Thermal Analysis Curves of Minerals

Thermal analysis is widely used in the investigation of minerals, e.g. for identification, quantitative analysis and studies of isomorphism, water existence, etc. [1-7], In this chapter, more than 400 TA curves of minerals are collected in 138 figures which are derived from data obtained at the author s laboratory. Furthermore, data are cited from Ref. [3], 

Measurement conditions were as follows Apparatus, LCT-2B thermal analyzer (Beijing Optical Instrument Factory) sample mass, 10 mg (unless indicated otherwise) reference material, AI2O3 (10 mg) heating rate, 20 °C min atmosphere, static air thermocouple Pt-Pt/Rh cru- 

The major thermal properties of natural elements are characterized by melting. Polymorphic transformations and oxidation are also observed by heating process. 

Amount of sample 100 mg + 20 mg AljOj,- reference material 150 mg annealed AljOj thermocouples Pt-Pt o/Rhi (t 0.1-0.3 mm heating rate 10 °C min furnace atmosphere air. 

96 °C endotherm, structural transformahon from orthorhombic to monoclic form 130 °C endotherm, melting (melting point of sulfur 119 °C [2]) 380 °C exotherm, sulfur oxidizes to SOj. 

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