%0 Journal Article %A FRAZIER, P. D. %A FOWLER, B. O. %T X-Ray Diffraction and Infrared Study of the ‘Sulphur Granules’ of Actinomyces bovis %D 1967 %J Microbiology, %V 46 %N 3 %P 445-450 %@ 1465-2080 %R https://doi.org/10.1099/00221287-46-3-445 %I Microbiology Society, %X SUMMARY Bovine actinomycosis exudate was studied to determine the chemical composition and mineral phase(s) of the so-called ‘sulphur granules’. The major constituents, CaO and P2Os, accounted for 86–89% of the ashed granules. The granules also contained Na, K, Mg (as oxides) and Cl which added up to 10–14 %. Although the X-ray diffraction patterns indicated only poorly formed apatite; the infrared spectrum could be interpreted as arising from poorly crystallized apatite and/or a partially dehydrated or hydrolysed octacalcium phosphate either or both mixed with anhydrous dicalcium phosphate. The formation of pyrophosphate (44·5 %) in the ignited granules indicated the presence of considerable acid phosphate in the original material. %U https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-46-3-445