Cheralite

Cheralite is an anhydrous phosphate mineral with the ideal chemical formula CaTh(PO₄)₂.^[1]^[2] It is isomorphous with huttonite and monazite. It can be regarded as the product of the complete cationic substitution in the system:

2 LREE³⁺ ↔ Ca²⁺ + Th⁴⁺.

It was previously known under the name brabantite.

Physical properties:^[2]


Property	Value
Lustre	Vitreous
Description	Dull or greasy
Colour	Grayish brown to reddish brown (on rims), pale yellow, brownish green
Hardness	5 on Mohs scale
Density	4.72 - 5.02 g/cm³

References

↑ Kees Linthout. "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, Canadian Mineralogist 45 (2007) 503-508" (PDF). Retrieved May 11, 2018.
1 2 Cheralite on Mindat.org

[1] Kees Linthout. "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, Canadian Mineralogist 45 (2007) 503-508" (PDF). Retrieved May 11, 2018.

[:0-2] 1 2 Cheralite on Mindat.org

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References