SO
 
4
)
 
2
(OH) · H
 
2
O
7.DF.20Sideronatrite
Na
 
2
Fe(SO
 
4
)
 
2
(OH) · 3H
 
2
O
7.DF.25Despujolsite
Ca
 
3
Mn
4+
 
(SO
 
4
)
 
2
(OH)
 
6
 · 3H
 
2
O
7.DF.25Fleischerite
Pb
 
3
Ge(SO
 
4
)
 
2
(OH)
 
6
 · 3H
 
2
O
7.DF.25Schaurteite
Ca
 
3
Ge(SO
 
4
)
 
2
(OH)
 
6
 · 4H
 
2
O
7.DF.25Mallestigite
Pb
 
3
Sb
5+
 
(SO
 
4
)(AsO
 
4
)(OH)
 
6
 · 3H
 
2
O
7.DF.30Slavíkite
(H
 
3
O
+
 
)
 
3
Mg
 
6
Fe
 
15
(SO
 
4
)
 
21
(OH)
 
18
 · 99H
 
2
O
7.DF.35Metavoltine
Na
 
6
K
 
2
FeFe
 
6
(SO
 
4
)
 
12
O
 
2
 · 18H
 
2
O
7.DF.40Lannonite
HCa
 
4
Mg
 
2
Al
 
4
(SO
 
4
)
 
8
F
 
9
 · 32H
 
2
O
7.DF.40Vlodavetsite
AlCa
 
2
(SO
 
4
)
 
2
F
 
2
Cl · 4H
 
2
O
7.DF.50Gordaite
NaZn
 
4
(SO
 
4
)(OH)
 
6
Cl · 6H
 
2
O
7.DF.55Clairite
(NH
 
4
)
 
2
Fe
 
3
(SO
 
4
)
 
4
(OH)
 
3
 · 3H
 
2
O
7.DF.60Arzrunite
Cu
 
4
Pb
 
2
(SO
 
4
)(OH)
 
4
Cl
 
6
 · 2H
 
2
O (?)
7.DF.65Elyite
Pb
 
4
Cu(SO
 
4
)O
 
2
(OH)
 
4
 · H
 
2
O
7.DF.70Yecoraite
Fe
3+
3
Bi
 
5
(Te
6+
 
O
 
4
)
 
2
(Te
4+
 
O
 
3
)O
 
9
 · 9H
 
2
O
7.DF.75Riomarinaite
Bi(SO
 
4
)(OH) · H
 
2
O
7.DF.80Dukeite
Bi
3+
24
Cr
6+
8
O
 
57
(OH)
 
6
 · 3H
 
2
O
7.DF.85Xocolatlite
Ca
 
2
Mn
4+
2
(Te
6+
 
O
 
6
)
 
2
 · H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
25.8.1Klebelsbergite
(SbO)
 
4
(SO
 
4
)(OH)
 
2
25.8.2Coquandite
(SbO)
 
6
(SO
 
4
)O
 
2
 · H
 
2
O
25.8.4Cannonite
Bi
 
2
(SO
 
4
)O(OH)
 
2
25.8.5Minasragrite
(V
4+
 
O)(SO
 
4
) · 5H
 
2
O
25.8.6Stanleyite
(V
4+
 
O)(SO
 
4
) · 6H
 
2
O
25.8.7Redingtonite
(Fe
2+
 
,Mg,Ni)(Cr,Al)
 
2
(SO
 
4
)
 
4
·22H
 
2
O
25.8.8Metauranopilite
(UO
 
2
)
 
6
(SO
 
4
)(OH)
 
10
 · 5H
 
2
O
25.8.9Uranopilite
(UO
 
2
)
 
6
(SO
 
4
)O
 
2
(OH)
 
6
 · 14H
 
2
O
25.8.10Natrozippeite
Na
 
5
(UO
 
2
)
 
8
(SO
 
4
)
 
4
O
 
5
(OH)
 
3
 · 12H
 
2
O
25.8.11Zippeite
K
 
3
(UO
 
2
)
 
4
(SO
 
4
)
 
2
O
 
3
(OH) · 3H
 
2
O
25.8.12Johannite
Cu(UO
 
2
)
 
2
(SO
 
4
)
 
2
(OH)
 
2
 · 8H
 
2
O
25.8.13Magnesiozippeite
Mg(UO
 
2
)
 
2
(SO
 
4
)O
 
2
 · 3.5H
 
2
O
25.8.14Zinczippeite
Zn(UO
 
2
)
 
2
(SO
 
4
)O
 
2
 · 3.5H
 
2
O

Other Names for Peretaite

Synonyms:
IMA1979-068
Other Languages:
German:Peretait
Russian:Перетаит
Spanish:Peretaita

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 Peretaite

Reference List:

- +
American Mineralogist (1980): 65: 930-939.

American Mineralogist (1980): 65: 940-946.

Internet Links for Peretaite

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    • Localities for Peretaite

    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.
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    (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.
    Italy
     
    • Tuscany
      • Grosseto Province
        • Scansano
          • Pereta
    		Cipriani, et al (1980); Am.Min.:65:936(1980); Min.Rec.:15 (1): 19-26.
      • Pisa Province
        • Pomarance
    		Nannoni R., Capperi M., 1985. I minerali della "Sorgente Solfurea" di Micciano (PI). Quad. Mus. Storia Nat. Livorno, 6: 11-25.; Duchi G. (1983) - Il deposito antimonifero di Micciano(Comune di Pomarance, Pisa)- Atti Società Toscana di Scienze Naturali - Memorie, serie A, 90, pp. 141-163; Bardi, T., Biagioni, C., & Orlandi, P. (2009). Aggiornamento sui minerali della Sorgente Solfurea di Micciano (Pomarance, Pisa, Toscana). MICRO (località), 1/2009, 261-276.
      • Siena Province
        • Chiusdino
    		Mineralogical Record, 15 (1), 27-36.
    Luxembourg
     
    • Goesdorf commune
      • Goesdorf
    		Simon Philippo analysis (to be published); [Filella M., Philippo S., Belzile N., Chen Y. and Quentel F. (2009) Natural attenuation processes applying to antimony: A study in the abandoned antimony mine in Goesdorf, Luxembourg - Science of the total environment (in press)]
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