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Cleusonite

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Formula:
(Pb,Sr)(U
4+
 
,U
6+
 
)(Fe
2+
 
,Zn)
 
2
(Ti,Fe
2+
 
,Fe
3+
 
)
 
18
(O,OH)
 
38
System:TrigonalColour:Black
Member of:Crichtonite Group
Name:
For the type locality.


A member of the Crichtonite Group.

Cleusonite is partly metamict. The radiation damage results in macroscopic swelling (i. e. variable density and unit cell dimensions) and also makes the mineral appear optically isotropic. The calculated density and the crystallographical data given here are those of a crystal treated at 1000 °C (Wülser et al., 2005).

A large number of U-bearing "senaites" from Alpine localities later turned out to be cleusonite instead.

Classification of Cleusonite

IMA status:Approved 1998
Strunz 8th edition ID:4/C.09-90
Nickel-Strunz 10th (pending) edition ID:4.CC.40

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
C : Metal: Oxygen = 2: 3,3: 5, and similar
C : With large and medium-sized cations
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Type Occurrence of Cleusonite

Type Locality:Cleuson lake, Nendaz Valley, Wallis (Valais), Switzerland
General Appearance of Type Material:cm-sized tabular crystals
Geological Setting of type material:greenschist facies metamorphosed gneissic series of the Mont Fort and Siviez-Mischabel Nappes

Physical Properties of Cleusonite

Lustre:Sub-Metallic
Diaphaneity (Transparency):Opaque
Colour:Black
Density (measured):4.74 - 4.93 g/cm3
Density (calculated):5.27 g/cm3

Crystallography of Cleusonite

Crystal System:Trigonal
Class (H-M):3 - Pyramidal
Space Group:R3
Cell Parameters:a = 10.385(2) Å, c = 20.900(7) Å
Ratio:a:c = 1 : 2.013
Unit Cell Volume:V 1,952.05 ų (Calculated from Unit Cell)
Morphology:Multiple rhombohedra and hexagonal prisms.
Twinning:Generally twinned.
Comment:Cells: a = 10.576(3), c = 21.325(5) Å (untreated crystal) to a = 10.4188(6), c = 20.942(1) Å (800°C treatment) and to a = 10.385(2), c = 20.900(7) Å (1000°C treatment).

Optical Data of Cleusonite

Type:Isotropic
Colour in reflected light:light grey to white

Chemical Properties of Cleusonite

Formula:
(Pb,Sr)(U
4+
 
,U
6+
 
)(Fe
2+
 
,Zn)
 
2
(Ti,Fe
2+
 
,Fe
3+
 
)
 
18
(O,OH)
 
38
Simplified for copy/paste:(Pb,Sr)(U4+,U6+)(Fe2+,Zn)2(Ti,Fe2+,Fe3+)18(O,OH)38
Essential elements:Fe, O, Pb, Ti, U
All elements listed in formula:Fe, H, O, Pb, Sr, Ti, U, Zn
Common Impurities:Al,Mn,V

Relationship of Cleusonite to other Species

Member of:Crichtonite Group
Other Members of Group:

- +
Almeidaite
PbZn
 
2
(Mn,Y)(Ti,Fe
3+
 
)
 
18
O
 
37
(OH,O)
Crichtonite
(Sr,La,Ce,Y)(Ti,Fe
3+
 
,Mn)
 
21
O
 
38
Davidite-(Ce)
(Ce,La)(Y,U,Fe)(Ti,Fe)
 
20
(O,OH)
 
38
Davidite-(La)
(La,Ce)(Y,U,Fe)(Ti,Fe)
 
20
(O,OH)
 
38
Davidite-(Y)
(La,Ce,Na,Ca,Pb)(Y,Fe
2+
 
,◻)(Fe
2+
 
,Mn
2+
 
)
 
2
(Ti,Fe
3+
 
,Nb,Zr)
 
18
O
 
38
(hypothetical)
Dessauite-(Y)
(Sr,Pb)(Y,U)(Ti,Fe
3+
 
)
 
