Lukas Bitterlich, Peter Tropper, Ulrike Töchterle, Daniela Schmidmair, Hannes Krüger, Barbara Stopp, Anton Stefan Schwarz
Die Untersuchung kalzinierter Schaf/Ziegen-, Schweine- und Rinderknochen der bronzezeitlichen Brandopferdeponie Weer-Stadlerhof und deren Hoch-T Verhalten

Geo.Alp 12, 2015, p. 5–22

Abstract
This investigation deals with the thermal behavior of bovine bones and its implications for calcinated bovine bones from the Bronze-Age ritual immolation site Weer-Stadlerhof. In the course of this research project differential thermal analysis (DTA), thermogravimetric analysis (TGA) and high-T XRD on bovine bones were conducted. Combined DTA-TGA experiments showed that at approximately 320-350°C degassing of the largest proportion of organic material occurs. This can be a fraction between 14 and 21 % of the organic material in the bone. High-T XRD shows that bone material is badly crystallized apatite at room temperature but at about 500-600°C this hydroxyapatite changes into highly crystallized anhydrous apatite. XRD measurements also allowed the determination of the crystallite size of bovine bones from the ritual immolation site Weer-Stadlerhof. These calcinated animal bones show well-crystallized apatite comparable to experimentally heated apatite at temperatures above 650°C.


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