Abstract:
:A new discrimination method for the bioapatite materials bone, antler and ivory was developed using X-ray diffractometry and comprises non-invasive measurements in order to take valuable objects into account. Our approach deals with the analysis of peak intensity ratios resulting from several measurements on each object. For instance, the intensity ratio of the apatite reflections 002 and 310 has been described in the literature as representing the degree of apatite crystal orientation and varies depending on the sample orientation. The decisive factor for the material identification is the value dispersion of intensity ratios resulting from the total of all measurements on one object. This pattern of data points, visualised via kernel density estimation (KDE), is characteristic for ivory, bone and antler, respectively, and enables the discrimination of these materials. The observation is justifiable since apatite crystal orientation adapts to the collagen fibre arrangement which shows major differences between different sorts of bioapatite materials. The patterns of data points were received via analysis of 88 objects made of bone (n = 30), antler (n = 27) and ivory (n = 31). In order to verify several identifications X-ray computer tomography was supplemented. The presented method usefully supplements already existing approaches concerning microscopic, elementary and biochemical analyses.
journal_name
Forensic Sci Intjournal_title
Forensic science internationalauthors
Hoelzig H,Muenster T,Blanke S,Kloess G,Garmasukis R,Koenig Adoi
10.1016/j.forsciint.2020.110159subject
Has Abstractpub_date
2020-03-01 00:00:00pages
110159eissn
0379-0738issn
1872-6283pii
S0379-0738(20)30021-9journal_volume
308pub_type
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