An investigation into the internal and external variables acting on crystallinity index using Fourier Transform Infrared Spectroscopy on unaltered and burned bone

The application of histomorphometry and Fourier Transform Infrared Spectroscopy to the analysis of early Anglo-Saxon burned bone

“…As can be seen, there is a general trend with increased cremation intensity of increasing CI and a drop in C/P. This is in keeping with previously published work (such as Thompson et al 2009;2010). Despite the relatively large standard deviations present (a likely feature of sample size) it is possible to distinguish archaeological unburned bone from archaeological burned bone.…”

“…The colour of each bone was recorded using Munsell soil colour charts (2000). Each sample was taken using a scalpel from the periosteal surface of the anterior distal third of a femoral diaphysis and was stored in a sealed test tube as recommended by Thompson et al (2010). Inhumed samples, from the same anatomical locations, were used as a control for the study.…”

The Analysis of Heat-Induced Crystallinity Change in Bone

“…A baseline correction is usually applied between 750 and 450 cm −1 (Shemesh, 1990;Thompson et al, 2011). As crystal size increases, A 565 and A 605 increase -since they correspond to two anti-symmetric bending vibration bands of phosphate, v 4 PO 4 (Lebon et al, 2010;Thompson et al, 2013) -whilst A 595 decreases, resulting in an overall CI increase .…”

Primeras determinaciones radiocarbónicas de la necrópolis de Setefilla (Lora del Río) y el inicio del periodo orientalizante en Andalucía occidental

“…Los resultados fueron bastante variables, con valores IC entre 2,8 y 6,3. Como los valores IC en materia ósea completamente recristalizada suelen caer entre 5,0 y 7,0, para evitar cualquier riesgo de contaminación postdeposicional por absorción de carbonatos exógenos, se estableció un valor umbral de 5,0 (Thompson et al 2009;Thompson et al 2011). Muestras con un valor IC bajo este umbral se excluyeron del programa, lo que ocasionó la invalidación de la mayoría de las muestras preseleccionadas.…”