Thermal Analysis Curves of Arsenide Minerals

Arsenide minerals undergo polymorphic transformation, melting, dehydration and recrystallization of the dehydrated and decomposed substances. [Pg.312]

Berzelite, NaCa2 (MgMn)2[As04]3 II, mimetite, Pb2Pb3[As04l3Cl. [Pg.312]

Mimetite—1069 °C endotherm, mimetite melts and subsequently evaporates. [Pg.312]

Mansfieldite— 203 °C endotherm, mansfieldite releases water of crystallization. At a temperature higher than 1050 °C, AIASO4 sublimes. [Pg.313]

Hoemesite—68, II8, 223 °C and 297 °C endotherms, hoemesite releases crystalline water and is transformed to Mg3(As04)2 673 °C exotherm, Mg3(As04)2 recrystallizes 735 °C exotherm, Mg3(As04)2 undergoes a polymorphic transformation 1209 °C endotherm, Mg3(As04)2 melts. [Pg.313]

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