THE CRYSTAL STRUCTURE OF EMILITE, Cu10.7Pb10.7Bi21.3S48, THE SECOND 45 A DERIVATIVE OF THE BISMUTHINITE AIKINITE SOLID-SOLUTION SERIES
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Bibliographic record
Abstract
The crystal structure of the new mineral species emilite, discovered in the Felbertal scheelite deposit, Austria [Cu10.7Pb10.7Bi21.3S48, Pmc 21, a 4.0285(8), b 44.986(9), c 11.599(2) A], reveals it to be a new 45 A member of the bismuthinite – krupkaite – aikinite solid-solution series. A refinement of the crystal structure was made with single-crystal measurements, which included 2943 observed unique reflections (I > 2σI) and resulted in R 1 = 6.6% ( R W = 22.4%). The crystal structure is composed of a fairly complex sequence of krupkaite-like and aikinite-like structure intervals. Emilite is structurally an analogue of the only other 45 A member of the series, salzburgite (Cu6.4Pb6.4Bi25.6S48). Where one structure has [001] rows of Cu-filled tetrahedra, the other has empty or half-empty tetrahedra, and vice versa . The oversubstitution of Cu in the krupkaite-like intervals in the structure causes a departure from an idealized Cu10Pb10Bi22S48 composition and might be required by a metric fit between the krupkaite and aikinite modules in the structure and thus be a prerequisite for its stabilization.
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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 | 0.001 | 0.003 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 it