What is "ikranite"

n. (context mineralogy English) A trigonal-ditrigonal pyramidal brownish yellow mineral containing calcium, cerium, chlorine, fluorine, hafnium, hydrogen, iron, lanthanum, manganese, neodymium, niobium, oxygen, potassium, silicon, sodium, strontium, titanium, and zirconium.

Ikranite is a member of the eudialyte group, named after the Shubinov Institute of Crystallography of the Russian Academy of Sciences. It is a cyclosilicate mineral that shows trigonal symmetry with the space group R3m, and is often seen with a pseudo-hexagonal habit. Ikranite appears as translucent and ranges in color from yellow to a brownish yellow. This mineral ranks a 5 on Mohs Scale of Hardness, though it is considered brittle, exhibiting conchoidal fracture when broken.