X-Ray Spectrometry & Archaeometallurgical Alloy Dating
“Analyzing Metal-Silt Diffusion on Tudor Pilgrim Badges”
Spectrometry Alloy Archaeometry Simulator
Rheological modeling & dynamic physical mapping of this topic
Input Control Parameters
Adjusts molecular kinetic movement and thermal agitation coefficients.
Sets the percentage of colloidal particles suspended within the system.
Regulates internal shear resistance and electrostatic clay platelet binding.
Microscopic Particle Lattice
System Calculations
1X-Ray Fluorescence Spectrometry Mechanics
Handheld XRF devices bombard river finds with primary X-rays. This excites the atoms in the metal alloy, causing them to emit secondary, characteristic fluorescent X-rays that reveal the precise element composition in seconds.
- Fluorescence: Non-destructive analysis protects valuable historical relics.
- Element Blueprint: Measures copper, tin, lead, and silver ratios down to ppm.
2Lead-Tin Alloy Composition of Pilgrim Badges
Medieval and Tudor pilgrim badges were made from cheap lead-tin pewter alloys. XRF analysis identifies trace impurities like bismuth and antimony, which serve as geographic markers indicating which medieval smelter produced the metal.
- Trace Impurities: Antimony and bismuth levels map medieval mining sites.
- Alloy Ratios: Higher lead fractions indicate late-medieval, lower-cost productions.
3Silt Diffusion and Surface Passivation Chemistry
Because the Thames silt is anaerobic, lead-pewter badges develop a highly stable, thin surface passivation layer of lead sulfide (Galena). This black coating stops further metal loss and acts as a chemical time capsule.
- Galena Skin: Lead reacts with bacterially-produced sulfur to form FeS/PbS.
- Interface Preservation: Keeps the microscopic badge details sharp for 600 years.