KOBEITE FROM THE USHIO MINE, KYOTO PREFECTURE. JAPAN AND RE-EXAMINATION OF KOBEITE
1961 年 3 巻 3 号 p. 139-147
詳細
1961 年 3 巻 3 号 p. 139-147
A black prismatic kobeitc-like mineral from a granite pegmatite of the Ushio mine in Ômiya town, Kyoto Prefecture and the kobeite from the original locality have been studied. Both the chemical analyses and the X-ray powder patterns of heated materials of the two minerals gave the concordant results. The two minerals contain notable amount of zirconium and after heat treatment give X-ray patterns similar to those of stabilized cubic zirconia.
Kobeite will not be a member of the euxenite-polycrase series but may be a distinct mineral species of multiple oxide containing Y, Fe, U, Ti, Zr and Nb as the main components.