20
O
 
38
Gramaccioliite-(Y)
(Pb,Sr)(Y,Mn)Fe
3+
2
(Ti,Fe
3+
 
)
 
18
O
 
38
Landauite
NaMnZn
 
2
(Ti,Fe)
 
6
Ti
 
12
O
 
38
Lindsleyite
(Ba,Sr)(Zr,Ca)(Fe,Mg)
 
2
(Ti,Cr,Fe)
 
18
O
 
38
Loveringite
(Ca,Ce,La)(Zr,Fe)(Mg,Fe)
 
2
(Ti,Fe,Cr,Al)
 
18
O
 
38
Mapiquiroite
(Sr,Pb)(U,Y)Fe
 
2
(Ti,Fe
3+
 
,Cr
3+
 
)
 
18
O
 
38
Mathiasite
(K, Ba, Sr)(Zr, Fe)(Mg,Fe)
 
2
(Ti,Cr,Fe)
 
18
O
 
38
Paseroite
PbMn
2+
 
(Mn
2+
 
,Fe
3+
 
)
 
2
(V
5+
 
,Ti,◻)
 
18
O
 
38
Romanite
(◻,Pb,Ca)UFe
2+
2
(Ti,Fe
3+
 
)
 
6
Ti
 
12
O
 
38
Senaite
Pb(Ti,Fe,Mn)
 
21
O
 
38
Unnamed (HBU UK-4)
NaFe
2+
 
Zn
 
2
(Ti,Fe
3+
 
,Nb)
 
6
Ti
 
12
O
 
38
Related Minerals - Nickel-Strunz Grouping):

- +
4.CC.05Chrombismite
Bi
 
16
CrO
 
27
4.CC.10Freudenbergite
Na
 
2
(Ti,Fe)
 
8
O
 
16
4.CC.15Grossite
CaAl
 
4
O
 
7
4.CC.20Chlormayenite
Ca
 
12
Al
 
14
O
 
32
Cl
 
2
4.CC.25Yafsoanite
Ca
 
3
Zn
 
3
(TeO
 
6
)
 
2
4.CC.30Latrappite
(Ca,Na)(Nb,Ti,Fe)O
 
3
4.CC.30Lueshite
NaNbO
 
3
4.CC.30Natroniobite
NaNbO
 
3
4.CC.30Perovskite
CaTiO
 
3
4.CC.30Barioperovskite
BaTiO
 
3
4.CC.30Lakargiite
Ca(Zr,Sn,Ti)O
 
3
4.CC.30Megawite
CaSnO
 
3
4.CC.35Loparite-(Ce)
(Na,Ce,Ca,Sr,Th)(Ti,Nb,Fe)O
 
3
4.CC.35Macedonite
PbTiO
 
3
4.CC.35Tausonite
SrTiO
 
3
4.CC.35Isolueshite
(Na,La,Ca)(Nb,Ti)O
 
3
4.CC.40Crichtonite
(Sr,La,Ce,Y)(Ti,Fe
3+
 
,Mn)
 
21
O
 
38
4.CC.40Davidite-(Ce)
(Ce,La)(Y,U,Fe)(Ti,Fe)
 
20
(O,OH)
 
38
4.CC.40Davidite-(La)
(La,Ce)(Y,U,Fe)(Ti,Fe)
 
20
(O,OH)
 
38
4.CC.40Davidite-(Y)
(La,Ce,Na,Ca,Pb)(Y,Fe
2+
 
,◻)(Fe
2+
 
,Mn
2+
 
)
 
2
(Ti,Fe
3+
 
,Nb,Zr)
 
18
O
 
38
(hypothetical)
4.CC.40Landauite
NaMnZn
 
2
(Ti,Fe)
 
6
Ti
 
12
O
 
38
4.CC.40Lindsleyite
(Ba,Sr)(Zr,Ca)(Fe,Mg)
 
2
(Ti,Cr,Fe)
 
