2021
DOI: 10.21315/jps2021.32.2.8
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Spanish Colonial Period Bricks from Churches in Laguna, Philippines: A Preliminary Chemical Characterisation Using X-ray Diffraction, Energy Dispersive X-ray Fluorescence and Fourier Transform Infrared

Abstract: Spanish Colonial Period brick samples dating to the 19th century from the Municipalities of Liliw and Pagsanjan in Laguna, Philippines was investigated. These samples were obtained from two church structures, a church bell tower from Liliw and a church convent from Pagsanjan. Combined X-ray diffraction (XRD), energy dispersive X-ray fluorescence (EDXRF) and Fourier transform infrared (FTIR) spectroscopy allowed the determination of chemical elements and minerals attributed to clay and sand, such as montmorillo… Show more

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“…Figure 8 shows a continued weight loss from 22°C until it plateaued at around 720°C. Maximum weight loss at about 700°C is typical of recarbonated CaCO 3 and not from pure CaCO 3 (Cayme et al 2021b). Hence, the sample is a processed material.…”
Section: Thermal Analysismentioning
confidence: 96%
“…Figure 8 shows a continued weight loss from 22°C until it plateaued at around 720°C. Maximum weight loss at about 700°C is typical of recarbonated CaCO 3 and not from pure CaCO 3 (Cayme et al 2021b). Hence, the sample is a processed material.…”
Section: Thermal Analysismentioning
confidence: 96%