Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Thermal Annealing and Phase Transformation of Serpentine-like Garnierite

Version 1 : Received: 7 January 2021 / Approved: 8 January 2021 / Online: 8 January 2021 (12:59:34 CET)

A peer-reviewed article of this Preprint also exists.

Kumar, A.; Cassetta, M.; Giarola, M.; Zanatta, M.; Le Guen, M.; Soraru, G.D.; Mariotto, G. Thermal Annealing and Phase Transformation of Serpentine-Like Garnierite. Minerals 2021, 11, 188. Kumar, A.; Cassetta, M.; Giarola, M.; Zanatta, M.; Le Guen, M.; Soraru, G.D.; Mariotto, G. Thermal Annealing and Phase Transformation of Serpentine-Like Garnierite. Minerals 2021, 11, 188.

Journal reference: Minerals 2021, 11, 188
DOI: 10.3390/min11020188

Abstract

This study deals with vibrational and crystallographic aspects of the thermally induced transformation of serpentine-like garnierite into quartz, forsterite, and enstatite occurring at about 620 °C. Powder specimens of garnierite have been annealed in static air between room temperature and 1000 °C. The resulting products from the transformations detected based on thermogravimetric and differential thermal analysis, have been extensively characterized via microRaman spectroscopy, and X-ray diffraction. Our study shows that serpentine-like garnierite consists of a mixture of different mineral species. Furthermore, these garnierites and their composition can provide details based on the mineralogy and the crystalline phases resulting from the thermal treatment.

Subject Areas

Garnierite, Phase transformation, TGA/DSC, XRD, micro Raman spectroscopy

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