What is "kangite"

Kangite is an exceedingly rare mineral, a natural form of scandium oxide, though its is an impure and vacant scandia, with the formula (Sc,Ti,Al,Zr,Mg,Ca,□)O. In terms of chemistry it scandium-analogue of tistarite (both discovered in the famous Allende meteorite), hematite, corundum, eskolaite, karelianite, bixbyite, avicennite, and yttriaite-(Y). Kangite is one of sparse scandium minerals.