(Fig. 15).
Multiple crystalline patterns were observed. Some of the signals
seem to overlap with each other, but crystalline magnesium
phosphate and pyrophosphate (Fig. 15a) was identified according to
database. Additionally crystalline AlPO4 was observed. In case of
TPE-S/AlPi/ZB/PPO (Fig. 15b) the AlPO4 structures gave broader
signal suggesting that in this system aluminium phosphate is
forming less ordered structure. Further, crystalline zinc phosphate
and pyrophosphate, as well as borophosphate were confirmed.