The optics of a possible new interference figure in mineralogy
Bibliographic record
Abstract
Abstract For eight decades, the number of interference figures in optical mineralogy has remained constant: three figures for uniaxial minerals and seven for biaxial ones. Each figure has its own specificities and formation conditions. However, the grossular garnets of the Quixeramobim region in Brazil exhibit a possible new type of interference figure: the “mosaic.” This rare characteristic is present in seven samples of grossular garnet from the region. In this paper, we explain how this new interference figure, named “mosaic,” is formed using optical mineralogy principles. When viewed with the quartz-gypsum accessory plate, these samples show an agglutination of colors, with blue, yellow, and purple appearing together in a mosaic configuration. This figure is formed by the different directions of vibration of light as it passes through these anisotropic garnets. Thus, in this configuration, the optic axes and acute and obtuse bisectrix occur in such a way that they are at the same time inclined (//) and perpendicular (⊥) manners. So far, the interference “mosaic” has been observed only in garnets of the grossular group; it occurs only in minerals that require a high degree of optical disorder.
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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 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| 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".