18
O
 
38
4.CC.40Loveringite
(Ca,Ce,La)(Zr,Fe)(Mg,Fe)
 
2
(Ti,Fe,Cr,Al)
 
18
O
 
38
4.CC.40Mathiasite
(K, Ba, Sr)(Zr, Fe)(Mg,Fe)
 
2
(Ti,Cr,Fe)
 
18
O
 
38
4.CC.40Senaite
Pb(Ti,Fe,Mn)
 
21
O
 
38
4.CC.40Dessauite-(Y)
(Sr,Pb)(Y,U)(Ti,Fe
3+
 
)
 
20
O
 
38
4.CC.40Gramaccioliite-(Y)
(Pb,Sr)(Y,Mn)Fe
3+
2
(Ti,Fe
3+
 
)
 
18
O
 
38
4.CC.45Diaoyudaoite
NaAl
 
11
O
 
17
4.CC.45Hawthorneite
Ba(MgTi
 
3
Cr
 
4
Fe
 
4
)O
 
19
4.CC.45Hibonite
(Ca,Ce)Al
 
12
O
 
19
4.CC.45Lindqvistite
Pb
 
2
Mn
2+
 
Fe
 
16
O
 
27
4.CC.45Magnetoplumbite
(Pb,Mn)(Fe,Mn)
 
12
O
 
19
4.CC.45Plumboferrite
Pb
 
2
Fe
3+
11-x
Mn
2+
x
O
 
19-2x
, x = 1/3
4.CC.45Yimengite
K(Cr,Ti,Fe,Mg)
 
12
O
 
19
4.CC.45Haggertyite
Ba[Fe
2+
6
Ti
 
5
Mg]O
 
19
4.CC.45Nežilovite
PbZn
 
2
(Mn
4+
 
,Ti
4+
 
)
 
2
Fe
3+
8
O
 
19
4.CC.45Batiferrite
Ba[Ti
 
2
Fe
3+
8
Fe
2+
2
]O
 
19
4.CC.45Hibonite-(Fe)
(Fe,Mg)Al
 
12
O
 
19
4.CC.45Barioferrite
BaFe
3+
12
O
 
19
4.CC.50Jeppeite
(K,Ba)
 
2
(Ti,Fe)
 
6
O
 
13
4.CC.55Zenzénite
Pb
 
3
(Fe,Mn)
 
4
Mn
 
3
O
 
13
4.CC.60Mengxianminite
(Ca,Na)
 
3
(Fe,Mn)
 
2
Mg
 
2
(Sn,Zn)
 
5
Al
 
8
O
 
29

Other Names for Cleusonite

Synonyms:
IMA1998-070PlumbodaviditeUranium-rich Senaite
Other Languages:
Simplified Chinese:羟铅铀钛铁矿
Traditional Chinese:羥鉛鈾鈦鐵礦

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 Cleusonite

Reference List:

- +
Wülser, P.-A., Meisser, N., Brugger, J., Schenk, K., Ansermet, S., Bonin, M., Bussy, F. (2005): Cleusonite, (Pb,Sr)(U4+,U6+)(Fe2+,Zn)2(Ti,Fe2+,Fe3+)18(O,OH)38, a new mineral species of the crichtonite group from the western Swiss Alps. European Journal of Mineralogy, 17, 933-942

Internet Links for Cleusonite

Search Engines:
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  • Look for Cleusonite on Wikipedia
  • Look for Cleusonite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
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  • Localities for Cleusonite

