Occurrence of rare titanium-niobium-rich astrophyllite in the Podili alkali granite pluton, Prakasam district, Andhra Pradesh, India.

The article focuses on the study of finding a rare titanium-niobium-rich astrophyllite in the Podili alkali granite pluton in Andhra Pradesh, India. It mentions that occurrence of astrophyllite, a hydrous potassium iron titanium silicate, has been the result of immense petrographic and mineral chemistry studies. It also mentions that chemical composition of astrophyllite grains has been determined by electron microprobe.