Abstract Cyclotetraphosphate K 2 Pb[P 4 O 12 ] transforms into the lead diphosphate Pb 2 P 2 O 7 crystallographically oriented by heating up to its transformation point at 537°C in a moist atmosphere. The oriented formation of diphosphate takes place by means of epitaxy.
Mohamed Faouzi ZidAhmed DrissT. Jouini