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Prewittite

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Formula:
KPb
 
1.5
ZnCu
 
6
(SeO
 
3
)
 
2
O
 
2
Cl
 
10
System:OrthorhombicColour:Olive green
This page provides mineralogical data about Prewittite.

Classification of Prewittite

IMA status:Approved 2002
Nickel-Strunz 10th (pending) edition ID:4.JG.

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
G : Selenites with additional anions, without H2O
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Type Occurrence of Prewittite

Type Locality:Northern Breakthrough (North Breach), Great Fissure (Main Fracture) eruption, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia

Physical Properties of Prewittite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:Olive green

Crystallography of Prewittite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Pnnm {P21/n 21/n 2/m}
Cell Parameters:a = 9.132Å, b = 19.415Å, c = 13.213Å
Ratio:a:b:c = 0.47 : 1 : 0.681
Unit Cell Volume:V 2,342.64 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
8.26(70)
7.63(60)
4.11(90)
3.660(100)
2.996(40)
2.887(50)
2.642(40)
Comments:From Type Description.

Optical Data of Prewittite

Type:Biaxial (-)

Chemical Properties of Prewittite

Formula:
KPb
 
1.5
ZnCu
 
6
(SeO
 
3
)
 
2
O
 
2
Cl
 
10
Essential elements:Cl, Cu, K, O, Pb, Se, Zn
All elements listed in formula:Cl, Cu, K, O, Pb, Se, Zn

Relationship of Prewittite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.JG.05Georgbokiite
Cu
 
5
(SeO
 
3
)
 
2
O
 
2
Cl
 
2
4.JG.05Parageorgbokiite
Cu
 
5
(SeO
 
3
)
 
2
O
 
2
Cl
 
2
4.JG.10Chloromenite
Cu
 
9
(SeO
 
3
)
 
4
O
 
2
Cl
 
6
4.JG.15Sophiite
Zn
 
2
(SeO
 
3
)Cl
 
2
4.JG.20Ilinskite
(Na,K)Cu
 
5
(SeO
 
3
)
 
2
O
 
2
Cl
 
3
4.JG.25Francisite
Cu
 
3
Bi(SeO
 
3
)
 
2
O
 
2
Cl
4.JG.30Derriksite
Cu
 
4
(UO
 
2
)(SeO
 
3
)
 
2
(OH)
 
6
 · H
 
2
O
4.JG.35Burnsite
KCdCu
2+
7
(SeO
 
3
)
 
2
O
 
2
Cl
 
9
4.JG.40Allochalcoselite
Cu
+
 
PbCu
2+
5
(SeO
 
3
)
 
2
Cl
 
5
O
 
2

Other Names for Prewittite

Synonyms:
IMA2002-041
Other Languages:
German:Prewittit

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 Prewittite

Reference List:

- +
IMA approved minerals 2002

Internet Links for Prewittite

Search Engines:
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    • External Links:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
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    • Localities for Prewittite

    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.
    Russia
     
    • Far-Eastern Region
      • Kamchatka Oblast'
        • Tolbachik volcano
          • Great Fissure (Main Fracture) eruption
    		IMA approved minerals 2002
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