No.

XRD identification results

α-YSi₂ (Hex.)^*1 or β-Y₃Si₅ (Hex.)^*2

β-YSi₂ (Ortho.)^*1

Si

Y₂SiO₅ and/or Y₂Si₂O₇

Y₂O₃

1

vs

―

m

tr

w

2

―

vs

w

tr

―

3

vs

―

w

w

―

4

vs

―

m

―

―

5

vs

―

m

―

―