July 28, 2026 Dataset Open Access

Abdolahzade, Mahsa; Renno, Axel D.; Debastiani, Rafaela; Ebert, Doreen; Guy, Bradley; Moeckel, Robert

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{
  "type": "dataset", 
  "abstract": "<p>Data publication from the Master&#39;s thesis &quot;<strong>Mapping Metal Phase Distribution in Historical Muldenh&uuml;tten Slag Using X-ray Computed Tomography</strong>&quot; by <strong>Mahsa Abdolahzade</strong>.</p>\n\n<p>The data is described in the file &quot;Data publication description relative to the Master thesis Mahsa&nbsp;Abdolahzade&quot;</p>\n\n<p>Abstract:&nbsp;<br>\nHistorical metallurgical slags are heterogeneous multiphase materials in which metal-rich constituents may occur as highly localised internal domains. This thesis developed and evaluated an X-ray computed tomography (XCT) workflow for the non-destructive three-dimensional characterisation of selected historical Muldenh&uuml;tten slags. The methodological focus was the distinction and quantification of three broad attenuation-based classes: internal pores, the dominant slag matrix and high-attenuation features.</p>\n\n<p>Multiscale XCT was applied to samples MS15 and MS18 from slag group SL7 and MS35 from slag group SL3. Fragment scans were used to visualise internal heterogeneity and guide region-of-interest selection, followed by higher-resolution scanning of 11 extracted cylindrical cores. Scan-specific grey-value thresholds, spatial masks and connected-component analysis were used to quantify class volumes and evaluate feature connectivity.&nbsp;Complementary micro-X-ray fluorescence mapping and targeted SEM&ndash;EDS and mineral liberation analysis (MLA) constrained the chemical and mineralogical interpretation of selected XCT-visible regions, while existing X-ray diffraction data provided sample-level context.</p>\n\n<p>The slag matrix dominated all analysed cores, accounting for 86.38&ndash;98.02 vol.%. Internal pore fractions ranged from 0.62 to 7.57 vol.%, while high-attenuation material generally represented 0.59&ndash;2.80 vol.%. MS15-01-C1 was a clear exception, containing 12.90 vol.% high-attenuation material, of which 88.2% occurred in one connected region. Correlative &micro;XRF and MLA results identified this feature as a localised Pb-rich metallic domain containing native Pb, Sb-bearing alloys and subordinate sulphide-bearing phases. The remaining investigated volumes were predominantly silicate dominated and contained smaller, more dispersed high-attenuation features.</p>\n\n<p>The results demonstrate that conventional grey-value segmentation is suitable for quantifying broad structural and attenuation classes where sufficient contrast exists, but not for complete mineral-specific classification of complex slag. Overlapping attenuation responses, scan-dependent grey values, spatial-resolution limits, artefacts and partial-volume effects restricted phase separation. The developed workflow is therefore most effective as a non-destructive localisation and volumetric characterisation method integrated with targeted chemical and mineralogical analyses. It provides a basis for representative sample selection and future metal-deportment, recovery and environmental studies, while the results remain specific to the analysed fragments and core volumes.<br>\n&nbsp;</p>", 
  "id": "4769", 
  "version": "1 - 28.07.2026", 
  "DOI": "10.14278/rodare.4769", 
  "title": "Data publication from the Master's thesis \"Mapping Metal Phase Distribution in Historical Muldenh\u00fctten Slag Using X-ray Computed Tomography\" by Mahsa Abdolahzade.", 
  "publisher": "Rodare", 
  "author": [
    {
      "family": "Abdolahzade, Mahsa"
    }, 
    {
      "family": "Renno, Axel D."
    }, 
    {
      "family": "Debastiani, Rafaela"
    }, 
    {
      "family": "Ebert, Doreen"
    }, 
    {
      "family": "Guy, Bradley"
    }, 
    {
      "family": "Moeckel, Robert"
    }
  ], 
  "issued": {
    "date-parts": [
      [
        2026, 
        7, 
        28
      ]
    ]
  }
}