{
  "id": 9649047,
  "title": "Materials analysis sheds light on minting mystery of 1834 British sixpence",
  "url": "https://urgent.news/2026/09/24/materials-analysis-sheds-light-on-minting-mystery-of-1834-british",
  "topic": "science",
  "section": "Science",
  "published": "2026-09-24T23:00:08.000Z",
  "source": {
    "name": "Phys.org",
    "slug": "phys-org",
    "url": "https://phys.org/news/2026-09-materials-analysis-minting-mystery-british.html"
  },
  "original_language": "en",
  "account": null,
  "summary": "A severely deformed 1834 British silver sixpence has provided valuable insights into an unusual minting anomaly, according to a study published in npj Heritage Science. The coin, which was discovered in a mixed coin album at a flea market in Greater Manchester, displayed significant deformation primarily in the central fields, while the rim and edge milling remained comparatively well-preserved. Using advanced techniques such as scanning electron microscopy, chemical analysis, and three-dimensional surface measurements, researchers identified severe localized deformation involving repeated high-pressure loading under partial lateral constraint. This explanation is favored over ordinary wear, corrosion, or a single unconstrained later impact, as the chemical, microscopic, and topographic findings collectively support the mint-stage striking anomaly hypothesis. The study combined various analytical methods, including SEM-EDX and optical surface profilometry, to accurately characterize the coin's surface and reveal abrupt changes in relief, steep-sided troughs, raised shoulders, terraced structures, and overlapping displacement in the most severely affected areas.",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}