№

Heat treatment temperature °С

Average crystallite size nm

Crystal lattice parameters

Crystal system

Phase

JCPDS PDF №

1

Without thermal treatment 

~11

а=3,5 Å; b=4,37 Å; c= 11,55 Å

α=90°; β =90°; γ=90° 

 Orthorhombic

V2O5.1,6H2O

40-1296

2

400

~18

 а=11,516 Å; b=3,5656Å; c=4,3727 Å

 α=90°; β =90°; γ=90°

α-V2O5

41-1426

3

600

~18

4

650

~18

5

700

~19