41. Zonation is a characteristic of monazite . 42. These domains are widely accepted to represent episodes in geological history during monazite growth or recrystallisation. 43. Monazite grains which show useful relations with microtextures or host minerals are selected for compositional mapping.44. In the case of monazite , the rare earth elements are replaced by Ca and Th. 45. It is prepared by solvent extraction from the mixed lanthanides isolated from bastn�site ( or monazite ). 46. Historically, mischmetal was prepared from monazite , an anhydrous phosphate of the light lanthanides and thorium. 47. Ilmenite is used for extraction of titanium and Monazite for extraction of thorium are found at Bheemunipatnam. 48. House bricks are quite soft compared to concrete, monazite and granite, and mortar even softer. 49. Monazite is characterised for its high Pb retention ability even at high temperatures for a prolonged period.50. That means one age is generated for a single monazite crystal or for a group of crystals.
