For the purpose of discerning the inner structures of chlorite group from one another, thermal variations of the related specimens collected from a chromite deposit in serpentinite have been continuously traced during the heated states at various temperatures up to ca. 950°C kept respectively for long enough hours by means of X-ray diffractometer ac-companying the specific heating apparatus and a few data obtained through infra-red absorption have been added to for reference.今村外治教授退官記念特集
