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Cheralite

Big Photo

Valzergues, Decazeville, Aveyron, Midi-Pyrénées, France
© Jacques Valverde

Show Cheralite Photos (4)
Formula:
(Ca,Ce)(Th,Ce)[PO
 
4
]
 
2
System:MonoclinicLustre:Vitreous
Hardness:5


Monazite Group. The CaTh(PO4)2-dominant member of the group.
Redefined very recently (Linthout, 2007).
Not to be confused with the recently discredited cheralite-(Ce) (= Ca-rich monazite-(Ce)).

Classification of Cheralite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered" 1953
Explanation of status:CNMMN 05-F: The name cheralite is applied to the members dominated by CaTh(PO4)2 in the system 2(REEPO4) - CaTh(PO4)2 - 2(ThSiO4); the name brabantite is discredited; see Linthout (2007).
Strunz 8th edition ID:7/A.15-40
Strunz 9th edition ID:8.BD.50
Nickel-Strunz 10th (pending) edition ID:8.AD.50

8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
D : With only large cations
Dana 8th edition ID:38.4.3.5

38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
4 : AXO4
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Type Occurrence of Cheralite

Type Locality:Kuttakuzhi (Kuttankuli), Trivandrum, Kerala (Travancore), India

Physical Properties of Cheralite

Lustre:Vitreous
Hardness (Mohs):5

Crystallography of Cheralite

Crystal System:Monoclinic

Optical Data of Cheralite

Type:Biaxial (+)
RI values: nα = 1.779 nβ = 1.780 nγ = 1.817
2V:Measured: 17° to 20°, Calculated: 20°
Maximum Birefringence:δ = 0.038

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

Chemical Properties of Cheralite

Formula:
(Ca,Ce)(Th,Ce)[PO
 
4
]
 
2
Essential elements:Ce, O, P
All elements listed in formula:Ca, Ce, O, P, Th

Relationship of Cheralite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.AD.05Nahpoite
Na
 
2
HPO
 
4
8.AD.10Monetite
CaHPO
 
4
8.AD.10Weilite
CaHAsO
 
4
8.AD.10Švenekite
Ca(H
 
2
AsO
 
4
)
 
2
8.AD.15Archerite
(K,NH
 
4
)[H
 
2
PO
 
4
]
8.AD.15Biphosphammite
(NH
 
4
,K)H
 
2
PO
 
4
8.AD.20Phosphammite
(NH
 
4
)
 
2
HPO
 
4
8.AD.25Buchwaldite
NaCaPO
 
4
8.AD.30Schultenite
PbHAsO
 
4
8.AD.35Chernovite-(Y)
YAsO
 
4
8.AD.35Dreyerite
BiVO
 
4
8.AD.35Wakefieldite-(Ce)
(Ce,Pb)VO
 
4
8.AD.35Wakefieldite-(Y)
YVO
 
4
8.AD.35Xenotime-(Y)
YPO
 
4
8.AD.35Pretulite
ScPO
 
4
8.AD.35Xenotime-(Yb)
(Yb,Y,HREE)PO
 
4
8.AD.35Wakefieldite-(La)
LaVO
 
4
8.AD.40Pucherite
BiVO
 
4
8.AD.45Ximengite
BiPO
 
4
8.AD.50Gasparite-(Ce)
(Ce,REE)AsO
 
4
8.AD.50Monazite-(Ce)
(Ce,La,Nd,Th)PO
 
4
8.AD.50Monazite-(La)
(La,Ce,Nd)PO
 
4
8.AD.50Monazite-(Nd)
(Nd,La,Ce)PO
 
4
8.AD.50Rooseveltite
BiAsO
 
4
8.AD.50Monazite-(Sm)
(Sm,Gd,Ce,Th)(PO
 
4
)
8.AD.50UM2005-35-VO:CaFePSiTh
(Th,Ca)[VO
 
4
,SiO
 
4
,PO
 
4
]
8.AD.55Tetrarooseveltite
Bi(AsO
 
4
)
8.AD.60Chursinite
(Hg-Hg)
 
0.5
Hg
2+
 
[AsO
 
4
]
8.AD.65Clinobisvanite
BiVO
 
4

Other Names for Cheralite

Other Languages:
German:Cheralith
Russian:Чералит

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 Cheralite

Reference List:Neues Jahrbuch für Mineralogie, Monatshefte (1995), 344-350.

Anthony, Bideaux, Bladh & Nichols (2000), Handbook of Mineralogy, Vol. IV: 105.

American Mineralogist: 38: 734.

American Mineralogist: 39: 403.

American Mineralogist (1967): 52: 13.

Mineralogical Magazine 43 (1980): 885.

Trends in Mineralogy (1992): 1: 103.

Linthout, K. (2007): Tripartite division of the system 2REEPO4 – CaTh(PO4)2– 2ThSiO4, discreditation of brabantite, and recognition of cheralite as the name for members dominated by CaTh(PO4)2. Can. Mineral. 45, 503-508.

