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Wattevilleite

Formula:
Na
 
2
Ca(SO
 
4
)
 
2
·4H
 
2
O (?)
System:OrthorhombicColour:White
Name:Named after baron Oscar de Watteville of Paris, France.
This page provides mineralogical data about Wattevilleite.

Classification of Wattevilleite

IMA status:Questionable/Doubtful
Explanation of status:XRD powder pattern (PDF 41-1360) is very similar to that of hexahydrite (Eur. J. Mineral, 2003, Beih., p. 5)
Strunz 8th edition ID:6/C.21-50
Nickel-Strunz 10th (pending) edition ID:7.CC.65

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
C : With medium-sized and large cations
Dana 8th edition ID:29.3.4.1

29 : HYDRATED ACID AND NORMAL SULFATES
3 : A2B(XO4)2·xH2O
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Type Occurrence of Wattevilleite

Type Locality:Einigkeit Mine, Bauersberg Mt., Bischofsheim, Rhön Mts, Franconia, Bavaria, Germany
General Appearance of Type Material:Tiny acicular white crystals
Geological Setting of type material:Pyritic lignite deposit.

Physical Properties of Wattevilleite

Lustre:Silky
Colour:White
Density (measured):1.81 g/cm3

Crystallography of Wattevilleite

Crystal System:Orthorhombic
Morphology:Minute acicular, in part twinned.

Optical Data of Wattevilleite

Type:Biaxial (-)
RI values: nα = 1.435 nβ = 1.455 nγ = 1.459
2V:Measured: 48° , Calculated: 46°
Maximum Birefringence:δ = 0.024

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:dispersion not observed

Chemical Properties of Wattevilleite

Formula:
Na
 
2
Ca(SO
 
4
)
 
2
·4H
 
2
O (?)
Essential elements:Ca, H, Na, O, S
All elements listed in formula:Ca, H, Na, O, S
Analyical Data:Water soluble. Astringent.
Relationship of Wattevilleite to other Species
Related Minerals - Nickel-Strunz Grouping):
7.CC.05Krausite
KFe(SO
 
4
)
 
2
·H
 
2
O
7.CC.10Amarillite
NaFe(SO
 
4
)
 
2
·6H
 
2
O
7.CC.10Tamarugite
NaAl(SO
 
4
)
 
2
·6H
 
2
O
7.CC.15Kalinite
KAl(SO
 
4
)
 
2
·11H
 
2
O Not confirmed
7.CC.15Mendozite
NaAl(SO
 
4
)
 
2
·11H
 
2
O
7.CC.20Lonecreekite
(NH
 
4
)Fe
3+
 
[SO
 
4
]
 
2
 · 12H
 
2
O
7.CC.20Alum-(K)
KAl[SO
 
4
]
 
2
 · 12H
 
2
O
7.CC.20Alum-(Na)
NaAl[SO
 
4
]
 
2
 · 12H
 
2
O
7.CC.20Tschermigite
(NH
 
4
)Al[SO
 
4
]
 
2
 · 12H
 
2
O
7.CC.20Lanmuchangite
Tl
+
 
Al[SO
 
4
]
 
2
 · 12H
 
2
O
7.CC.25Voltaite
K
 
2
Fe
2+
5
Fe
3+
3
Al[SO
 
4
]
 
12
 · 18H
 
2
O
7.CC.25Zincovoltaite
K
 
2
Zn
 
5
Fe
3+
3
Al[SO
 
4
]
 
12
 · 18H
 
2
O
7.CC.30Kröhnkite
Na
 
2
Cu(SO
 
4
)
 
2
·2H
 
2
O
7.CC.35Ferrinatrite
Na
 
3
Fe(SO
 
4
)
 
3
·3H
 
2
O
7.CC.40Goldichite
KFe(SO
 
4
)
 
2
·4H
 
2
O
7.CC.45Löweite
Na
 
12
Mg
 
7
(SO
 
4
)
 
13
7.CC.50Blödite
Na
 
2
Mg(SO
 
4
)
 
2
·4H
 
2
O
7.CC.50Nickelblödite
Na
 
2
(Ni,Mg)(SO
 
4
)
 
2
·4H
 
2
O
7.CC.50Changoite
Na
 
2
Zn(SO
 
4
)
 
2
·4H
 
2
O
7.CC.50Zincblödite
7.CC.55Leonite
K
 
2
Mg(SO
 
4
)
 
2
·4H
 
2
O
7.CC.55Mereiterite
K
 
2
Fe(SO
 
4
)
 
2
·4H
 
2
O
7.CC.60Boussingaultite
(NH
 
4
)
 
2
Mg(SO
 
4
)
 
2
·6H
 
2
O
7.CC.60Cyanochroite
K
 
2
Cu(SO
 
4
)
 
2
·6H
 
2
O
7.CC.60Konyaite
Na
 
2
Mg(SO
 
4
)
 
2
·5H
 
2
O
7.CC.60Mohrite
(NH
 
4
)
 
2
Fe(SO
 
4
)
 
2
·6H
 
2
O
7.CC.60Nickelboussingaultite
(NH
 
4
)
 
2
Ni(SO
 
4
)
 
2
·6H
 
2
O
7.CC.60Picromerite
K
 
2
Mg(SO
 
4
)
 
2
·6H
 
2
O
7.CC.65Polyhalite
K
 
2
Ca
 
2
Mg(SO
 
4
)
 
4
·2H
 
2
O
7.CC.70Leightonite
K
 
2
Ca
 
2
Cu(SO
 
4
)
 
4
·2H
 
2
O
Other Names for Wattevilleite
Synonyms:
Wattevillite
German names:
Wattevilleit
Spanish names:
Wattevilleita
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 Wattevilleite
Reference List:Singer, S. (1879): Beitraege zur Kenntniss der am Bauersberge bei Bischofscheim vor der Rhön vorkommenden Sulfate, p. 18.



Palache, Charles, Harry Berman & Clifford Frondel (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Seventh edition, Volume II: 452.



Periodico di Mineralogia: 54: 34.


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    Localities for Wattevilleite
     		

    (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.

    Germany
     
    

    • Bavaria
    

      • Franconia
    

        • Rhön Mts
    

          • Bischofsheim
    

            • Bauersberg Mt.
    
    		Singer, S. (1879): Beitraege zur Kenntniss der am Bauersberge bei Bischofscheim vor der Rhön vorkommenden Sulfate, p. 18.
    Hungary
     
    

    • Borsod-Abaúj-Zemplén Co.
    

      • Rudabányai Mts.
    

        • Rudabánya
    
    		No reference listed
    

    


    

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