Research Article

Effects of Calcination on the Crystallography and Nonbiogenic Aragonite Formation of Ark Clam Shell under Ambient Condition

Figure 6

PXRD patterns of ACS after calcination at 600–1000°C for 3 hours and cooling down with −10°C min−1, which were kept under ambient condition for nine months (C = calcite; A = aragonite; H = P-trigonal Ca(OH)2; and O = fcc CaO).