Internet Links for Cheralite

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    Localities for Cheralite

    Hide Locality List
    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.
    Australia
     
    • Victoria
      • Lake Boga
    		Mills, S. J., Birch, W. D., Maas, R., Phillips, D. & Plimer, I. R. (2008) Lake Boga Granite, northwestern Victoria: mineralogy, geochemistry and geochronology, Australian Journal of Earth Sciences, 55(3), 281–299.
    Austria
     
    • Styria
      • Kindberg
        • Hadersdorf
    		Taucher, J. (1998)
    Brazil
     
    • Southeast Region
      • Minas Gerais
        • Poços de Caldas plateau
          • Caldas
    		Waber (1991)
          • Poços de Caldas
    		Baretto & Fujimori (1986)
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Liberec Region
    		Scharm, B.: Přehled minerálů nalezených v oblasti uranových koncentrací v severočeské křídě. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 1995, roč. 3, s. 169-172.
      • Plzeň Region
        • Sušice (Schüttenhofen)
    		Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
      • Ústí Region
        • Šluknov (Schluckenau)
    		Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
    France
     
    • Midi-Pyrénées
      • Aveyron
        • Decazeville
    		Lheur C., Peraud W., Meisser N. (2002), Résultats d'analyses concernant les arséniates et découverte de chéralite-(Ce) à la mine de Valzergues (Aveyron), Le Cahier des Micromonteurs, n°2, pp: 3-8
    Germany
     
    • Bavaria
      • Upper Palatinate
        • Oberpfälzer Wald
          • Vohenstrauß
            • Waidhaus
              • Hagendorf
    		Schnorrer, G., Kronz, A. & Pascher,G. (2003): Cheralith, Monazit und Xenotim - drei neue Minerale der Xenotim-Monazit-Gruppe sowie Uranosphaerit, ein sekundäres Wismut-Uran-Mineral vom ehemaligen Phosphatpegmatit Hagendorf-Süd/Oberpfalz. Aufschluss, 54, 267-272. (in German)
    • Rhineland-Palatinate
      • Eifel Mts
        • Mayen
          • Ettringen
            • Bellerberg volcano
              • Ettringer Bellerberg Mt. (Bellberg Mt.; Bellenberg Mt.; Billenberg Mt.; Boilenberg Mt.)
    		Blass, G., Graf, HW., Kolitsch, U., Sebold, D., Über neue Mineralfunde aus der Vulkaneifel, MW 6/2005
    Hungary
     
    • Baranya Co.
    		Nagy, G., (2003): Nacareniobsite in Phonolites in the Mecsek Mts. (Hungary) - Second occurrence in the world, Acta Mineralogica-Petrographica, Abstract series 1, Szeged 2003
    • Fejér Co.
      • Velencei Mts.
        • Lovasberény
    		Szakáll & Gatter, 1993
    India
     
    • Kerala (Travancore)
      • Trivandrum
    		Min.Mag.(1953) 30, 93-99
    Italy
     
    • Tuscany
      • Livorno Province
        • Campiglia Marittima
          • Mount Spinosa
    		P. Orlandi, P. (1997): Zibaldone di mineralogia italiana. Rivista Mineralogica Italiana, 22(2), 179-185.
    Laos
     
    • Bokeo Province
      • Huay Xai
    		Sutherland, F.L., Bosshart, G., Fanning, C.M., Hoskind, P.W.O., and Coenraads, R.R. (2002): Journal of Asian Earth Sciences 20(7), 841-849.
    Madagascar
     
    • Fianarantsoa Province
      • Horombe Region
        • Ihosy District
          • Ihosy
    		Rakotondrazafy, A.F.M., Giuliani, G., Ohnenstetter, D., Fallick, A.E., Rakotosamizanany, S., Andriamamonjy, A., Ralantoarison, T., Razanatseheno, M., Offant, Y., Garnier, V., Maluski, H., Dunaigre, C., Schwarz, D., and Ratrimo, V. (2008): Ore Geology Reviews 34, 134-154.
    Morocco
     
    • Meknès-Tafilalet Region
      • Khénifra Province
        • High Atlas Mts
          • Tamazeght complex
    		Khadem Allah, B. (1993)
    Poland
     
    • Lower Silesia (Dolnośląskie)
    		Kucha H., Wieczorek A. 1980: Ca1-xTh1-xRE2x[PO4]2 . 2H2O, a new mineral from Lower Silesia, Poland. Mineralogia Polonica, vol. 11, No 1, 123-136
    Slovakia
     
    • Bratislava Region
      • Malé Karpaty Mts
        • Bratislava
    		Chudík, P. & Uher, P. (2009): Mitt. Österr. Mineral. Ges. 155, 40. (Abs.)
    Switzerland
     
    • Ticino (Tessin)
      • Lago Maggiore
        • Brissago
    		Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): Mineralienlexikon der Schweiz. Wepf (Basel), p. 110.
    USA
     
    • Michigan
      • Marquette Co.
        • Marquette iron range
          • Republic
    		Rebecca A. Simmons (2009) \"Minerals of the Grizzly Pegmatite, Marquette County, Michigan\", Mineral News, 25, #4, 1 & 12-13.
    • Nevada
      • Nye Co.
        • Tolicha District
    		NBMG Spec. Pub. 31 Minerals of Nevada
    • Wisconsin
      • Marathon Co.
    		Hanson, S.L., et al (1999) Rocks and Minerals, 74, 184
        • Rib Mountain
    Minerals of the Stettin pluton, Marathon County, Wisconsin. A. Falster, Rocks & Minerals, 61(2), 1986, pp 74–78.
    • Wyoming
      • Carbon Co.
        • Encampment District
          • Encampment
    		Dave Harris (location specified by dealer).
    Mineral and/or Locality
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