Thermal Studies of Some Minerals, No. 2

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

A Note on Occurrence of Zeolites in the Miocene Formation in Shimane Prefecture, Japan

Modes of occurrence of zeolites comprised in some members of the Miocene formation distributing in Shimane Prefecture have been preliminarily inspected and for convenience classified into several types almost regardless of their geneses or stage of formation though with some allusion

Infrared Absorption in Microcline

Infrared absorption spectra appearing on the microcline specimens, collected from the Ishikawa pegmatite deposit in Fukushima Prefecture, Japan, have been prudently inspected especially by means of polarised radiation. The results thus obtained have not been so much agreeable with the data given previously for the fine-grained or synthesized specimens when examined under non-polarised radiation and even with those attained for particular orientation in contrast to the present work with polarised radiation along several directions on some specifically oriented thin-plates