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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:||184.108.40.206|
38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
4 : AXO4
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Type Occurrence of Cheralite
|Type Locality:||Kuttakuzhi (Kuttankuli), Thiruvananthapuram (Trivandrum), Thiruvananthapuram District, Kerala (Travancore), India|
Physical Properties of Cheralite
Crystallography of Cheralite
Optical Data of Cheralite
|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|
Chemical Properties of Cheralite
|Simplified for copy/paste:||(Ca,Ce)(Th,Ce)(PO4)2|
|Essential elements:||Ce, O, P|
|All elements listed in formula:||Ca, Ce, O, P, Th|
Relationship of Cheralite to other Species
|Member of:||Monazite Group|
|Other Members of Group:|
|Related Minerals - Nickel-Strunz Grouping):|
Other Names for Cheralite
|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
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
Localities for Cheralite
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.
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