Rockbridgeite inclusion in rock crystal from Galileia region, Minas Gerais, Brazil

Faulstich, Fabiano Richard Leite; Schnellrath, Jurgen; Oliveira, Luiz Fernando Cappa de; Scholz, Ricardo

doi:10.1127/0935-1221/2013/0025-2307

Cited by 2 publications

(1 citation statement)

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“…A small quantity of calcium carbonate (CaCO 3 ) was also revealed, the occurrence of which can be ascribed to the mosaic mortar, since the tile surfaces and bodies look intact, although moved along from their inclusion points in the mosaic pavement. On the basis of such observation, it can be supposed that the tiles have slipped from their location because of pressure exerted by the degradation product (of a chemical or biological nature), which caused a physical degradation with structural failure of the mortar [13,14].…”

Section: Resultsmentioning

confidence: 99%

Visual and Physical Degradation of the Black and White Mosaic of a Roman Domus under Palazzo Valentini in Rome: A Preliminary Study

Colantonio

Baldassarri²,

Avino

et al. 2022

Molecules

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Palazzo Valentini, the institutional head office of Città Metropolitana di Roma Capitale, stands in in a crucial position in the Roman archaeological and urban contexts, exactly between the Fora valley, Quirinal Hill slopes, and Campus Martius. It stands on a second-century A.D. complex to which belong, between other archeological remains, two richly decorated aristocratic domus. One of these buildings, the domus A, presents an outward porticoed room with a fourth-century AD central impluvium (open air part of the atrium designed to carry away rainwater) with a black/white tiled mosaic pavement, the preservation status of which is compromised by an incoherent degradation product that has caused gradual detachment of the mosaic tiles. To identify the product and determine the causes of degradation, samples of the product were taken and subjected to SEM-EDS, XRF, NMR, FT-IR and GC-MS analyses. The findings reported in this study can help restorers, archaeologists and conservation scientists in order to improve knowledge about the Roman mosaic, its construction phases, conservation problems and proper solutions.

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Section: Resultsmentioning

confidence: 99%