title: Cheralite
text: # Cheralite
  
  Cheralite is an anhydrous phosphate mineral with the ideal chemical formula $CaTh(PO_4)_2.$ It is isomorphous with huttonite and monazite. It can be regarded as the product of the complete cationic substitution in the system:
  
  2 $LREE^{3+}$ ↔ $Ca^{2+}$ + $Th^{4+}.$
  
  It was previously known under the name brabantite.
  
  Physical properties:
  
  | 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 $g/cm^3$ |
  