WHAT DOES YB:GLASS & ER MEAN?

 4a,b. And it could be proved with the orientation marriage by PF mapping, as revealed in Fig. 4c,d, analyzing it by which the near-packed airplane 200 of diopside and also the close-packed plane 111 of spinel attained. In addition to, the different orientation relationship with PF mapping could be expressed with the several points overlapped, fo