abstract |
A NEW CRYSTALLINE FORM OF MELAMINE PYROPHOSPHATE HAVING ITS MAXIMUM INTENSITY AT A PEAK IN ITS X-RAY DIFFRACTION PATTERN OF 3.25 A. AND A PROCESS FOR MAKING IT WHEREIN A PYROPHOSPHATE SALT IS ADDED TO AN AQUEOUS SYSTEM OF MELAMINE AND A MINERAL ACID PRESENT IN AT LEAST TWICE THE STOICHIOMERIC AMOUNT OF MELAMINE ARE PROVIDED. |