    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.
    (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
      • Hohe Tauern
        • Hafner group
          • Rennweg
            • Katschberg
    Niedermayr, G. et al. (2007): Neue Mineralfunde aus Österreich LVI. Carinthia II, 197/117, 149-190.
    • Lower Austria
      • Waldviertel
        • Brunn an der Wild
          • Atzelsdorf
    Pristacz, H., jun., Kolitsch, U., Löffler, E., Knobloch, G., Prayer, A. & Thinschmidt, A. (2011): 1696) Calcit, Natrojarosit, Palygorskit, Pyrit, Siderit und andere Mineralien aus dem Marmorbruch Atzelsdorf, Brunn an der Wild, Waldviertel. Pp. 160-161 in Niedermayr, G. et al. (2011): Neue Mineralfunde aus Österreich LX. Carinthia II, 201./121., 135-186.
    • Salzburg
      • Hohe Tauern
        • Rauris valley
          • Hüttwinkl valley
    Gerhard Brandstetter collection (analysed); Blass, G. & Graf, H.W. (2004): „Cleusonit“ vom Kaiserer-Bruch im Rauriser Tal - Informationen zum Senait-Crichtonit-Problem. MINERALIEN-Welt 15 (3), 80; BRANDSTÄTTER, F. & NIEDERMAYR, G. (2008): 1539. Cleusonit (ehemals „Senait“) aus den „Gneisplatten“-Brüchen in der Rauris und von der „Pramleiten“, südlich Schellgaden im Lungau – eine Richtigstellung. In: G. Niedermayr, C. Bauer, F. Bernhard, G. Blass, H.-P. Bojar, F. Brandstätter, J. Gröbner, V. M. F. Hammer, G. Koch, U. Kolitsch, B. Leikauf, C. Loránth, R. Poeverlein, W. Postl, H. Prasnik, T. Schachinger, P. Tomazic & F. Walter, Neue Mineralfunde aus Österreich LVII, Carinthia II, 198/118, 248-249.
    BRANDSTÄTTER, F. & NIEDERMAYR, G. (2008): 1539. Cleusonit (ehemals „Senait“) aus den „Gneisplatten“-Brüchen in der Rauris und von der „Pramleiten“, südlich Schellgaden im Lungau – eine Richtigstellung. In: G. Niedermayr, C. Bauer, F. Bernhard, G. Blass, H.-P. Bojar, F. Brandstätter, J. Gröbner, V. M. F. Hammer, G. Koch, U. Kolitsch, B. Leikauf, C. Loránth, R. Poeverlein, W. Postl, H. Prasnik, T. Schachinger, P. Tomazic & F. Walter, Neue Mineralfunde aus Österreich LVII, Carinthia II, 198/118, 248-249.
    China
     
    • Shaanxi Province
      • Weinan Prefecture
        • Hua Co.
    Dianhao Huang, Yichang Wang, Fengjun Nie, and Xiujie Jiang (1984): Acta Geologica Sinica 63(3)
    Italy
     
    • Trentino-Alto Adige
      • Bolzano Province (South Tyrol)
        • Vizze Valley (Pfitsch Valley)
          • San Giacomo
            • Vizze pass (Pfitsch pass)
    Folie, K., P. Gentile, M. Hanke & I. Rocchetti (2010): Mineralien aus der Umgebung des Pfitscher Jochs in Südtirol (II). Mineralien-Welt 21 (4), 42-67.
    Republic of Macedonia
     
    P.-A. Wülser et al.: Eur. J. Mineral. 17:933-942 (2005)
    Switzerland
     
    • Wallis (Valais)
      • Anniviers Valley
        • Chandolin
    Ansermet, S. (2012): Mines et minéraux du Valais - II. Anniviers et Tourtemagne. With contributions by N. Meisser, Ed. Porte-plumes (Ayer)
        • Saint-Luc
    Wulser P.A. et al. 2005, Eur. J. Mineral. 17, 933-942
    Ansermet, S. (2012): Mines et minéraux du Valais - II. Anniviers et Tourtemagne. With contributions by N. Meisser, Ed. Porte-plumes (Ayer)
    Ansermet, S. (2012): Mines et minéraux du Valais - II. Anniviers et Tourtemagne. With contributions by N. Meisser, Ed. Porte-plumes (Ayer)
    Ansermet, S. (2012): Mines et minéraux du Valais - II. Anniviers et Tourtemagne. With contributions by N. Meisser, Ed. Porte-plumes (Ayer)
      • Nendaz Valley
    Wülser et al.: Eur. J. Mineral. 17:933-942 (2005)
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