(Ce,La,Th)PO4Monoclinic
Monazite
(Ce,La,Th)PO4
PhosphatesChemical Formula(Ce,La,Th)PO4
Crystal SystemMonoclinic
Mohs Hardness5.5
Specific Gravity5.1
ColorBrown, reddish brown, yellow
LusterResinous to waxy
StreakWhite
CleavageOne direction
FractureConchoidal to uneven
Occurrence
Found in granite pegmatites and placers. Ore of rare earth elements and thorium.