Chemical and mineralogical characterization of ancient Portuguese ceramic tiles of the first quarter of the XVIIIth century
Bibliographic record
Abstract
The main objective of the present work is to establish a correlation between the characteristics of the ceramic body of ancient tiles and the workshop where they were made. The work was carried out with tiles from the Museu Nacional do Azulejo collection, but the aim is to study the most important period of the history of tiles in Portugal, the first quarter of the 18th century, the so called Ciclo dos Mestres (Master’s Cycle). In the present work, we make use of SEM-EDS and DRX to determine the major constituents of the ceramic body, as well as to evaluate the procedure used to produce the tiles. Signed and unsigned tiles were used. The analysis of the chemical composition, mineralogical phases, shape and size of particles combined with historical information allowed to conclude that the tiles of the panel Vista de Lisboa (MNAz inv. 1) and Senhora dos Corações have identical global chemical composition but not the same mineralogical characteristics. Two other tiles featuring King Charles II (MNAz inv. 691) and his wife Queen Catherine of Braganza (MNAz inv. 690), present different properties, which indicate another provenience of the clay materials and, probably, another workshop and painter.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".